diff --git a/core/modules/announcements_feed/tests/src/Kernel/AnnounceFetcherTest.php b/core/modules/announcements_feed/tests/src/Kernel/AnnounceFetcherTest.php
index 012ba4bf5e4a..7161ece790e6 100644
--- a/core/modules/announcements_feed/tests/src/Kernel/AnnounceFetcherTest.php
+++ b/core/modules/announcements_feed/tests/src/Kernel/AnnounceFetcherTest.php
@@ -68,7 +68,7 @@ class AnnounceFetcherTest extends AnnounceTestBase {
   /**
    * Data provider for testShowAnnouncements().
    */
-  public function providerShowAnnouncements(): array {
+  public static function providerShowAnnouncements(): array {
     return [
       '1' => [
         'feed_item' => [
diff --git a/core/modules/announcements_feed/tests/src/Unit/AnnounceFetcherUnitTest.php b/core/modules/announcements_feed/tests/src/Unit/AnnounceFetcherUnitTest.php
index 6e8f9097fb29..f919d86c1cfa 100644
--- a/core/modules/announcements_feed/tests/src/Unit/AnnounceFetcherUnitTest.php
+++ b/core/modules/announcements_feed/tests/src/Unit/AnnounceFetcherUnitTest.php
@@ -57,7 +57,7 @@ class AnnounceFetcherUnitTest extends UnitTestCase {
   /**
    * Data for the testValidateUrl.
    */
-  public function urlProvider(): array {
+  public static function urlProvider(): array {
     return [
       ['https://www.drupal.org', TRUE],
       ['https://drupal.org', TRUE],
diff --git a/core/modules/ban/tests/src/Kernel/Plugin/migrate/source/d7/BlockedIpsTest.php b/core/modules/ban/tests/src/Kernel/Plugin/migrate/source/d7/BlockedIpsTest.php
index 80adf4ec548d..e2121ca8a837 100644
--- a/core/modules/ban/tests/src/Kernel/Plugin/migrate/source/d7/BlockedIpsTest.php
+++ b/core/modules/ban/tests/src/Kernel/Plugin/migrate/source/d7/BlockedIpsTest.php
@@ -20,7 +20,7 @@ class BlockedIpsTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     $tests[0]['source_data']['blocked_ips'] = [
diff --git a/core/modules/big_pipe/tests/src/Unit/Render/Placeholder/BigPipeStrategyTest.php b/core/modules/big_pipe/tests/src/Unit/Render/Placeholder/BigPipeStrategyTest.php
index cedb65d997d4..864449845b79 100644
--- a/core/modules/big_pipe/tests/src/Unit/Render/Placeholder/BigPipeStrategyTest.php
+++ b/core/modules/big_pipe/tests/src/Unit/Render/Placeholder/BigPipeStrategyTest.php
@@ -63,7 +63,7 @@ class BigPipeStrategyTest extends UnitTestCase {
   /**
    * @see \Drupal\big_pipe_test\BigPipePlaceholderTestCases
    */
-  public function placeholdersProvider() {
+  public static function placeholdersProvider() {
     $cases = BigPipePlaceholderTestCases::cases();
 
     // Generate $placeholders variable as expected by
diff --git a/core/modules/big_pipe/tests/src/Unit/StackMiddleware/ContentLengthTest.php b/core/modules/big_pipe/tests/src/Unit/StackMiddleware/ContentLengthTest.php
index 08682e400c78..34388d32eadf 100644
--- a/core/modules/big_pipe/tests/src/Unit/StackMiddleware/ContentLengthTest.php
+++ b/core/modules/big_pipe/tests/src/Unit/StackMiddleware/ContentLengthTest.php
@@ -37,7 +37,7 @@ final class ContentLengthTest extends UnitTestCase {
     $this->assertSame((string) $expected_header, $response->headers->get('Content-Length'));
   }
 
-  public function providerTestSetContentLengthHeader() {
+  public static function providerTestSetContentLengthHeader() {
     $response = new Response('Test content', 200);
     $response->headers->set('Content-Length', (string) strlen('Test content'));
     return [
diff --git a/core/modules/block/tests/src/Kernel/Plugin/migrate/source/BlockTest.php b/core/modules/block/tests/src/Kernel/Plugin/migrate/source/BlockTest.php
index b0f507e126ec..a6621f972f0c 100644
--- a/core/modules/block/tests/src/Kernel/Plugin/migrate/source/BlockTest.php
+++ b/core/modules/block/tests/src/Kernel/Plugin/migrate/source/BlockTest.php
@@ -20,7 +20,7 @@ class BlockTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/block/tests/src/Kernel/Plugin/migrate/source/d6/BlockTranslationTest.php b/core/modules/block/tests/src/Kernel/Plugin/migrate/source/d6/BlockTranslationTest.php
index 18dd8041350b..479318646b43 100644
--- a/core/modules/block/tests/src/Kernel/Plugin/migrate/source/d6/BlockTranslationTest.php
+++ b/core/modules/block/tests/src/Kernel/Plugin/migrate/source/d6/BlockTranslationTest.php
@@ -21,7 +21,7 @@ class BlockTranslationTest extends BlockTest {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     // Test data is the same as BlockTest, but with the addition of i18n_blocks.
     $tests = parent::providerSource();
 
diff --git a/core/modules/block/tests/src/Kernel/Plugin/migrate/source/d7/BlockTranslationTest.php b/core/modules/block/tests/src/Kernel/Plugin/migrate/source/d7/BlockTranslationTest.php
index b186fc95f7e4..49b60c767e2c 100644
--- a/core/modules/block/tests/src/Kernel/Plugin/migrate/source/d7/BlockTranslationTest.php
+++ b/core/modules/block/tests/src/Kernel/Plugin/migrate/source/d7/BlockTranslationTest.php
@@ -23,7 +23,7 @@ class BlockTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
 
     // The source data.
     $tests[0]['source_data']['block'] = [
diff --git a/core/modules/block/tests/src/Unit/BlockRepositoryTest.php b/core/modules/block/tests/src/Unit/BlockRepositoryTest.php
index a5abcdf59624..15ac1c718fb1 100644
--- a/core/modules/block/tests/src/Unit/BlockRepositoryTest.php
+++ b/core/modules/block/tests/src/Unit/BlockRepositoryTest.php
@@ -112,7 +112,7 @@ class BlockRepositoryTest extends UnitTestCase {
     $this->assertEquals($expected_blocks, $result);
   }
 
-  public function providerBlocksConfig() {
+  public static function providerBlocksConfig() {
     $blocks_config = [
       'block1' => [
         AccessResult::allowed(), 'top', 0,
diff --git a/core/modules/block/tests/src/Unit/CategoryAutocompleteTest.php b/core/modules/block/tests/src/Unit/CategoryAutocompleteTest.php
index 589d1c3f4b21..f54c2a90775b 100644
--- a/core/modules/block/tests/src/Unit/CategoryAutocompleteTest.php
+++ b/core/modules/block/tests/src/Unit/CategoryAutocompleteTest.php
@@ -61,7 +61,7 @@ class CategoryAutocompleteTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestAutocompleteSuggestions() {
+  public static function providerTestAutocompleteSuggestions() {
     $test_parameters = [];
     $test_parameters[] = [
       'string' => 'Com',
diff --git a/core/modules/block/tests/src/Unit/Menu/BlockLocalTasksTest.php b/core/modules/block/tests/src/Unit/Menu/BlockLocalTasksTest.php
index 06093da237d0..52e28bc45b9b 100644
--- a/core/modules/block/tests/src/Unit/Menu/BlockLocalTasksTest.php
+++ b/core/modules/block/tests/src/Unit/Menu/BlockLocalTasksTest.php
@@ -83,7 +83,7 @@ class BlockLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function providerTestBlockAdminDisplay() {
+  public static function providerTestBlockAdminDisplay() {
     return [
       ['block.admin_display', [['block.admin_display'], ['block.admin_display_theme:test_b', 'block.admin_display_theme:test_c']]],
       ['block.admin_display_theme', [['block.admin_display'], ['block.admin_display_theme:test_b', 'block.admin_display_theme:test_c']]],
diff --git a/core/modules/block/tests/src/Unit/Plugin/DisplayVariant/BlockPageVariantTest.php b/core/modules/block/tests/src/Unit/Plugin/DisplayVariant/BlockPageVariantTest.php
index 5842e957d6d2..e057917bb5cf 100644
--- a/core/modules/block/tests/src/Unit/Plugin/DisplayVariant/BlockPageVariantTest.php
+++ b/core/modules/block/tests/src/Unit/Plugin/DisplayVariant/BlockPageVariantTest.php
@@ -68,7 +68,7 @@ class BlockPageVariantTest extends UnitTestCase {
       ->getMock();
   }
 
-  public function providerBuild() {
+  public static function providerBuild() {
     $blocks_config = [
       'block1' => [
         // region, is main content block, is messages block, is title block
diff --git a/core/modules/block/tests/src/Unit/Plugin/migrate/process/BlockSettingsTest.php b/core/modules/block/tests/src/Unit/Plugin/migrate/process/BlockSettingsTest.php
index 1aaaf0c451b0..38a14531fdb8 100644
--- a/core/modules/block/tests/src/Unit/Plugin/migrate/process/BlockSettingsTest.php
+++ b/core/modules/block/tests/src/Unit/Plugin/migrate/process/BlockSettingsTest.php
@@ -40,7 +40,7 @@ class BlockSettingsTest extends UnitTestCase {
   /**
    * Provides data for testTransform.
    */
-  public function providerTestTransform() {
+  public static function providerTestTransform() {
     return [
       'title set' => [
         [
diff --git a/core/modules/block_content/tests/src/Kernel/BlockContentAccessHandlerTest.php b/core/modules/block_content/tests/src/Kernel/BlockContentAccessHandlerTest.php
index 6d676ddb3f3a..97de5d8f204d 100644
--- a/core/modules/block_content/tests/src/Kernel/BlockContentAccessHandlerTest.php
+++ b/core/modules/block_content/tests/src/Kernel/BlockContentAccessHandlerTest.php
@@ -191,7 +191,7 @@ class BlockContentAccessHandlerTest extends KernelTestBase {
   /**
    * Data provider for testAccess().
    */
-  public function providerTestAccess(): array {
+  public static function providerTestAccess(): array {
     $cases = [
       'view:published:reusable' => [
         'view',
diff --git a/core/modules/block_content/tests/src/Kernel/BlockContentEntityReferenceSelectionTest.php b/core/modules/block_content/tests/src/Kernel/BlockContentEntityReferenceSelectionTest.php
index daeace75e232..db07637d86f1 100644
--- a/core/modules/block_content/tests/src/Kernel/BlockContentEntityReferenceSelectionTest.php
+++ b/core/modules/block_content/tests/src/Kernel/BlockContentEntityReferenceSelectionTest.php
@@ -177,7 +177,7 @@ class BlockContentEntityReferenceSelectionTest extends KernelTestBase {
   /**
    * Provides possible fields and condition types.
    */
-  public function fieldConditionProvider() {
+  public static function fieldConditionProvider() {
     $cases = [];
     foreach (['base', 'group', 'nested_group'] as $condition_type) {
       foreach ([TRUE, FALSE] as $reusable) {
diff --git a/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTest.php b/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTest.php
index 7f84eb582020..25bbe2fe3f58 100644
--- a/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTest.php
+++ b/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTest.php
@@ -20,7 +20,7 @@ class BoxTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     $tests[0]['source_data']['boxes'] = [
diff --git a/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTranslationTest.php b/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTranslationTest.php
index 548c65d1e4d1..baa43d5634ab 100644
--- a/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTranslationTest.php
+++ b/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d6/BoxTranslationTest.php
@@ -23,7 +23,7 @@ class BoxTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d7/BlockCustomTest.php b/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d7/BlockCustomTest.php
index 3a2e02d534fc..a017a86ec685 100644
--- a/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d7/BlockCustomTest.php
+++ b/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d7/BlockCustomTest.php
@@ -20,7 +20,7 @@ class BlockCustomTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     $tests[0]['source_data']['block_custom'] = [
diff --git a/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d7/BlockCustomTranslationTest.php b/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d7/BlockCustomTranslationTest.php
index ef8dccbc17ea..16e967b7e6c6 100644
--- a/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d7/BlockCustomTranslationTest.php
+++ b/core/modules/block_content/tests/src/Kernel/Plugin/migrate/source/d7/BlockCustomTranslationTest.php
@@ -23,7 +23,7 @@ class BlockCustomTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/block_content/tests/src/Unit/Access/DependentAccessTest.php b/core/modules/block_content/tests/src/Unit/Access/DependentAccessTest.php
index 338240e751c5..5abd871079a7 100644
--- a/core/modules/block_content/tests/src/Unit/Access/DependentAccessTest.php
+++ b/core/modules/block_content/tests/src/Unit/Access/DependentAccessTest.php
@@ -142,7 +142,7 @@ class DependentAccessTest extends UnitTestCase {
    * mergeAccessDependency() first. A call to either should behave the same on a
    * new RefinableDependentAccessInterface object.
    */
-  public function providerTestSetFirst() {
+  public static function providerTestSetFirst() {
     return [
       [TRUE],
       [FALSE],
diff --git a/core/modules/block_content/tests/src/Unit/Menu/BlockContentLocalTasksTest.php b/core/modules/block_content/tests/src/Unit/Menu/BlockContentLocalTasksTest.php
index 1da30a5e54d8..b81ad8905202 100644
--- a/core/modules/block_content/tests/src/Unit/Menu/BlockContentLocalTasksTest.php
+++ b/core/modules/block_content/tests/src/Unit/Menu/BlockContentLocalTasksTest.php
@@ -80,7 +80,7 @@ class BlockContentLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getBlockContentListingRoutes() {
+  public static function getBlockContentListingRoutes() {
     return [
       ['entity.block_content.collection', 'system.admin_content'],
     ];
diff --git a/core/modules/book/tests/src/Kernel/BookMultilingualTest.php b/core/modules/book/tests/src/Kernel/BookMultilingualTest.php
index f82473444c7e..089bbbc53325 100644
--- a/core/modules/book/tests/src/Kernel/BookMultilingualTest.php
+++ b/core/modules/book/tests/src/Kernel/BookMultilingualTest.php
@@ -256,7 +256,7 @@ class BookMultilingualTest extends KernelTestBase {
   /**
    * Data provider for ::testMultilingualBooks().
    */
-  public function langcodesProvider() {
+  public static function langcodesProvider() {
     return [
       [self::LANGCODE],
       ['en'],
diff --git a/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookConfigsTest.php b/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookConfigsTest.php
index f4be91f0772e..28c989bf3554 100644
--- a/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookConfigsTest.php
+++ b/core/modules/book/tests/src/Kernel/Migrate/d6/MigrateBookConfigsTest.php
@@ -32,7 +32,7 @@ class MigrateBookConfigsTest extends MigrateDrupal6TestBase {
    * @return array
    *   The data for each test scenario.
    */
-  public function providerBookSettings() {
+  public static function providerBookSettings() {
     return [
       // d6_book_settings was renamed to book_settings, but use the old alias to
       // prove that it works.
diff --git a/core/modules/book/tests/src/Kernel/Plugin/migrate/source/BookTest.php b/core/modules/book/tests/src/Kernel/Plugin/migrate/source/BookTest.php
index a73f180a85c4..d15d673a97c8 100644
--- a/core/modules/book/tests/src/Kernel/Plugin/migrate/source/BookTest.php
+++ b/core/modules/book/tests/src/Kernel/Plugin/migrate/source/BookTest.php
@@ -18,7 +18,7 @@ class BookTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/book/tests/src/Unit/BookManagerTest.php b/core/modules/book/tests/src/Unit/BookManagerTest.php
index 945b21f788f8..dd39ef8d1421 100644
--- a/core/modules/book/tests/src/Unit/BookManagerTest.php
+++ b/core/modules/book/tests/src/Unit/BookManagerTest.php
@@ -104,7 +104,7 @@ class BookManagerTest extends UnitTestCase {
    * @return array
    *   The test data.
    */
-  public function providerTestGetBookParents() {
+  public static function providerTestGetBookParents() {
     $empty = [
       'p1' => 0,
       'p2' => 0,
diff --git a/core/modules/book/tests/src/Unit/Menu/BookLocalTasksTest.php b/core/modules/book/tests/src/Unit/Menu/BookLocalTasksTest.php
index db1732cb7f43..9138f8ff1804 100644
--- a/core/modules/book/tests/src/Unit/Menu/BookLocalTasksTest.php
+++ b/core/modules/book/tests/src/Unit/Menu/BookLocalTasksTest.php
@@ -39,7 +39,7 @@ class BookLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getBookAdminRoutes() {
+  public static function getBookAdminRoutes() {
     return [
       ['book.admin'],
       ['book.settings'],
@@ -60,7 +60,7 @@ class BookLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getBookNodeRoutes() {
+  public static function getBookNodeRoutes() {
     return [
       ['entity.node.canonical'],
       ['entity.node.book_outline_form'],
diff --git a/core/modules/ckeditor5/tests/src/Functional/Update/CKEditor5UpdateImageToolbarItemTest.php b/core/modules/ckeditor5/tests/src/Functional/Update/CKEditor5UpdateImageToolbarItemTest.php
index f481448e35e3..5c950c0af964 100644
--- a/core/modules/ckeditor5/tests/src/Functional/Update/CKEditor5UpdateImageToolbarItemTest.php
+++ b/core/modules/ckeditor5/tests/src/Functional/Update/CKEditor5UpdateImageToolbarItemTest.php
@@ -146,7 +146,7 @@ class CKEditor5UpdateImageToolbarItemTest extends UpdatePathTestBase {
    * @return array
    *   The test cases.
    */
-  public function provider(): array {
+  public static function provider(): array {
     // There are 3 aspects that need to be verified, each can be true or false,
     // making for 8 test cases in total.
     $test_cases = [];
diff --git a/core/modules/ckeditor5/tests/src/FunctionalJavascript/ImageTestBase.php b/core/modules/ckeditor5/tests/src/FunctionalJavascript/ImageTestBase.php
index a30b9ce9f655..7eb2894cc95b 100644
--- a/core/modules/ckeditor5/tests/src/FunctionalJavascript/ImageTestBase.php
+++ b/core/modules/ckeditor5/tests/src/FunctionalJavascript/ImageTestBase.php
@@ -450,14 +450,14 @@ abstract class ImageTestBase extends CKEditor5TestBase {
     $this->assertVisibleBalloon('.ck-text-alternative-form');
   }
 
-  public function providerAltTextRequired(): array {
+  public static function providerAltTextRequired(): array {
     return [
       'Restricted' => [FALSE],
       'Unrestricted' => [TRUE],
     ];
   }
 
-  public function providerLinkability(): array {
+  public static function providerLinkability(): array {
     return [
       'BLOCK image, restricted' => ['block', FALSE],
       'BLOCK image, unrestricted' => ['block', TRUE],
@@ -528,7 +528,7 @@ abstract class ImageTestBase extends CKEditor5TestBase {
     $this->assertFalse($drupal_media_element->hasAttribute('data-align'));
   }
 
-  public function providerAlignment() {
+  public static function providerAlignment() {
     return [
       'Block image' => ['block'],
       'Inline image' => ['inline'],
@@ -620,7 +620,7 @@ abstract class ImageTestBase extends CKEditor5TestBase {
    *
    * @return string[][]
    */
-  public function providerWidth(): array {
+  public static function providerWidth(): array {
     return [
       'Image resize with percent unit (only allowed in HTML 4)' => [
         'width' => '33%',
@@ -674,7 +674,7 @@ abstract class ImageTestBase extends CKEditor5TestBase {
    * @return array
    *   The test cases.
    */
-  public function providerResize(): array {
+  public static function providerResize(): array {
     return [
       'Image resize is enabled' => [
         'is_resize_enabled' => TRUE,
diff --git a/core/modules/ckeditor5/tests/src/FunctionalJavascript/LanguageTest.php b/core/modules/ckeditor5/tests/src/FunctionalJavascript/LanguageTest.php
index 4a89ab103802..4b3f570cd480 100644
--- a/core/modules/ckeditor5/tests/src/FunctionalJavascript/LanguageTest.php
+++ b/core/modules/ckeditor5/tests/src/FunctionalJavascript/LanguageTest.php
@@ -82,7 +82,7 @@ JS;
    *
    * @return string[][]
    */
-  public function provider(): array {
+  public static function provider(): array {
     return [
       'Language code both in Drupal and CKEditor' => [
         'langcode' => 'th',
diff --git a/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaLinkabilityTest.php b/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaLinkabilityTest.php
index 9d9537237816..209b1de962c1 100644
--- a/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaLinkabilityTest.php
+++ b/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaLinkabilityTest.php
@@ -221,7 +221,7 @@ class MediaLinkabilityTest extends MediaTestBase {
     $this->assertEmpty($xpath->query('//a'));
   }
 
-  public function providerLinkability(): array {
+  public static function providerLinkability(): array {
     return [
       'restricted' => [FALSE],
       'unrestricted' => [TRUE],
diff --git a/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaPreviewTest.php b/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaPreviewTest.php
index ac88edb64c33..59cbf7f30748 100644
--- a/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaPreviewTest.php
+++ b/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaPreviewTest.php
@@ -186,7 +186,7 @@ class MediaPreviewTest extends MediaTestBase {
   /**
    * Data provider for ::testEmbedPreviewAccess.
    */
-  public function previewAccessProvider() {
+  public static function previewAccessProvider() {
     return [
       'media_embed filter enabled' => [
         TRUE,
diff --git a/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaTest.php b/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaTest.php
index 255c264c6372..ebbf600ed809 100644
--- a/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaTest.php
+++ b/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaTest.php
@@ -1007,7 +1007,7 @@ class MediaTest extends MediaTestBase {
   /**
    * For testing view modes in different scenarios.
    */
-  public function providerTestViewMode(): array {
+  public static function providerTestViewMode(): array {
     return [
       'with alignment' => [TRUE],
       'without alignment' => [FALSE],
diff --git a/core/modules/ckeditor5/tests/src/FunctionalJavascript/SourceEditingTest.php b/core/modules/ckeditor5/tests/src/FunctionalJavascript/SourceEditingTest.php
index a638d5676596..b7c1af2d0514 100644
--- a/core/modules/ckeditor5/tests/src/FunctionalJavascript/SourceEditingTest.php
+++ b/core/modules/ckeditor5/tests/src/FunctionalJavascript/SourceEditingTest.php
@@ -118,7 +118,7 @@ JS;
    * @return array
    *   The test cases.
    */
-  public function providerAllowingExtraAttributes(): array {
+  public static function providerAllowingExtraAttributes(): array {
     $general_test_case_markup = '<div class="llama" data-llama="🦙"><p data-llama="🦙">The <a href="https://example.com/pirate" class="button" data-grammar="subject">pirate</a> is <a href="https://example.com/irate" class="use-ajax" data-grammar="adjective">irate</a>.</p></div>';
     return [
       'no extra attributes allowed' => [
diff --git a/core/modules/ckeditor5/tests/src/Kernel/CKEditor5PluginManagerTest.php b/core/modules/ckeditor5/tests/src/Kernel/CKEditor5PluginManagerTest.php
index 469e582d2441..1ae537c185b4 100644
--- a/core/modules/ckeditor5/tests/src/Kernel/CKEditor5PluginManagerTest.php
+++ b/core/modules/ckeditor5/tests/src/Kernel/CKEditor5PluginManagerTest.php
@@ -201,7 +201,7 @@ YAML,
    * @return \Generator
    *   Test scenarios.
    */
-  public function providerTestInvalidPluginDefinitions(): \Generator {
+  public static function providerTestInvalidPluginDefinitions(): \Generator {
     yield 'invalid plugin ID with everything else okay' => [
       <<<YAML
 foo_bar:
@@ -1282,7 +1282,7 @@ PHP,
   /**
    * Provides uses cases enabling different elements and the expected results.
    */
-  public function providerTestProvidedElements(): array {
+  public static function providerTestProvidedElements(): array {
     $text_align_classes = [
       'text-align-left' => TRUE,
       'text-align-center' => TRUE,
@@ -1507,7 +1507,7 @@ PHP,
   /**
    * Provides use cases for findPluginSupportingElement().
    */
-  public function providerTestPluginSupportingElement() {
+  public static function providerTestPluginSupportingElement() {
     return [
       'tag that belongs to a superset' => [
         'tag' => 'h2',
diff --git a/core/modules/ckeditor5/tests/src/Kernel/CKEditor5StylesheetsTest.php b/core/modules/ckeditor5/tests/src/Kernel/CKEditor5StylesheetsTest.php
index 7883277e9762..248e26719883 100644
--- a/core/modules/ckeditor5/tests/src/Kernel/CKEditor5StylesheetsTest.php
+++ b/core/modules/ckeditor5/tests/src/Kernel/CKEditor5StylesheetsTest.php
@@ -46,7 +46,7 @@ class CKEditor5StylesheetsTest extends KernelTestBase {
    * @return array
    *   An array of test cases.
    */
-  public function externalStylesheetsProvider() {
+  public static function externalStylesheetsProvider() {
     return [
       'Install theme which has an absolute external CSS URL' => [
         'test_ckeditor_stylesheets_external',
diff --git a/core/modules/ckeditor5/tests/src/Kernel/SmartDefaultSettingsTest.php b/core/modules/ckeditor5/tests/src/Kernel/SmartDefaultSettingsTest.php
index 99235f7264e9..d5f50e4a98a7 100644
--- a/core/modules/ckeditor5/tests/src/Kernel/SmartDefaultSettingsTest.php
+++ b/core/modules/ckeditor5/tests/src/Kernel/SmartDefaultSettingsTest.php
@@ -649,7 +649,7 @@ class SmartDefaultSettingsTest extends KernelTestBase {
    * @return \Generator
    *   Test scenarios.
    */
-  public function provider() {
+  public static function provider() {
     $basic_html_test_case = [
       'format_id' => 'basic_html',
       'filters_to_drop' => [],
diff --git a/core/modules/ckeditor5/tests/src/Kernel/ValidatorsTest.php b/core/modules/ckeditor5/tests/src/Kernel/ValidatorsTest.php
index adacf4d2c08b..bb18c3cef653 100644
--- a/core/modules/ckeditor5/tests/src/Kernel/ValidatorsTest.php
+++ b/core/modules/ckeditor5/tests/src/Kernel/ValidatorsTest.php
@@ -110,7 +110,7 @@ class ValidatorsTest extends KernelTestBase {
   /**
    * Provides a list of Text Editor config entities using CKEditor 5 to test.
    */
-  public function provider(): array {
+  public static function provider(): array {
     $data = [];
     $data['CKEditor5::getDefaultSettings()'] = [
       // @see ::test()
@@ -703,7 +703,7 @@ class ValidatorsTest extends KernelTestBase {
   /**
    * Provides a list of Text Editor + Text Format pairs to test.
    */
-  public function providerPair(): array {
+  public static function providerPair(): array {
     // cspell:ignore donk
     $data = [];
     $data['INVALID: allow_view_mode_override condition not met: filter must be configured to allow 2 or more view modes'] = [
diff --git a/core/modules/ckeditor5/tests/src/Kernel/WildcardHtmlSupportTest.php b/core/modules/ckeditor5/tests/src/Kernel/WildcardHtmlSupportTest.php
index 9a3023738a7c..725ed1f66a2e 100644
--- a/core/modules/ckeditor5/tests/src/Kernel/WildcardHtmlSupportTest.php
+++ b/core/modules/ckeditor5/tests/src/Kernel/WildcardHtmlSupportTest.php
@@ -99,7 +99,7 @@ class WildcardHtmlSupportTest extends KernelTestBase {
     $this->assertEquals($expected_ghs_configuration, $ghs_configuration);
   }
 
-  public function providerGhsConfiguration(): array {
+  public static function providerGhsConfiguration(): array {
     return [
       'empty source editing' => [
         '<p> <br>',
diff --git a/core/modules/ckeditor5/tests/src/Unit/AlignmentPluginTest.php b/core/modules/ckeditor5/tests/src/Unit/AlignmentPluginTest.php
index 6e3ef192a32c..904fca1bc49d 100644
--- a/core/modules/ckeditor5/tests/src/Unit/AlignmentPluginTest.php
+++ b/core/modules/ckeditor5/tests/src/Unit/AlignmentPluginTest.php
@@ -19,7 +19,7 @@ class AlignmentPluginTest extends UnitTestCase {
   /**
    * Provides a list of configs to test.
    */
-  public function providerGetDynamicPluginConfig(): array {
+  public static function providerGetDynamicPluginConfig(): array {
     return [
       'All alignments' => [
         Alignment::DEFAULT_CONFIGURATION,
diff --git a/core/modules/ckeditor5/tests/src/Unit/CKEditor5Test.php b/core/modules/ckeditor5/tests/src/Unit/CKEditor5Test.php
index 7b85d9becf1f..7a202abfc2f7 100644
--- a/core/modules/ckeditor5/tests/src/Unit/CKEditor5Test.php
+++ b/core/modules/ckeditor5/tests/src/Unit/CKEditor5Test.php
@@ -62,7 +62,7 @@ class CKEditor5Test extends UnitTestCase {
    * @return array[]
    *   An array with the property path and expected form item name.
    */
-  public function providerPathsToFormNames(): array {
+  public static function providerPathsToFormNames(): array {
     return [
       'validation error targeting toolbar items' => [
         'settings.toolbar.items',
diff --git a/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php b/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php
index a923d34f8905..3452689dfbca 100644
--- a/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php
+++ b/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php
@@ -27,7 +27,7 @@ class HTMLRestrictionsTest extends UnitTestCase {
     new HTMLRestrictions($elements);
   }
 
-  public function providerConstruct(): \Generator {
+  public static function providerConstruct(): \Generator {
     // Fundamental structure.
     yield 'INVALID: list instead of key-value pairs' => [
       ['<foo>', '<bar>'],
@@ -166,7 +166,7 @@ class HTMLRestrictionsTest extends UnitTestCase {
     $this->assertCount($expected_concrete_plus_wildcard_count, $r->getAllowedElements(FALSE));
   }
 
-  public function providerCounting(): \Generator {
+  public static function providerCounting(): \Generator {
     yield 'empty' => [
       [],
       TRUE,
@@ -256,7 +256,7 @@ class HTMLRestrictionsTest extends UnitTestCase {
     $this->assertSame($expected_raw + $filter_html_additional_expectations, HTMLRestrictions::fromFilterPluginInstance($filter_plugin_instance->reveal())->getAllowedElements(FALSE));
   }
 
-  public function providerConvenienceConstructors(): \Generator {
+  public static function providerConvenienceConstructors(): \Generator {
     // All empty cases.
     yield 'empty string' => [
       '',
@@ -638,7 +638,7 @@ class HTMLRestrictionsTest extends UnitTestCase {
     $this->assertSame($expected_ghs_config, $restrictions->toGeneralHtmlSupportConfig());
   }
 
-  public function providerRepresentations(): \Generator {
+  public static function providerRepresentations(): \Generator {
     yield 'empty set' => [
       HTMLRestrictions::emptySet(),
       [],
@@ -904,7 +904,7 @@ class HTMLRestrictionsTest extends UnitTestCase {
     $this->assertEquals($expected_union, $a->merge($b));
   }
 
-  public function providerOperands(): \Generator {
+  public static function providerOperands(): \Generator {
     // Empty set operand cases.
     yield 'any set + empty set' => [
       'a' => new HTMLRestrictions(['a' => ['href' => TRUE]]),
@@ -1504,7 +1504,7 @@ class HTMLRestrictionsTest extends UnitTestCase {
     $this->assertEquals($expected_extracted_plain_tags_subset, $input->extractPlainTagsSubset());
   }
 
-  public function providerSubsets(): \Generator {
+  public static function providerSubsets(): \Generator {
     yield 'empty set' => [
       new HTMLRestrictions([]),
       new HTMLRestrictions([]),
diff --git a/core/modules/ckeditor5/tests/src/Unit/HeadingPluginTest.php b/core/modules/ckeditor5/tests/src/Unit/HeadingPluginTest.php
index bd20e30d9f1a..f6515c637a19 100644
--- a/core/modules/ckeditor5/tests/src/Unit/HeadingPluginTest.php
+++ b/core/modules/ckeditor5/tests/src/Unit/HeadingPluginTest.php
@@ -19,7 +19,7 @@ class HeadingPluginTest extends UnitTestCase {
   /**
    * Provides a list of configs to test.
    */
-  public function providerGetDynamicPluginConfig(): array {
+  public static function providerGetDynamicPluginConfig(): array {
     // Prepare headings matching ckeditor5.ckeditor5.yml to also protect
     // against unexpected changes to the YAML file given the YAML file is used
     // to generate the dynamic plugin configuration.
diff --git a/core/modules/ckeditor5/tests/src/Unit/ListPluginTest.php b/core/modules/ckeditor5/tests/src/Unit/ListPluginTest.php
index 1173e417fb31..1efae1f5b7ff 100644
--- a/core/modules/ckeditor5/tests/src/Unit/ListPluginTest.php
+++ b/core/modules/ckeditor5/tests/src/Unit/ListPluginTest.php
@@ -19,7 +19,7 @@ class ListPluginTest extends UnitTestCase {
   /**
    * Provides a list of configs to test.
    */
-  public function providerGetDynamicPluginConfig(): array {
+  public static function providerGetDynamicPluginConfig(): array {
     return [
       'startIndex is false' => [
         [
diff --git a/core/modules/ckeditor5/tests/src/Unit/SmartDefaultSettingsTest.php b/core/modules/ckeditor5/tests/src/Unit/SmartDefaultSettingsTest.php
index f590ef6311a1..ebeb5a12147c 100644
--- a/core/modules/ckeditor5/tests/src/Unit/SmartDefaultSettingsTest.php
+++ b/core/modules/ckeditor5/tests/src/Unit/SmartDefaultSettingsTest.php
@@ -34,7 +34,7 @@ class SmartDefaultSettingsTest extends UnitTestCase {
    *
    * @return \Generator
    */
-  public function providerSurplusScore(): \Generator {
+  public static function providerSurplusScore(): \Generator {
     $needed = new HTMLRestrictions(['code' => FALSE]);
 
     yield 'surplus: 1 tag, 1 attribute, 1 attribute with wildcard restriction' => [
@@ -92,7 +92,7 @@ class SmartDefaultSettingsTest extends UnitTestCase {
    *
    * @return \Generator
    */
-  public function providerCandidates(): \Generator {
+  public static function providerCandidates(): \Generator {
     $generate_definition = function (string $label_and_id, array $overrides): CKEditor5PluginDefinition {
       $annotation = [
         'provider' => 'test',
diff --git a/core/modules/ckeditor5/tests/src/Unit/SourceEditingPluginTest.php b/core/modules/ckeditor5/tests/src/Unit/SourceEditingPluginTest.php
index 13060bd98a8d..b32146fba100 100644
--- a/core/modules/ckeditor5/tests/src/Unit/SourceEditingPluginTest.php
+++ b/core/modules/ckeditor5/tests/src/Unit/SourceEditingPluginTest.php
@@ -18,7 +18,7 @@ class SourceEditingPluginTest extends UnitTestCase {
   /**
    * Provides a list of configs to test.
    */
-  public function providerGetDynamicPluginConfig(): array {
+  public static function providerGetDynamicPluginConfig(): array {
     return [
       'Empty array of allowed tags' => [
         [
diff --git a/core/modules/ckeditor5/tests/src/Unit/StylePluginTest.php b/core/modules/ckeditor5/tests/src/Unit/StylePluginTest.php
index 1418467d8dd2..6ca265b51ec6 100644
--- a/core/modules/ckeditor5/tests/src/Unit/StylePluginTest.php
+++ b/core/modules/ckeditor5/tests/src/Unit/StylePluginTest.php
@@ -18,7 +18,7 @@ class StylePluginTest extends UnitTestCase {
   /**
    * Provides a list of configs to test.
    */
-  public function providerGetDynamicPluginConfig(): array {
+  public static function providerGetDynamicPluginConfig(): array {
     return [
       'default configuration (empty)' => [
         [
diff --git a/core/modules/comment/tests/src/Kernel/CommentOrphanTest.php b/core/modules/comment/tests/src/Kernel/CommentOrphanTest.php
index 73fdf4e8039e..492eb6ffc9cc 100644
--- a/core/modules/comment/tests/src/Kernel/CommentOrphanTest.php
+++ b/core/modules/comment/tests/src/Kernel/CommentOrphanTest.php
@@ -124,7 +124,7 @@ class CommentOrphanTest extends EntityKernelTestBase {
   /**
    * Provides test data for testOrphan.
    */
-  public function providerTestOrphan() {
+  public static function providerTestOrphan() {
     return [
       ['entity_id'],
       ['uid'],
diff --git a/core/modules/comment/tests/src/Kernel/Migrate/d6/MigrateCommentTypeTest.php b/core/modules/comment/tests/src/Kernel/Migrate/d6/MigrateCommentTypeTest.php
index 084a8e1005d1..8d53bee41ba0 100644
--- a/core/modules/comment/tests/src/Kernel/Migrate/d6/MigrateCommentTypeTest.php
+++ b/core/modules/comment/tests/src/Kernel/Migrate/d6/MigrateCommentTypeTest.php
@@ -113,7 +113,7 @@ class MigrateCommentTypeTest extends MigrateDrupal6TestBase {
   /**
    * Provides test cases for ::testNoCommentTypeMigration().
    */
-  public function providerTestNoCommentTypeMigration() {
+  public static function providerTestNoCommentTypeMigration() {
     return [
       'Node module is disabled in source' => [
         'Disabled source modules' => ['node'],
diff --git a/core/modules/comment/tests/src/Kernel/Migrate/d7/CommentEntityTranslationCheckRequirementsTest.php b/core/modules/comment/tests/src/Kernel/Migrate/d7/CommentEntityTranslationCheckRequirementsTest.php
index ff780ae89af4..217427c6215c 100644
--- a/core/modules/comment/tests/src/Kernel/Migrate/d7/CommentEntityTranslationCheckRequirementsTest.php
+++ b/core/modules/comment/tests/src/Kernel/Migrate/d7/CommentEntityTranslationCheckRequirementsTest.php
@@ -46,7 +46,7 @@ class CommentEntityTranslationCheckRequirementsTest extends MigrateDrupal7TestBa
    *
    * @return string[][]
    */
-  public function providerTestCheckRequirements() {
+  public static function providerTestCheckRequirements() {
     return [
       ['comment'],
       ['node'],
diff --git a/core/modules/comment/tests/src/Kernel/Migrate/d7/MigrateCommentTypeTest.php b/core/modules/comment/tests/src/Kernel/Migrate/d7/MigrateCommentTypeTest.php
index 770464d971f7..2a82104ed5c6 100644
--- a/core/modules/comment/tests/src/Kernel/Migrate/d7/MigrateCommentTypeTest.php
+++ b/core/modules/comment/tests/src/Kernel/Migrate/d7/MigrateCommentTypeTest.php
@@ -119,7 +119,7 @@ class MigrateCommentTypeTest extends MigrateDrupal7TestBase {
   /**
    * Provides test cases for ::testNoCommentTypeMigration().
    */
-  public function providerTestNoCommentTypeMigration() {
+  public static function providerTestNoCommentTypeMigration() {
     return [
       'Node module is disabled in source' => [
         'Disabled source modules' => ['node'],
diff --git a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/CommentTypeRequirementsTest.php b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/CommentTypeRequirementsTest.php
index 7a09ad3cf8eb..03a9b7ed536b 100644
--- a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/CommentTypeRequirementsTest.php
+++ b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/CommentTypeRequirementsTest.php
@@ -47,7 +47,7 @@ class CommentTypeRequirementsTest extends MigrateDrupal7TestBase {
   /**
    * Test cases for ::testCheckCommentTypeRequirements().
    */
-  public function providerTestCheckCommentTypeRequirements() {
+  public static function providerTestCheckCommentTypeRequirements() {
     return [
       'D6 comment is disabled on source' => [
         'Disabled source modules' => ['comment'],
diff --git a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/CommentTypeTest.php b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/CommentTypeTest.php
index 91d1bfb41c06..f838a575a5bf 100644
--- a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/CommentTypeTest.php
+++ b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/CommentTypeTest.php
@@ -21,7 +21,7 @@ class CommentTypeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $node_type_rows = [
       [
         'type' => 'page',
diff --git a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d6/CommentSourceWithHighWaterTest.php b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d6/CommentSourceWithHighWaterTest.php
index 7370609aa24a..69a932f36110 100644
--- a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d6/CommentSourceWithHighWaterTest.php
+++ b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d6/CommentSourceWithHighWaterTest.php
@@ -21,7 +21,7 @@ class CommentSourceWithHighWaterTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d6/CommentTest.php b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d6/CommentTest.php
index 76f6ac2a341c..38191327f65c 100644
--- a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d6/CommentTest.php
+++ b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d6/CommentTest.php
@@ -20,7 +20,7 @@ class CommentTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d7/CommentEntityTranslationTest.php b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d7/CommentEntityTranslationTest.php
index 800929388fe5..8823e90ff9d9 100644
--- a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d7/CommentEntityTranslationTest.php
+++ b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d7/CommentEntityTranslationTest.php
@@ -22,7 +22,7 @@ class CommentEntityTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d7/CommentTest.php b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d7/CommentTest.php
index ad8f59029319..cca51f2797f6 100644
--- a/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d7/CommentTest.php
+++ b/core/modules/comment/tests/src/Kernel/Plugin/migrate/source/d7/CommentTest.php
@@ -22,7 +22,7 @@ class CommentTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php b/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php
index 496b57fbfbc8..753f949776d8 100644
--- a/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php
+++ b/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php
@@ -33,7 +33,7 @@ class ConfigLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getConfigAdminRoutes() {
+  public static function getConfigAdminRoutes() {
     return [
       ['config.sync', [['config.sync', 'config.import', 'config.export']]],
       ['config.import_full', [['config.sync', 'config.import', 'config.export'], ['config.import_full', 'config.import_single']]],
diff --git a/core/modules/config_translation/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldTranslationTest.php b/core/modules/config_translation/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldTranslationTest.php
index 22dd4150f33e..233fd4c4c7b9 100644
--- a/core/modules/config_translation/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldTranslationTest.php
+++ b/core/modules/config_translation/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldTranslationTest.php
@@ -22,7 +22,7 @@ class ProfileFieldTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $test = [];
     $test[0]['source_data'] = [
       'profile_fields' => [
diff --git a/core/modules/config_translation/tests/src/Unit/ConfigNamesMapperTest.php b/core/modules/config_translation/tests/src/Unit/ConfigNamesMapperTest.php
index 23a13bed5f97..2eaa4a14d72b 100644
--- a/core/modules/config_translation/tests/src/Unit/ConfigNamesMapperTest.php
+++ b/core/modules/config_translation/tests/src/Unit/ConfigNamesMapperTest.php
@@ -523,7 +523,7 @@ class ConfigNamesMapperTest extends UnitTestCase {
    *   hasConfigSchema() as the first value and the expected return value of
    *   ConfigNamesMapper::hasSchema() as the second value.
    */
-  public function providerTestHasSchema() {
+  public static function providerTestHasSchema() {
     return [
       [[TRUE], TRUE],
       [[FALSE], FALSE],
@@ -570,7 +570,7 @@ class ConfigNamesMapperTest extends UnitTestCase {
    *   hasTranslatable() as the first value and the expected return value of
    *   ConfigNamesMapper::hasTranslatable() as the second value.
    */
-  public function providerTestHasTranslatable() {
+  public static function providerTestHasTranslatable() {
     return [
       [[], FALSE],
       [[TRUE], TRUE],
@@ -621,7 +621,7 @@ class ConfigNamesMapperTest extends UnitTestCase {
    *   hasTranslation() as the first value and the expected return value of
    *   ConfigNamesMapper::hasTranslation() as the second value.
    */
-  public function providerTestHasTranslation() {
+  public static function providerTestHasTranslation() {
     return [
       [[TRUE], TRUE],
       [[FALSE], FALSE],
diff --git a/core/modules/contact/tests/src/Kernel/Plugin/migrate/source/ContactCategoryTest.php b/core/modules/contact/tests/src/Kernel/Plugin/migrate/source/ContactCategoryTest.php
index 1ea9b337f239..c8f6fa86d3a6 100644
--- a/core/modules/contact/tests/src/Kernel/Plugin/migrate/source/ContactCategoryTest.php
+++ b/core/modules/contact/tests/src/Kernel/Plugin/migrate/source/ContactCategoryTest.php
@@ -20,7 +20,7 @@ class ContactCategoryTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/contact/tests/src/Kernel/Plugin/migrate/source/d6/ContactSettingsTest.php b/core/modules/contact/tests/src/Kernel/Plugin/migrate/source/d6/ContactSettingsTest.php
index 9c7952f74efb..18bdc577b440 100644
--- a/core/modules/contact/tests/src/Kernel/Plugin/migrate/source/d6/ContactSettingsTest.php
+++ b/core/modules/contact/tests/src/Kernel/Plugin/migrate/source/d6/ContactSettingsTest.php
@@ -20,7 +20,7 @@ class ContactSettingsTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     $tests[0]['source_data']['variable'] = [
diff --git a/core/modules/content_moderation/tests/src/Functional/ModerationActionsTest.php b/core/modules/content_moderation/tests/src/Functional/ModerationActionsTest.php
index c678595ab694..6efd560f2c88 100644
--- a/core/modules/content_moderation/tests/src/Functional/ModerationActionsTest.php
+++ b/core/modules/content_moderation/tests/src/Functional/ModerationActionsTest.php
@@ -102,7 +102,7 @@ class ModerationActionsTest extends BrowserTestBase {
    * @return array
    *   An array of test cases.
    */
-  public function nodeStatusActionsTestCases() {
+  public static function nodeStatusActionsTestCases() {
     return [
       'Moderated bundle shows warning (publish action)' => [
         'node_publish_action',
diff --git a/core/modules/content_moderation/tests/src/Functional/ViewsModerationStateFilterTest.php b/core/modules/content_moderation/tests/src/Functional/ViewsModerationStateFilterTest.php
index cdaae0d2e41f..97554b4427db 100644
--- a/core/modules/content_moderation/tests/src/Functional/ViewsModerationStateFilterTest.php
+++ b/core/modules/content_moderation/tests/src/Functional/ViewsModerationStateFilterTest.php
@@ -261,7 +261,7 @@ class ViewsModerationStateFilterTest extends ViewTestBase {
    * @return string[]
    *   An array of view IDs.
    */
-  public function providerTestWorkflowChanges() {
+  public static function providerTestWorkflowChanges() {
     return [
       'view on base table, filter on base table' => [
         'test_content_moderation_state_filter_base_table',
diff --git a/core/modules/content_moderation/tests/src/Kernel/ContentModerationPermissionsTest.php b/core/modules/content_moderation/tests/src/Kernel/ContentModerationPermissionsTest.php
index 8498d8d97668..e26ddcf5348a 100644
--- a/core/modules/content_moderation/tests/src/Kernel/ContentModerationPermissionsTest.php
+++ b/core/modules/content_moderation/tests/src/Kernel/ContentModerationPermissionsTest.php
@@ -48,7 +48,7 @@ class ContentModerationPermissionsTest extends KernelTestBase {
    * @return array
    *   Content moderation permissions based test cases.
    */
-  public function permissionsTestCases() {
+  public static function permissionsTestCases() {
     return [
       'Simple Content Moderation Workflow' => [
         [
diff --git a/core/modules/content_moderation/tests/src/Kernel/ContentModerationStateTest.php b/core/modules/content_moderation/tests/src/Kernel/ContentModerationStateTest.php
index 6317a1f4ec5d..0a9b692f0239 100644
--- a/core/modules/content_moderation/tests/src/Kernel/ContentModerationStateTest.php
+++ b/core/modules/content_moderation/tests/src/Kernel/ContentModerationStateTest.php
@@ -169,7 +169,7 @@ class ContentModerationStateTest extends KernelTestBase {
   /**
    * Test cases for basic moderation test.
    */
-  public function basicModerationTestCases() {
+  public static function basicModerationTestCases() {
     return [
       'Nodes' => [
         'node',
@@ -480,7 +480,7 @@ class ContentModerationStateTest extends KernelTestBase {
   /**
    * Test cases for ::testModerationWithSpecialLanguages().
    */
-  public function moderationWithSpecialLanguagesTestCases() {
+  public static function moderationWithSpecialLanguagesTestCases() {
     return [
       'Not specified to not specified' => [
         LanguageInterface::LANGCODE_NOT_SPECIFIED,
diff --git a/core/modules/content_moderation/tests/src/Kernel/EntityStateChangeValidationTest.php b/core/modules/content_moderation/tests/src/Kernel/EntityStateChangeValidationTest.php
index f2e74d743079..80ebf288c217 100644
--- a/core/modules/content_moderation/tests/src/Kernel/EntityStateChangeValidationTest.php
+++ b/core/modules/content_moderation/tests/src/Kernel/EntityStateChangeValidationTest.php
@@ -364,7 +364,7 @@ class EntityStateChangeValidationTest extends KernelTestBase {
   /**
    * Test cases for ::testTransitionAccessValidation.
    */
-  public function transitionAccessValidationTestCases() {
+  public static function transitionAccessValidationTestCases() {
     return [
       'Invalid transition, no permissions validated' => [
         [],
diff --git a/core/modules/content_moderation/tests/src/Kernel/EntityTypeInfoTest.php b/core/modules/content_moderation/tests/src/Kernel/EntityTypeInfoTest.php
index 6090269ac3a1..377908fff29c 100644
--- a/core/modules/content_moderation/tests/src/Kernel/EntityTypeInfoTest.php
+++ b/core/modules/content_moderation/tests/src/Kernel/EntityTypeInfoTest.php
@@ -98,7 +98,7 @@ class EntityTypeInfoTest extends KernelTestBase {
    *   - An entity type ID.
    *   - Whether the entity type is moderatable or not.
    */
-  public function providerTestEntityTypeAlter() {
+  public static function providerTestEntityTypeAlter() {
     $tests = [];
     $tests['non_internal_non_revisionable'] = ['entity_test', FALSE];
     $tests['non_internal_revisionable'] = ['entity_test_rev', TRUE];
diff --git a/core/modules/content_moderation/tests/src/Kernel/ModerationInformationTest.php b/core/modules/content_moderation/tests/src/Kernel/ModerationInformationTest.php
index 786e2b8924dc..b2b708594a2c 100644
--- a/core/modules/content_moderation/tests/src/Kernel/ModerationInformationTest.php
+++ b/core/modules/content_moderation/tests/src/Kernel/ModerationInformationTest.php
@@ -97,7 +97,7 @@ class ModerationInformationTest extends KernelTestBase {
   /**
    * Test cases for ::testIsDefaultRevisionPublished.
    */
-  public function isDefaultRevisionPublishedTestCases() {
+  public static function isDefaultRevisionPublishedTestCases() {
     return [
       'Draft to draft' => [
         'draft',
diff --git a/core/modules/content_moderation/tests/src/Kernel/ModerationStateFieldItemListTest.php b/core/modules/content_moderation/tests/src/Kernel/ModerationStateFieldItemListTest.php
index 25a32002e8bc..ac93ad291f97 100644
--- a/core/modules/content_moderation/tests/src/Kernel/ModerationStateFieldItemListTest.php
+++ b/core/modules/content_moderation/tests/src/Kernel/ModerationStateFieldItemListTest.php
@@ -213,7 +213,7 @@ class ModerationStateFieldItemListTest extends KernelTestBase {
   /**
    * Data provider for ::testModerationStateChanges.
    */
-  public function moderationStateChangesTestCases() {
+  public static function moderationStateChangesTestCases() {
     return [
       'Draft to draft' => [
         'draft',
@@ -298,7 +298,7 @@ class ModerationStateFieldItemListTest extends KernelTestBase {
   /**
    * Test cases for ::testEntityUnserialize.
    */
-  public function entityUnserializeTestCases() {
+  public static function entityUnserializeTestCases() {
     return [
       'Default draft state' => [
         'draft',
@@ -332,7 +332,7 @@ class ModerationStateFieldItemListTest extends KernelTestBase {
   /**
    * Tests cases for ::testModeratedEntityWithExistingId.
    */
-  public function moderatedEntityWithExistingIdTestCases() {
+  public static function moderatedEntityWithExistingIdTestCases() {
     return [
       'Draft non-default state' => [
         'draft',
diff --git a/core/modules/content_moderation/tests/src/Kernel/StateFormatterTest.php b/core/modules/content_moderation/tests/src/Kernel/StateFormatterTest.php
index 240af223463d..d8bc629e43f6 100644
--- a/core/modules/content_moderation/tests/src/Kernel/StateFormatterTest.php
+++ b/core/modules/content_moderation/tests/src/Kernel/StateFormatterTest.php
@@ -64,7 +64,7 @@ class StateFormatterTest extends KernelTestBase {
   /**
    * Test cases for testStateFieldFormatter().
    */
-  public function formatterTestCases() {
+  public static function formatterTestCases() {
     return [
       'Draft State' => [
         'draft',
diff --git a/core/modules/content_moderation/tests/src/Kernel/WorkspacesContentModerationStateTest.php b/core/modules/content_moderation/tests/src/Kernel/WorkspacesContentModerationStateTest.php
index 9f9776682e5d..9e4b59a3097b 100644
--- a/core/modules/content_moderation/tests/src/Kernel/WorkspacesContentModerationStateTest.php
+++ b/core/modules/content_moderation/tests/src/Kernel/WorkspacesContentModerationStateTest.php
@@ -155,7 +155,7 @@ class WorkspacesContentModerationStateTest extends ContentModerationStateTest {
   /**
    * Test cases for basic moderation test.
    */
-  public function basicModerationTestCases() {
+  public static function basicModerationTestCases() {
     return [
       'Nodes' => [
         'node',
diff --git a/core/modules/content_moderation/tests/src/Unit/ContentModerationRouteSubscriberTest.php b/core/modules/content_moderation/tests/src/Unit/ContentModerationRouteSubscriberTest.php
index 10970b448479..1c1a942d18aa 100644
--- a/core/modules/content_moderation/tests/src/Unit/ContentModerationRouteSubscriberTest.php
+++ b/core/modules/content_moderation/tests/src/Unit/ContentModerationRouteSubscriberTest.php
@@ -69,7 +69,7 @@ class ContentModerationRouteSubscriberTest extends UnitTestCase {
   /**
    * Data provider for ::testSetLatestRevisionFlag.
    */
-  public function setLatestRevisionFlagTestCases() {
+  public static function setLatestRevisionFlagTestCases() {
     return [
       'Entity parameter not on an entity form' => [
         [],
diff --git a/core/modules/content_moderation/tests/src/Unit/ContentPreprocessTest.php b/core/modules/content_moderation/tests/src/Unit/ContentPreprocessTest.php
index 0a12971d0dfc..7c8071b46e06 100644
--- a/core/modules/content_moderation/tests/src/Unit/ContentPreprocessTest.php
+++ b/core/modules/content_moderation/tests/src/Unit/ContentPreprocessTest.php
@@ -29,7 +29,7 @@ class ContentPreprocessTest extends UnitTestCase {
   /**
    * Data provider for self::testIsLatestVersionPage().
    */
-  public function routeNodeProvider() {
+  public static function routeNodeProvider() {
     return [
       ['entity.node.canonical', 1, 1, FALSE, 'Not on the latest version tab route.'],
       ['entity.node.latest_version', 1, 1, TRUE, 'On the latest version tab route, with the route node.'],
diff --git a/core/modules/content_moderation/tests/src/Unit/LatestRevisionCheckTest.php b/core/modules/content_moderation/tests/src/Unit/LatestRevisionCheckTest.php
index c384425e3e5e..3f094dc07003 100644
--- a/core/modules/content_moderation/tests/src/Unit/LatestRevisionCheckTest.php
+++ b/core/modules/content_moderation/tests/src/Unit/LatestRevisionCheckTest.php
@@ -105,7 +105,7 @@ class LatestRevisionCheckTest extends UnitTestCase {
   /**
    * Data provider for testLastAccessPermissions().
    */
-  public function accessSituationProvider() {
+  public static function accessSituationProvider() {
     return [
       // Node with global permissions and latest version.
       [Node::class, 'node', TRUE, ['view latest version', 'view any unpublished content'], FALSE, AccessResultAllowed::class],
diff --git a/core/modules/content_moderation/tests/src/Unit/ModerationInformationTest.php b/core/modules/content_moderation/tests/src/Unit/ModerationInformationTest.php
index 0d92309af9ae..f35b3b7f29ec 100644
--- a/core/modules/content_moderation/tests/src/Unit/ModerationInformationTest.php
+++ b/core/modules/content_moderation/tests/src/Unit/ModerationInformationTest.php
@@ -146,7 +146,7 @@ class ModerationInformationTest extends UnitTestCase {
   /**
    * Data provider for several tests.
    */
-  public function providerWorkflow() {
+  public static function providerWorkflow() {
     return [
       [NULL, FALSE],
       ['workflow', TRUE],
diff --git a/core/modules/content_moderation/tests/src/Unit/StateTransitionValidationTest.php b/core/modules/content_moderation/tests/src/Unit/StateTransitionValidationTest.php
index bb3141497593..b2aaaeee7827 100644
--- a/core/modules/content_moderation/tests/src/Unit/StateTransitionValidationTest.php
+++ b/core/modules/content_moderation/tests/src/Unit/StateTransitionValidationTest.php
@@ -98,7 +98,7 @@ class StateTransitionValidationTest extends UnitTestCase {
   /**
    * Data provider for the user transition test.
    */
-  public function userTransitionsProvider() {
+  public static function userTransitionsProvider() {
     // The user has the right permission, so let it through.
     $ret[] = ['draft', 'draft', 'use process transition draft', TRUE, TRUE];
 
diff --git a/core/modules/content_translation/tests/src/Kernel/ContentTranslationHandlerTest.php b/core/modules/content_translation/tests/src/Kernel/ContentTranslationHandlerTest.php
index 7d27abd9585c..000825ebdf57 100644
--- a/core/modules/content_translation/tests/src/Kernel/ContentTranslationHandlerTest.php
+++ b/core/modules/content_translation/tests/src/Kernel/ContentTranslationHandlerTest.php
@@ -134,7 +134,7 @@ class ContentTranslationHandlerTest extends KernelTestBase {
    *   An array of test cases, each one containing the element to alter, the
    *   form state, and the expected altered element.
    */
-  public function providerTestEntityFormSharedElements() {
+  public static function providerTestEntityFormSharedElements() {
     $tests = [];
 
     $element = [];
diff --git a/core/modules/content_translation/tests/src/Kernel/Plugin/migrate/source/d7/EntityTranslationSettingsTest.php b/core/modules/content_translation/tests/src/Kernel/Plugin/migrate/source/d7/EntityTranslationSettingsTest.php
index 7a25bf599da2..50c7e84e5eb7 100644
--- a/core/modules/content_translation/tests/src/Kernel/Plugin/migrate/source/d7/EntityTranslationSettingsTest.php
+++ b/core/modules/content_translation/tests/src/Kernel/Plugin/migrate/source/d7/EntityTranslationSettingsTest.php
@@ -25,7 +25,7 @@ class EntityTranslationSettingsTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // Source data when there's no entity type that uses entity translation.
diff --git a/core/modules/content_translation/tests/src/Unit/Menu/ContentTranslationLocalTasksTest.php b/core/modules/content_translation/tests/src/Unit/Menu/ContentTranslationLocalTasksTest.php
index a21d03fb5763..be57e9eb4458 100644
--- a/core/modules/content_translation/tests/src/Unit/Menu/ContentTranslationLocalTasksTest.php
+++ b/core/modules/content_translation/tests/src/Unit/Menu/ContentTranslationLocalTasksTest.php
@@ -55,7 +55,7 @@ class ContentTranslationLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function providerTestBlockAdminDisplay() {
+  public static function providerTestBlockAdminDisplay() {
     return [
       [
         'entity.node.canonical',
diff --git a/core/modules/contextual/tests/src/Kernel/ContextualUnitTest.php b/core/modules/contextual/tests/src/Kernel/ContextualUnitTest.php
index dc6cd8ef0fd2..418219627d2d 100644
--- a/core/modules/contextual/tests/src/Kernel/ContextualUnitTest.php
+++ b/core/modules/contextual/tests/src/Kernel/ContextualUnitTest.php
@@ -26,7 +26,7 @@ class ContextualUnitTest extends KernelTestBase {
    * @return array[]
    *   Test cases.
    */
-  public function contextualLinksDataProvider(): array {
+  public static function contextualLinksDataProvider(): array {
     $tests['one group, one dynamic path argument, no metadata'] = [
       [
         'node' => [
diff --git a/core/modules/datetime/tests/src/Kernel/DateTimeItemTest.php b/core/modules/datetime/tests/src/Kernel/DateTimeItemTest.php
index 5119e78b88b4..159b66797436 100644
--- a/core/modules/datetime/tests/src/Kernel/DateTimeItemTest.php
+++ b/core/modules/datetime/tests/src/Kernel/DateTimeItemTest.php
@@ -272,7 +272,7 @@ class DateTimeItemTest extends FieldKernelTestBase {
   /**
    * Provider for testDatetimeValidation().
    */
-  public function datetimeValidationProvider() {
+  public static function datetimeValidationProvider() {
     return [
       // Valid ISO 8601 dates, but unsupported by DateTimeItem.
       ['2014-01-01T20:00:00Z'],
@@ -332,7 +332,7 @@ class DateTimeItemTest extends FieldKernelTestBase {
   /**
    * Provider for testDatetimeValidation().
    */
-  public function dateOnlyValidationProvider() {
+  public static function dateOnlyValidationProvider() {
     return [
       // Valid date strings, but unsupported by DateTimeItem.
       ['Thu, 03 Nov 2014'],
diff --git a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php
index b5dc4b4f42b7..54833c375481 100644
--- a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php
+++ b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php
@@ -66,7 +66,7 @@ class DateFieldTest extends UnitTestCase {
   /**
    * Provides data for testDefineValueProcessPipeline().
    */
-  public function providerTestDefineValueProcessPipeline() {
+  public static function providerTestDefineValueProcessPipeline() {
     return [
       [['type' => 'date'], 'Y-m-d\TH:i:s', 'Y-m-d\TH:i:s'],
       [['type' => 'datestamp'], 'U', 'U'],
diff --git a/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php b/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php
index ec4c927676db..c0d1d0f403ea 100644
--- a/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php
+++ b/core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php
@@ -58,7 +58,7 @@ class StandardTest extends UnitTestCase {
    *
    * @see \Drupal\Tests\editor\Unit\editor\EditorXssFilter\StandardTest::testFilterXss()
    */
-  public function providerTestFilterXss() {
+  public static function providerTestFilterXss() {
     $data = [];
     $data[] = ['<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>', '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>'];
     $data[] = ['<p style="color:red">Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>', '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>'];
@@ -580,7 +580,7 @@ xss:ex/*XSS*//*/*/pression(alert("XSS"))\'>',
    *     - The assertion message.
    *     - (optional) The disallowed HTML tags to be passed to \Drupal\Component\Utility\Xss::filter().
    */
-  public function providerTestBlackListMode() {
+  public static function providerTestBlackListMode() {
     return [
       [
         '<unknown style="visibility:hidden">Pink Fairy Armadillo</unknown><video src="gerenuk.mp4"><script>alert(0)</script>',
diff --git a/core/modules/field/tests/src/Kernel/Number/NumberItemTest.php b/core/modules/field/tests/src/Kernel/Number/NumberItemTest.php
index 6d5f6b4a58a0..0ccef5319f8c 100644
--- a/core/modules/field/tests/src/Kernel/Number/NumberItemTest.php
+++ b/core/modules/field/tests/src/Kernel/Number/NumberItemTest.php
@@ -167,7 +167,7 @@ class NumberItemTest extends FieldKernelTestBase {
    * @return \Generator
    *   The test data.
    */
-  public function dataNumberFieldSettingsProvider() {
+  public static function dataNumberFieldSettingsProvider() {
     yield ['integer', NULL, NULL, -100, FALSE];
     yield ['integer', 0, NULL, -100, TRUE, 'field_integer: the value may be no less than 0.'];
     yield ['integer', 10, NULL, 100, FALSE];
@@ -243,7 +243,7 @@ class NumberItemTest extends FieldKernelTestBase {
    * @return \Generator
    *   The test data.
    */
-  public function dataTestMinMaxValue() {
+  public static function dataTestMinMaxValue() {
     yield [1, 10, 5, FALSE, ''];
     yield [10, 5, 6, TRUE, 'The minimum value must be less than or equal to 5.'];
     yield [1, 0, 6, TRUE, 'The minimum value must be less than or equal to 0.'];
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceLabelDescriptionTranslationTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceLabelDescriptionTranslationTest.php
index d718f11a5b21..9efb332628a0 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceLabelDescriptionTranslationTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceLabelDescriptionTranslationTest.php
@@ -26,7 +26,7 @@ class FieldInstanceLabelDescriptionTranslationTest extends MigrateSqlSourceTestB
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $test = [];
 
     // The source data.
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceOptionTranslationTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceOptionTranslationTest.php
index 3ec153949a4e..8abca1b4bc40 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceOptionTranslationTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceOptionTranslationTest.php
@@ -18,7 +18,7 @@ class FieldInstanceOptionTranslationTest extends FieldOptionTranslationTest {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $test = parent::providerSource();
 
     // FieldInstanceOptionTranslation extends FieldOptionTranslation so the
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstancePerFormDisplayTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstancePerFormDisplayTest.php
index 59900135c2d1..563619d937bf 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstancePerFormDisplayTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstancePerFormDisplayTest.php
@@ -22,7 +22,7 @@ class FieldInstancePerFormDisplayTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstancePerViewModeTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstancePerViewModeTest.php
index e46d00b15c10..6b0e91b80e33 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstancePerViewModeTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstancePerViewModeTest.php
@@ -20,7 +20,7 @@ class FieldInstancePerViewModeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceTest.php
index 2fd757f771a5..71c17a21d617 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldInstanceTest.php
@@ -20,7 +20,7 @@ class FieldInstanceTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldOptionTranslationTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldOptionTranslationTest.php
index 74f8b92ffdd2..fc52d119c557 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldOptionTranslationTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldOptionTranslationTest.php
@@ -22,7 +22,7 @@ class FieldOptionTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $test = [];
 
     // The source data.
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldTest.php
index e83d05e7c43c..97fbdf55744f 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d6/FieldTest.php
@@ -20,7 +20,7 @@ class FieldTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstanceLabelDescriptionTranslationTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstanceLabelDescriptionTranslationTest.php
index 8737c4e74696..a1e22b91ba6c 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstanceLabelDescriptionTranslationTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstanceLabelDescriptionTranslationTest.php
@@ -26,7 +26,7 @@ class FieldInstanceLabelDescriptionTranslationTest extends MigrateSqlSourceTestB
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $test = [];
 
     // The source data.
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstancePerFormDisplayTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstancePerFormDisplayTest.php
index 0482ce8afdbc..d44d6cd412f8 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstancePerFormDisplayTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstancePerFormDisplayTest.php
@@ -20,7 +20,7 @@ class FieldInstancePerFormDisplayTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstancePerViewModeTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstancePerViewModeTest.php
index 64c7d50ad9fa..d748f95a9a5d 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstancePerViewModeTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstancePerViewModeTest.php
@@ -20,7 +20,7 @@ class FieldInstancePerViewModeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstanceTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstanceTest.php
index 8cd031660311..bbbe5a5f249f 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstanceTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldInstanceTest.php
@@ -20,7 +20,7 @@ class FieldInstanceTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldOptionTranslationTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldOptionTranslationTest.php
index d317ae7e54df..3b13e4494156 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldOptionTranslationTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldOptionTranslationTest.php
@@ -22,7 +22,7 @@ class FieldOptionTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $test = [];
 
     // The source data.
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldTest.php
index ee3478f3caf0..839312bf057f 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/FieldTest.php
@@ -20,7 +20,7 @@ class FieldTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/ViewModeTest.php b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/ViewModeTest.php
index 15f6a4c5219a..a1fde03c4f90 100644
--- a/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/ViewModeTest.php
+++ b/core/modules/field/tests/src/Kernel/Plugin/migrate/source/d7/ViewModeTest.php
@@ -20,7 +20,7 @@ class ViewModeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/field/tests/src/Unit/FieldStorageConfigEntityUnitTest.php b/core/modules/field/tests/src/Unit/FieldStorageConfigEntityUnitTest.php
index 9cec8d16d89c..937d08810908 100644
--- a/core/modules/field/tests/src/Unit/FieldStorageConfigEntityUnitTest.php
+++ b/core/modules/field/tests/src/Unit/FieldStorageConfigEntityUnitTest.php
@@ -202,7 +202,7 @@ class FieldStorageConfigEntityUnitTest extends UnitTestCase {
    * @return array
    *   Test cases.
    */
-  public function providerInvalidEnforcedCardinality() {
+  public static function providerInvalidEnforcedCardinality() {
     return [
       'zero' => [0],
       'negative_other_than_-1' => [-70],
diff --git a/core/modules/field/tests/src/Unit/Plugin/migrate/process/ProcessFieldTest.php b/core/modules/field/tests/src/Unit/Plugin/migrate/process/ProcessFieldTest.php
index 4cf3a3fb4c73..1014e9f056cf 100644
--- a/core/modules/field/tests/src/Unit/Plugin/migrate/process/ProcessFieldTest.php
+++ b/core/modules/field/tests/src/Unit/Plugin/migrate/process/ProcessFieldTest.php
@@ -111,7 +111,7 @@ class ProcessFieldTest extends MigrateTestCase {
    *   - The MigrateException message to expect.
    *   - Whether the field plugin is not found.
    */
-  public function providerTestTransform() {
+  public static function providerTestTransform() {
     return [
       // Tests the getFieldType() method.
       [
diff --git a/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldInstanceSettingsTest.php b/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldInstanceSettingsTest.php
index e72ddecdbaea..06fa3e8f2110 100644
--- a/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldInstanceSettingsTest.php
+++ b/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldInstanceSettingsTest.php
@@ -44,7 +44,7 @@ class FieldInstanceSettingsTest extends UnitTestCase {
   /**
    * Provides field settings for testGetSettings().
    */
-  public function getSettingsProvider() {
+  public static function getSettingsProvider() {
     return [
       'imagefield size set' => [
         'imagefield_widget',
diff --git a/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldSettingsTest.php b/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldSettingsTest.php
index 657cfb327303..d8307276d19d 100644
--- a/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldSettingsTest.php
+++ b/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldSettingsTest.php
@@ -37,7 +37,7 @@ class FieldSettingsTest extends UnitTestCase {
   /**
    * Provides field settings for testGetSettings().
    */
-  public function getSettingsProvider() {
+  public static function getSettingsProvider() {
     return [
       [
         'list_integer',
diff --git a/core/modules/field_ui/tests/src/Functional/ManageFieldsMultipleTypesTest.php b/core/modules/field_ui/tests/src/Functional/ManageFieldsMultipleTypesTest.php
index 82ae6a6ded76..00b76df65fc4 100644
--- a/core/modules/field_ui/tests/src/Functional/ManageFieldsMultipleTypesTest.php
+++ b/core/modules/field_ui/tests/src/Functional/ManageFieldsMultipleTypesTest.php
@@ -138,7 +138,7 @@ class ManageFieldsMultipleTypesTest extends ManageFieldsFunctionalTestBase {
    * @return array
    *   Test cases.
    */
-  public function entityTypesProvider() {
+  public static function entityTypesProvider() {
     return [
       'node' => [
         'entity_type' => 'node',
diff --git a/core/modules/field_ui/tests/src/FunctionalJavascript/DisplayModeBundleSelectionTest.php b/core/modules/field_ui/tests/src/FunctionalJavascript/DisplayModeBundleSelectionTest.php
index a915f5da15c3..0c640f1215cf 100644
--- a/core/modules/field_ui/tests/src/FunctionalJavascript/DisplayModeBundleSelectionTest.php
+++ b/core/modules/field_ui/tests/src/FunctionalJavascript/DisplayModeBundleSelectionTest.php
@@ -143,7 +143,7 @@ class DisplayModeBundleSelectionTest extends WebDriverTestBase {
   /**
    * Data provider for testBundleSelection().
    */
-  public function providerBundleSelection() {
+  public static function providerBundleSelection() {
     return [
       'view display' => ['view', 'display', 'full'],
       'form display' => ['form', 'form-display', 'foobar'],
diff --git a/core/modules/field_ui/tests/src/Unit/FieldConfigEditFormTest.php b/core/modules/field_ui/tests/src/Unit/FieldConfigEditFormTest.php
index e9c3a14a3169..caef52e96180 100644
--- a/core/modules/field_ui/tests/src/Unit/FieldConfigEditFormTest.php
+++ b/core/modules/field_ui/tests/src/Unit/FieldConfigEditFormTest.php
@@ -52,7 +52,7 @@ class FieldConfigEditFormTest extends UnitTestCase {
   /**
    * Provides test cases with required and optional elements.
    */
-  public function providerRequired(): \Generator {
+  public static function providerRequired(): \Generator {
     yield 'required' => [
       [['#required' => TRUE]],
       TRUE,
diff --git a/core/modules/field_ui/tests/src/Unit/FieldUiTableTest.php b/core/modules/field_ui/tests/src/Unit/FieldUiTableTest.php
index 8ba2415b13e0..88b4c4da2fa8 100644
--- a/core/modules/field_ui/tests/src/Unit/FieldUiTableTest.php
+++ b/core/modules/field_ui/tests/src/Unit/FieldUiTableTest.php
@@ -25,7 +25,7 @@ class FieldUiTableTest extends UnitTestCase {
   /**
    * Provides test data for testReduceOrder().
    */
-  public function providerTestReduceOrder() {
+  public static function providerTestReduceOrder() {
     return [
       'Flat' => [
         'array' => [
diff --git a/core/modules/file/tests/src/Kernel/FileItemValidationTest.php b/core/modules/file/tests/src/Kernel/FileItemValidationTest.php
index 300658f70332..83b2efd54880 100644
--- a/core/modules/file/tests/src/Kernel/FileItemValidationTest.php
+++ b/core/modules/file/tests/src/Kernel/FileItemValidationTest.php
@@ -128,7 +128,7 @@ class FileItemValidationTest extends KernelTestBase {
   /**
    * Provides a list of file types to test.
    */
-  public function getFileTypes() {
+  public static function getFileTypes() {
     return [['file'], ['image']];
   }
 
diff --git a/core/modules/file/tests/src/Kernel/LegacyValidatorTest.php b/core/modules/file/tests/src/Kernel/LegacyValidatorTest.php
index 150438c41f23..357dcb357eb4 100644
--- a/core/modules/file/tests/src/Kernel/LegacyValidatorTest.php
+++ b/core/modules/file/tests/src/Kernel/LegacyValidatorTest.php
@@ -85,7 +85,7 @@ class LegacyValidatorTest extends FileManagedUnitTestBase {
    * @return array[][]
    *   The test cases.
    */
-  public function providerTestFileValidateExtensionsOnUri(): array {
+  public static function providerTestFileValidateExtensionsOnUri(): array {
     $temporary_txt_file_properties = [
       'filename' => 'asdf.txt',
       'uri' => 'temporary://asdf',
diff --git a/core/modules/file/tests/src/Kernel/Plugin/Validation/Constraint/FileExtensionConstraintValidatorTest.php b/core/modules/file/tests/src/Kernel/Plugin/Validation/Constraint/FileExtensionConstraintValidatorTest.php
index 7ca2ed039779..9347eb7f529f 100644
--- a/core/modules/file/tests/src/Kernel/Plugin/Validation/Constraint/FileExtensionConstraintValidatorTest.php
+++ b/core/modules/file/tests/src/Kernel/Plugin/Validation/Constraint/FileExtensionConstraintValidatorTest.php
@@ -50,7 +50,7 @@ class FileExtensionConstraintValidatorTest extends FileValidatorTestBase {
    * @return array[][]
    *   The test cases.
    */
-  public function providerTestFileValidateExtensionsOnUri(): array {
+  public static function providerTestFileValidateExtensionsOnUri(): array {
     $temporary_txt_file_properties = [
       'filename' => 'asdf.txt',
       'uri' => 'temporary://asdf',
diff --git a/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/FileTest.php b/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/FileTest.php
index f316f9035e1c..17619243a6a0 100644
--- a/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/FileTest.php
+++ b/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/FileTest.php
@@ -21,7 +21,7 @@ class FileTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/UploadInstanceTest.php b/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/UploadInstanceTest.php
index b9976ebbc4f0..ae7548607ff9 100644
--- a/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/UploadInstanceTest.php
+++ b/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/UploadInstanceTest.php
@@ -23,7 +23,7 @@ class UploadInstanceTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/UploadTest.php b/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/UploadTest.php
index ac41f4e24376..b6f5ded201fb 100644
--- a/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/UploadTest.php
+++ b/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d6/UploadTest.php
@@ -23,7 +23,7 @@ class UploadTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d7/FileTest.php b/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d7/FileTest.php
index 50b4d346d957..9a955d56e510 100644
--- a/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d7/FileTest.php
+++ b/core/modules/file/tests/src/Kernel/Plugin/migrate/source/d7/FileTest.php
@@ -20,7 +20,7 @@ class FileTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     $tests[0]['source_data']['file_managed'] = [
diff --git a/core/modules/file/tests/src/Kernel/Validation/UploadedFileValidatorTest.php b/core/modules/file/tests/src/Kernel/Validation/UploadedFileValidatorTest.php
index 78e2716bbfc5..45b1dbb7271a 100644
--- a/core/modules/file/tests/src/Kernel/Validation/UploadedFileValidatorTest.php
+++ b/core/modules/file/tests/src/Kernel/Validation/UploadedFileValidatorTest.php
@@ -103,7 +103,7 @@ class UploadedFileValidatorTest extends KernelTestBase {
   /**
    * Data provider for ::testValidateFail.
    */
-  public function validateProvider(): array {
+  public static function validateProvider(): array {
     return [
       'ini size' => [
         \UPLOAD_ERR_INI_SIZE,
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php
index 2e8e046dc558..0e9017cab235 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php
@@ -65,7 +65,7 @@ class FileFieldTest extends UnitTestCase {
   /**
    * Data provider for testGetFieldType().
    */
-  public function getFieldTypeProvider() {
+  public static function getFieldTypeProvider() {
     return [
       ['image', 'imagefield_widget'],
       ['file', 'filefield_widget'],
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php
index 10b3297c07c9..df8fc52a13c5 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php
@@ -70,7 +70,7 @@ class FileFieldTest extends UnitTestCase {
   /**
    * Data provider for testGetFieldType().
    */
-  public function getFieldTypeProvider() {
+  public static function getFieldTypeProvider() {
     return [
       ['image', 'imagefield_widget'],
       ['file', 'filefield_widget'],
diff --git a/core/modules/file/tests/src/Unit/SanitizeNameTest.php b/core/modules/file/tests/src/Unit/SanitizeNameTest.php
index 33b544f7bba2..a2c4d7e55da3 100644
--- a/core/modules/file/tests/src/Unit/SanitizeNameTest.php
+++ b/core/modules/file/tests/src/Unit/SanitizeNameTest.php
@@ -76,7 +76,7 @@ class SanitizeNameTest extends UnitTestCase {
    * @return array
    *   Arrays with original name, expected name, and sanitization options.
    */
-  public function provideFilenames() {
+  public static function provideFilenames() {
     return [
       'Test default options' => [
         'TÉXT-œ.txt',
diff --git a/core/modules/file/tests/src/Unit/Upload/ContentDispositionFilenameParserTest.php b/core/modules/file/tests/src/Unit/Upload/ContentDispositionFilenameParserTest.php
index 2d3545306b8a..237e470768e6 100644
--- a/core/modules/file/tests/src/Unit/Upload/ContentDispositionFilenameParserTest.php
+++ b/core/modules/file/tests/src/Unit/Upload/ContentDispositionFilenameParserTest.php
@@ -62,7 +62,7 @@ class ContentDispositionFilenameParserTest extends UnitTestCase {
   /**
    * A data provider for invalid headers.
    */
-  public function invalidHeaderProvider(): array {
+  public static function invalidHeaderProvider(): array {
     return [
       'multiple' => ['file; filename=""'],
       'empty' => ['filename=""'],
diff --git a/core/modules/filter/tests/src/Kernel/Plugin/migrate/process/FilterIdTest.php b/core/modules/filter/tests/src/Kernel/Plugin/migrate/process/FilterIdTest.php
index 49e54a859c6d..04dfe6818fa9 100644
--- a/core/modules/filter/tests/src/Kernel/Plugin/migrate/process/FilterIdTest.php
+++ b/core/modules/filter/tests/src/Kernel/Plugin/migrate/process/FilterIdTest.php
@@ -101,7 +101,7 @@ class FilterIdTest extends KernelTestBase {
    *   When $invalid_id is provided the transformation should fail with the
    *   supplied id.
    */
-  public function provideFilters() {
+  public static function provideFilters() {
     return [
       'filter ID mapped to plugin that exists' => [
         'foo',
diff --git a/core/modules/filter/tests/src/Kernel/Plugin/migrate/process/FilterSettingsTest.php b/core/modules/filter/tests/src/Kernel/Plugin/migrate/process/FilterSettingsTest.php
index 51592ee8b986..f9854b24cc87 100644
--- a/core/modules/filter/tests/src/Kernel/Plugin/migrate/process/FilterSettingsTest.php
+++ b/core/modules/filter/tests/src/Kernel/Plugin/migrate/process/FilterSettingsTest.php
@@ -44,7 +44,7 @@ class FilterSettingsTest extends MigrateTestCase {
    *
    * @return array
    */
-  public function dataProvider() {
+  public static function dataProvider() {
     return [
       // Tests that the transformed value is identical to the input value when
       // destination is not the filter_html.
diff --git a/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d6/FilterFormatTest.php b/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d6/FilterFormatTest.php
index 18448d1f6e3b..7e64934c0cc1 100644
--- a/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d6/FilterFormatTest.php
+++ b/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d6/FilterFormatTest.php
@@ -21,7 +21,7 @@ class FilterFormatTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d7/FilterFormatTest.php b/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d7/FilterFormatTest.php
index d2a2d48b5fbf..466a8a7da974 100644
--- a/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d7/FilterFormatTest.php
+++ b/core/modules/filter/tests/src/Kernel/Plugin/migrate/source/d7/FilterFormatTest.php
@@ -21,7 +21,7 @@ class FilterFormatTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/filter/tests/src/Unit/FilterHtmlTest.php b/core/modules/filter/tests/src/Unit/FilterHtmlTest.php
index 1c3e3f054d61..d020f1d0197a 100644
--- a/core/modules/filter/tests/src/Unit/FilterHtmlTest.php
+++ b/core/modules/filter/tests/src/Unit/FilterHtmlTest.php
@@ -52,7 +52,7 @@ class FilterHtmlTest extends UnitTestCase {
    * @return array
    *   An array of test data.
    */
-  public function providerFilterAttributes() {
+  public static function providerFilterAttributes() {
     return [
       ['<a href="/blog" title="Blog">Blog</a>', '<a href="/blog">Blog</a>'],
       ['<p dir="rtl" />', '<p dir="rtl"></p>'],
diff --git a/core/modules/filter/tests/src/Unit/FilterImageLazyLoadTest.php b/core/modules/filter/tests/src/Unit/FilterImageLazyLoadTest.php
index 847b3dcc5ff0..4b7f471879b7 100644
--- a/core/modules/filter/tests/src/Unit/FilterImageLazyLoadTest.php
+++ b/core/modules/filter/tests/src/Unit/FilterImageLazyLoadTest.php
@@ -46,7 +46,7 @@ final class FilterImageLazyLoadTest extends UnitTestCase {
    * @return array
    *   An array of test data.
    */
-  public function providerHtml(): array {
+  public static function providerHtml(): array {
     return [
       'lazy loading attribute already added' => [
         'input' => '<p><img src="foo.png" loading="lazy"></p>',
diff --git a/core/modules/image/tests/src/Functional/ImageFieldValidateTest.php b/core/modules/image/tests/src/Functional/ImageFieldValidateTest.php
index e7444aa0059c..1b882bd98d32 100644
--- a/core/modules/image/tests/src/Functional/ImageFieldValidateTest.php
+++ b/core/modules/image/tests/src/Functional/ImageFieldValidateTest.php
@@ -249,7 +249,7 @@ class ImageFieldValidateTest extends ImageFieldTestBase {
    * @return array
    *   Test cases.
    */
-  public function providerTestEmpty() {
+  public static function providerTestEmpty() {
     return [
       'optional-single' => ['field_image', FALSE, 1, 'files[field_image_0]', 'Article Article with edit-access-allowed image field has been created.', 'Article Article with edit-access-forbidden image field has been created.'],
       'optional-unlimited' => ['field_image', FALSE, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED, 'files[field_image_0][]', 'Article Article with edit-access-allowed image field has been created.', 'Article Article with edit-access-forbidden image field has been created.'],
diff --git a/core/modules/image/tests/src/Kernel/ImageStyleCustomStreamWrappersTest.php b/core/modules/image/tests/src/Kernel/ImageStyleCustomStreamWrappersTest.php
index 2e7759a41f2d..2e79a71272b6 100644
--- a/core/modules/image/tests/src/Kernel/ImageStyleCustomStreamWrappersTest.php
+++ b/core/modules/image/tests/src/Kernel/ImageStyleCustomStreamWrappersTest.php
@@ -102,7 +102,7 @@ class ImageStyleCustomStreamWrappersTest extends KernelTestBase {
    *   - The derivative expected stream wrapper scheme.
    *   - The stream wrapper service class.
    */
-  public function providerTestCustomStreamWrappers() {
+  public static function providerTestCustomStreamWrappers() {
     return [
       ['public', 'public', PublicStream::class],
       ['private', 'private', PrivateStream::class],
diff --git a/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d6/ImageCachePresetTest.php b/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d6/ImageCachePresetTest.php
index 80d8b541981f..6aea58177783 100644
--- a/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d6/ImageCachePresetTest.php
+++ b/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d6/ImageCachePresetTest.php
@@ -23,7 +23,7 @@ class ImageCachePresetTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d7/ImageStylesTest.php b/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d7/ImageStylesTest.php
index df88fb0f467c..906d197ce3c3 100644
--- a/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d7/ImageStylesTest.php
+++ b/core/modules/image/tests/src/Kernel/Plugin/migrate/source/d7/ImageStylesTest.php
@@ -23,7 +23,7 @@ class ImageStylesTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/image/tests/src/Unit/PageCache/DenyPrivateImageStyleDownloadTest.php b/core/modules/image/tests/src/Unit/PageCache/DenyPrivateImageStyleDownloadTest.php
index ecdff2372f8c..eb6866f17384 100644
--- a/core/modules/image/tests/src/Unit/PageCache/DenyPrivateImageStyleDownloadTest.php
+++ b/core/modules/image/tests/src/Unit/PageCache/DenyPrivateImageStyleDownloadTest.php
@@ -77,7 +77,7 @@ class DenyPrivateImageStyleDownloadTest extends UnitTestCase {
    * @return array
    *   Data and expected results.
    */
-  public function providerPrivateImageStyleDownloadPolicy() {
+  public static function providerPrivateImageStyleDownloadPolicy() {
     return [
       [ResponsePolicyInterface::DENY, 'image.style_private'],
       [NULL, 'some.other.route'],
diff --git a/core/modules/jsonapi/tests/src/Functional/ExternalNormalizersTest.php b/core/modules/jsonapi/tests/src/Functional/ExternalNormalizersTest.php
index 1963cb02b9ea..924bd6dab38a 100644
--- a/core/modules/jsonapi/tests/src/Functional/ExternalNormalizersTest.php
+++ b/core/modules/jsonapi/tests/src/Functional/ExternalNormalizersTest.php
@@ -182,7 +182,7 @@ class ExternalNormalizersTest extends BrowserTestBase {
    * @return array
    *   Test cases.
    */
-  public function providerTestFormatAgnosticNormalizers() {
+  public static function providerTestFormatAgnosticNormalizers() {
     return [
       'Format-agnostic @FieldType-level normalizers SHOULD NOT be able to affect the JSON:API normalization' => [
         'jsonapi_test_field_type',
diff --git a/core/modules/jsonapi/tests/src/Functional/TermTest.php b/core/modules/jsonapi/tests/src/Functional/TermTest.php
index 5a56f19b1b2a..bebe37dda40c 100644
--- a/core/modules/jsonapi/tests/src/Functional/TermTest.php
+++ b/core/modules/jsonapi/tests/src/Functional/TermTest.php
@@ -484,7 +484,7 @@ class TermTest extends ResourceTestBase {
   /**
    * Data provider for ::testGetIndividualTermWithParent().
    */
-  public function providerTestGetIndividualTermWithParent() {
+  public static function providerTestGetIndividualTermWithParent() {
     return [
       'root parent: [0] (= no parent)' => [
         [0],
diff --git a/core/modules/jsonapi/tests/src/Kernel/Context/FieldResolverTest.php b/core/modules/jsonapi/tests/src/Kernel/Context/FieldResolverTest.php
index f53992897980..7393e99b183e 100644
--- a/core/modules/jsonapi/tests/src/Kernel/Context/FieldResolverTest.php
+++ b/core/modules/jsonapi/tests/src/Kernel/Context/FieldResolverTest.php
@@ -96,7 +96,7 @@ class FieldResolverTest extends JsonapiKernelTestBase {
   /**
    * Provides test cases for resolveInternalEntityQueryPath.
    */
-  public function resolveInternalIncludePathProvider() {
+  public static function resolveInternalIncludePathProvider() {
     return [
       'entity reference' => [[['field_test_ref2']], 'field_test_ref2'],
       'entity reference with multi target bundles' => [[['field_test_ref1']], 'field_test_ref1'],
@@ -142,7 +142,7 @@ class FieldResolverTest extends JsonapiKernelTestBase {
   /**
    * Provides test cases for ::testResolveInternalIncludePathError.
    */
-  public function resolveInternalIncludePathErrorProvider() {
+  public static function resolveInternalIncludePathErrorProvider() {
     return [
       // Should fail because none of these bundles have these fields.
       ['entity_test_with_bundle', 'bundle1', 'host.fail!!.deep'],
@@ -180,7 +180,7 @@ class FieldResolverTest extends JsonapiKernelTestBase {
   /**
    * Provides test cases for ::testResolveInternalEntityQueryPath.
    */
-  public function resolveInternalEntityQueryPathProvider() {
+  public static function resolveInternalEntityQueryPathProvider() {
     return [
       'config entity as base' => [
         'uuid', 'id', 'entity_test_bundle', 'entity_test_bundle',
@@ -265,7 +265,7 @@ class FieldResolverTest extends JsonapiKernelTestBase {
   /**
    * Provides test cases for ::testResolveInternalEntityQueryPathError.
    */
-  public function resolveInternalEntityQueryPathErrorProvider() {
+  public static function resolveInternalEntityQueryPathErrorProvider() {
     return [
       'nested fields' => [
         'entity_test_with_bundle', 'bundle1', 'none.of.these.exist',
diff --git a/core/modules/jsonapi/tests/src/Kernel/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php b/core/modules/jsonapi/tests/src/Kernel/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php
index 41f32c9bf37c..f9a022b3497e 100644
--- a/core/modules/jsonapi/tests/src/Kernel/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php
+++ b/core/modules/jsonapi/tests/src/Kernel/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php
@@ -776,7 +776,7 @@ class JsonApiDocumentTopLevelNormalizerTest extends JsonapiKernelTestBase {
   /**
    * Provides test cases for asserting cacheable metadata behavior.
    */
-  public function testCacheableMetadataProvider() {
+  public static function testCacheableMetadataProvider() {
     $cacheable_metadata = function ($metadata) {
       return CacheableMetadata::createFromRenderArray(['#cache' => $metadata]);
     };
diff --git a/core/modules/jsonapi/tests/src/Kernel/Normalizer/LinkCollectionNormalizerTest.php b/core/modules/jsonapi/tests/src/Kernel/Normalizer/LinkCollectionNormalizerTest.php
index 305a7309b7bd..02cb357ac69e 100644
--- a/core/modules/jsonapi/tests/src/Kernel/Normalizer/LinkCollectionNormalizerTest.php
+++ b/core/modules/jsonapi/tests/src/Kernel/Normalizer/LinkCollectionNormalizerTest.php
@@ -168,7 +168,7 @@ class LinkCollectionNormalizerTest extends KernelTestBase {
    *
    * @return array[]
    */
-  public function linkAccessTestData() {
+  public static function linkAccessTestData() {
     return [
       'the edit-form link is present because uid 2 has access to the targeted resource (its own edit form)' => [
         'uid' => 2,
diff --git a/core/modules/jsonapi/tests/src/Kernel/Normalizer/RelationshipNormalizerTest.php b/core/modules/jsonapi/tests/src/Kernel/Normalizer/RelationshipNormalizerTest.php
index f27dbed31591..f575410c92cf 100644
--- a/core/modules/jsonapi/tests/src/Kernel/Normalizer/RelationshipNormalizerTest.php
+++ b/core/modules/jsonapi/tests/src/Kernel/Normalizer/RelationshipNormalizerTest.php
@@ -262,7 +262,7 @@ class RelationshipNormalizerTest extends JsonapiKernelTestBase {
   /**
    * Data provider for testNormalize.
    */
-  public function normalizeProvider() {
+  public static function normalizeProvider() {
     return [
       'single cardinality' => [
         ['user1'],
diff --git a/core/modules/jsonapi/tests/src/Kernel/Query/FilterTest.php b/core/modules/jsonapi/tests/src/Kernel/Query/FilterTest.php
index b271cb687552..5dde622981a1 100644
--- a/core/modules/jsonapi/tests/src/Kernel/Query/FilterTest.php
+++ b/core/modules/jsonapi/tests/src/Kernel/Query/FilterTest.php
@@ -327,7 +327,7 @@ class FilterTest extends JsonapiKernelTestBase {
   /**
    * Data provider for testCreateFromQueryParameter.
    */
-  public function parameterProvider() {
+  public static function parameterProvider() {
     return [
       'shorthand' => [
         ['uid' => ['value' => 1]],
diff --git a/core/modules/jsonapi/tests/src/Kernel/ResourceType/RelatedResourceTypesTest.php b/core/modules/jsonapi/tests/src/Kernel/ResourceType/RelatedResourceTypesTest.php
index 5ee39d67366b..75f75a0f3b33 100644
--- a/core/modules/jsonapi/tests/src/Kernel/ResourceType/RelatedResourceTypesTest.php
+++ b/core/modules/jsonapi/tests/src/Kernel/ResourceType/RelatedResourceTypesTest.php
@@ -144,7 +144,7 @@ class RelatedResourceTypesTest extends JsonapiKernelTestBase {
    * @covers ::getRelatableResourceTypes
    * @dataProvider getRelatableResourceTypesProvider
    */
-  public function getRelatableResourceTypesProvider() {
+  public static function getRelatableResourceTypesProvider() {
     return [
       [
         'node--foo',
@@ -174,7 +174,7 @@ class RelatedResourceTypesTest extends JsonapiKernelTestBase {
   /**
    * Provides cases to test getRelatableTypesByField.
    */
-  public function getRelatableResourceTypesByFieldProvider() {
+  public static function getRelatableResourceTypesByFieldProvider() {
     return [
       ['node', 'foo', 'field_ref_foo'],
       ['node', 'foo', 'field_ref_bar'],
diff --git a/core/modules/jsonapi/tests/src/Kernel/ResourceType/ResourceTypeRepositoryTest.php b/core/modules/jsonapi/tests/src/Kernel/ResourceType/ResourceTypeRepositoryTest.php
index e9820e1a08f1..5207ede69e41 100644
--- a/core/modules/jsonapi/tests/src/Kernel/ResourceType/ResourceTypeRepositoryTest.php
+++ b/core/modules/jsonapi/tests/src/Kernel/ResourceType/ResourceTypeRepositoryTest.php
@@ -97,7 +97,7 @@ class ResourceTypeRepositoryTest extends JsonapiKernelTestBase {
    * @return array
    *   The data for the test method.
    */
-  public function getProvider() {
+  public static function getProvider() {
     return [
       ['node', 'article', 'Drupal\node\Entity\Node'],
       ['node', '42', 'Drupal\node\Entity\Node'],
@@ -147,7 +147,7 @@ class ResourceTypeRepositoryTest extends JsonapiKernelTestBase {
    * @return array
    *   The data for the test method.
    */
-  public function getFieldsProvider() {
+  public static function getFieldsProvider() {
     return [
       [['type', 'node_type']],
       [['id', 'node_id']],
diff --git a/core/modules/jsonapi/tests/src/Unit/EventSubscriber/ResourceResponseValidatorTest.php b/core/modules/jsonapi/tests/src/Unit/EventSubscriber/ResourceResponseValidatorTest.php
index 5875ebc06c74..7ca219a3e417 100644
--- a/core/modules/jsonapi/tests/src/Unit/EventSubscriber/ResourceResponseValidatorTest.php
+++ b/core/modules/jsonapi/tests/src/Unit/EventSubscriber/ResourceResponseValidatorTest.php
@@ -72,7 +72,7 @@ class ResourceResponseValidatorTest extends UnitTestCase {
    * @return array
    *   An array of test cases.
    */
-  public function validateResponseProvider() {
+  public static function validateResponseProvider() {
     $defaults = [
       'route_name' => 'jsonapi.node--article.individual',
       'resource_type' => new ResourceType('node', 'article', NULL),
diff --git a/core/modules/jsonapi/tests/src/Unit/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php b/core/modules/jsonapi/tests/src/Unit/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php
index e88a8d29b62d..da5d2aeb44d7 100644
--- a/core/modules/jsonapi/tests/src/Unit/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php
+++ b/core/modules/jsonapi/tests/src/Unit/Normalizer/JsonApiDocumentTopLevelNormalizerTest.php
@@ -103,7 +103,7 @@ class JsonApiDocumentTopLevelNormalizerTest extends UnitTestCase {
    * @return array
    *   The data for the test method.
    */
-  public function denormalizeProvider() {
+  public static function denormalizeProvider() {
     return [
       [
         [
@@ -240,7 +240,7 @@ class JsonApiDocumentTopLevelNormalizerTest extends UnitTestCase {
   /**
    * Provides test cases for testDenormalizeUuid.
    */
-  public function denormalizeUuidProvider() {
+  public static function denormalizeUuidProvider() {
     return [
       'valid' => ['76dd5c18-ea1b-4150-9e75-b21958a2b836', FALSE],
       'missing' => [NULL, FALSE],
diff --git a/core/modules/jsonapi/tests/src/Unit/Normalizer/ResourceIdentifierNormalizerTest.php b/core/modules/jsonapi/tests/src/Unit/Normalizer/ResourceIdentifierNormalizerTest.php
index 4b15495a0975..fc78271bf3b3 100644
--- a/core/modules/jsonapi/tests/src/Unit/Normalizer/ResourceIdentifierNormalizerTest.php
+++ b/core/modules/jsonapi/tests/src/Unit/Normalizer/ResourceIdentifierNormalizerTest.php
@@ -128,7 +128,7 @@ class ResourceIdentifierNormalizerTest extends UnitTestCase {
    * @return array
    *   The data for the test method.
    */
-  public function denormalizeProvider() {
+  public static function denormalizeProvider() {
     return [
       [
         ['data' => [['type' => 'lorem--dummy_bundle', 'id' => '4e6cb61d-4f04-437f-99fe-42c002393658']]],
@@ -168,7 +168,7 @@ class ResourceIdentifierNormalizerTest extends UnitTestCase {
    * @return array
    *   The input data for the test method.
    */
-  public function denormalizeInvalidResourceProvider() {
+  public static function denormalizeInvalidResourceProvider() {
     return [
       [
         [
diff --git a/core/modules/jsonapi/tests/src/Unit/Query/EntityConditionGroupTest.php b/core/modules/jsonapi/tests/src/Unit/Query/EntityConditionGroupTest.php
index 2cc50c559dc8..5544e70012e0 100644
--- a/core/modules/jsonapi/tests/src/Unit/Query/EntityConditionGroupTest.php
+++ b/core/modules/jsonapi/tests/src/Unit/Query/EntityConditionGroupTest.php
@@ -41,7 +41,7 @@ class EntityConditionGroupTest extends UnitTestCase {
   /**
    * Data provider for testConstruct.
    */
-  public function constructProvider() {
+  public static function constructProvider() {
     return [
       [['conjunction' => 'AND', 'members' => []]],
       [['conjunction' => 'OR', 'members' => []]],
diff --git a/core/modules/jsonapi/tests/src/Unit/Query/EntityConditionTest.php b/core/modules/jsonapi/tests/src/Unit/Query/EntityConditionTest.php
index 9ea56e57056d..adea6af9f0de 100644
--- a/core/modules/jsonapi/tests/src/Unit/Query/EntityConditionTest.php
+++ b/core/modules/jsonapi/tests/src/Unit/Query/EntityConditionTest.php
@@ -49,7 +49,7 @@ class EntityConditionTest extends UnitTestCase {
   /**
    * Data provider for testDenormalize.
    */
-  public function queryParameterProvider() {
+  public static function queryParameterProvider() {
     return [
       [['path' => 'some_field', 'value' => NULL, 'operator' => '=']],
       [['path' => 'some_field', 'operator' => '=', 'value' => 'some_string']],
@@ -87,7 +87,7 @@ class EntityConditionTest extends UnitTestCase {
   /**
    * Data provider for testValidation.
    */
-  public function validationProvider() {
+  public static function validationProvider() {
     return [
       [['path' => 'some_field', 'value' => 'some_value'], NULL],
       [
diff --git a/core/modules/jsonapi/tests/src/Unit/Query/OffsetPageTest.php b/core/modules/jsonapi/tests/src/Unit/Query/OffsetPageTest.php
index af1b3292bd96..264d3bd7f615 100644
--- a/core/modules/jsonapi/tests/src/Unit/Query/OffsetPageTest.php
+++ b/core/modules/jsonapi/tests/src/Unit/Query/OffsetPageTest.php
@@ -46,7 +46,7 @@ class OffsetPageTest extends UnitTestCase {
   /**
    * Data provider for testCreateFromQueryParameter.
    */
-  public function parameterProvider() {
+  public static function parameterProvider() {
     return [
       [['offset' => 12, 'limit' => 20], ['offset' => 12, 'limit' => 20]],
       [['offset' => 12, 'limit' => 60], ['offset' => 12, 'limit' => 50]],
diff --git a/core/modules/jsonapi/tests/src/Unit/Query/SortTest.php b/core/modules/jsonapi/tests/src/Unit/Query/SortTest.php
index 5aa88a11c71e..14b3faa9f52b 100644
--- a/core/modules/jsonapi/tests/src/Unit/Query/SortTest.php
+++ b/core/modules/jsonapi/tests/src/Unit/Query/SortTest.php
@@ -49,7 +49,7 @@ class SortTest extends UnitTestCase {
   /**
    * Provides a suite of shortcut sort parameters and their expected expansions.
    */
-  public function parameterProvider() {
+  public static function parameterProvider() {
     return [
       ['lorem', [['path' => 'lorem', 'direction' => 'ASC', 'langcode' => NULL]]],
       [
@@ -93,7 +93,7 @@ class SortTest extends UnitTestCase {
   /**
    * Data provider for testCreateFromQueryParameterFail.
    */
-  public function badParameterProvider() {
+  public static function badParameterProvider() {
     return [
       [[['lorem']]],
       [''],
diff --git a/core/modules/jsonapi/tests/src/Unit/Routing/RoutesTest.php b/core/modules/jsonapi/tests/src/Unit/Routing/RoutesTest.php
index 5ea0022b5318..59000936c3ef 100644
--- a/core/modules/jsonapi/tests/src/Unit/Routing/RoutesTest.php
+++ b/core/modules/jsonapi/tests/src/Unit/Routing/RoutesTest.php
@@ -198,7 +198,7 @@ class RoutesTest extends UnitTestCase {
   /**
    * Lists routes which should have been created.
    */
-  public function expectedRoutes() {
+  public static function expectedRoutes() {
     return [
       ['jsonapi.entity_type_1--bundle_1_1.individual'],
       ['jsonapi.entity_type_1--bundle_1_1.collection'],
@@ -232,7 +232,7 @@ class RoutesTest extends UnitTestCase {
   /**
    * Lists routes which should have been created.
    */
-  public function notExpectedRoutes() {
+  public static function notExpectedRoutes() {
     return [
       ['jsonapi.entity_type_2--bundle_2_1.individual'],
       ['jsonapi.entity_type_2--bundle_2_1.collection'],
diff --git a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/LanguageTest.php b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/LanguageTest.php
index d04b57af5b95..31d486850212 100644
--- a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/LanguageTest.php
+++ b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/LanguageTest.php
@@ -20,7 +20,7 @@ class LanguageTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentSettingsTest.php b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentSettingsTest.php
index f4fa2dacce00..939edc14acae 100644
--- a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentSettingsTest.php
+++ b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentSettingsTest.php
@@ -21,7 +21,7 @@ class LanguageContentSettingsTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentTaxonomyVocabularySettingsTest.php b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentTaxonomyVocabularySettingsTest.php
index b7cb2b5f2cc1..9631ebe62567 100644
--- a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentTaxonomyVocabularySettingsTest.php
+++ b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentTaxonomyVocabularySettingsTest.php
@@ -21,7 +21,7 @@ class LanguageContentTaxonomyVocabularySettingsTest extends MigrateSqlSourceTest
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d7/LanguageContentSettingsTest.php b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d7/LanguageContentSettingsTest.php
index 3fc1df57c334..5489164813bc 100644
--- a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d7/LanguageContentSettingsTest.php
+++ b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d7/LanguageContentSettingsTest.php
@@ -21,7 +21,7 @@ class LanguageContentSettingsTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d7/LanguageContentTaxonomyVocabularySettingsTest.php b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d7/LanguageContentTaxonomyVocabularySettingsTest.php
index c681cd1082a5..f48f336de589 100644
--- a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d7/LanguageContentTaxonomyVocabularySettingsTest.php
+++ b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d7/LanguageContentTaxonomyVocabularySettingsTest.php
@@ -21,7 +21,7 @@ class LanguageContentTaxonomyVocabularySettingsTest extends VocabularyTest {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     // Get the source data from parent.
     $tests = parent::providerSource();
 
diff --git a/core/modules/language/tests/src/Unit/ContentLanguageSettingsUnitTest.php b/core/modules/language/tests/src/Unit/ContentLanguageSettingsUnitTest.php
index 960730908f18..82bace1834e0 100644
--- a/core/modules/language/tests/src/Unit/ContentLanguageSettingsUnitTest.php
+++ b/core/modules/language/tests/src/Unit/ContentLanguageSettingsUnitTest.php
@@ -180,7 +180,7 @@ class ContentLanguageSettingsUnitTest extends UnitTestCase {
     $this->assertSame($expected, $config->isLanguageAlterable());
   }
 
-  public function providerLanguageAlterable() {
+  public static function providerLanguageAlterable() {
     $alterableConfig = new ContentLanguageSettings([
       'target_entity_type_id' => 'test_entity_type',
       'target_bundle' => 'test_bundle',
diff --git a/core/modules/language/tests/src/Unit/LanguageNegotiationUrlTest.php b/core/modules/language/tests/src/Unit/LanguageNegotiationUrlTest.php
index 8eaf87478dda..5cea18f24ed6 100644
--- a/core/modules/language/tests/src/Unit/LanguageNegotiationUrlTest.php
+++ b/core/modules/language/tests/src/Unit/LanguageNegotiationUrlTest.php
@@ -113,7 +113,7 @@ class LanguageNegotiationUrlTest extends UnitTestCase {
    * @return array
    *   An array of data for checking path prefix negotiation.
    */
-  public function providerTestPathPrefix() {
+  public static function providerTestPathPrefix() {
     $path_prefix_configuration[] = [
       'prefix' => 'de',
       'prefixes' => [
@@ -214,7 +214,7 @@ class LanguageNegotiationUrlTest extends UnitTestCase {
    *   An array of data for checking path prefix negotiation for neutral
    *   languages.
    */
-  public function providerNeutralLanguages() {
+  public static function providerNeutralLanguages() {
     return [
       [LanguageInterface::LANGCODE_NOT_APPLICABLE, NULL],
       [LanguageInterface::LANGCODE_NOT_SPECIFIED, 'en'],
@@ -263,7 +263,7 @@ class LanguageNegotiationUrlTest extends UnitTestCase {
    * @return array
    *   An array of data for checking domain negotiation.
    */
-  public function providerTestDomain() {
+  public static function providerTestDomain() {
 
     $domain_configuration[] = [
       'http_host' => 'example.de',
diff --git a/core/modules/language/tests/src/Unit/Menu/LanguageLocalTasksTest.php b/core/modules/language/tests/src/Unit/Menu/LanguageLocalTasksTest.php
index c246618cfb13..f69026f7f984 100644
--- a/core/modules/language/tests/src/Unit/Menu/LanguageLocalTasksTest.php
+++ b/core/modules/language/tests/src/Unit/Menu/LanguageLocalTasksTest.php
@@ -35,7 +35,7 @@ class LanguageLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getLanguageAdminOverviewRoutes() {
+  public static function getLanguageAdminOverviewRoutes() {
     return [
       ['entity.configurable_language.collection', [['entity.configurable_language.collection', 'language.negotiation']]],
       ['language.negotiation', [['entity.configurable_language.collection', 'language.negotiation']]],
diff --git a/core/modules/layout_builder/tests/src/Functional/LayoutBuilderAccessTest.php b/core/modules/layout_builder/tests/src/Functional/LayoutBuilderAccessTest.php
index 24983d439d6d..bb8132343743 100644
--- a/core/modules/layout_builder/tests/src/Functional/LayoutBuilderAccessTest.php
+++ b/core/modules/layout_builder/tests/src/Functional/LayoutBuilderAccessTest.php
@@ -141,7 +141,7 @@ class LayoutBuilderAccessTest extends BrowserTestBase {
   /**
    * Provides test data for ::testAccessWithBundles().
    */
-  public function providerTestAccessWithBundles() {
+  public static function providerTestAccessWithBundles() {
     // Data provider values are:
     // - the permissions to grant to the user
     // - whether access is expected for the defaults
@@ -235,7 +235,7 @@ class LayoutBuilderAccessTest extends BrowserTestBase {
   /**
    * Provides test data for ::testAccessWithoutBundles().
    */
-  public function providerTestAccessWithoutBundles() {
+  public static function providerTestAccessWithoutBundles() {
     // Data provider values are:
     // - the permissions to grant to the user
     // - whether access is expected for the defaults
diff --git a/core/modules/layout_builder/tests/src/Functional/LayoutSectionTest.php b/core/modules/layout_builder/tests/src/Functional/LayoutSectionTest.php
index f04478f8b008..f575bc85b728 100644
--- a/core/modules/layout_builder/tests/src/Functional/LayoutSectionTest.php
+++ b/core/modules/layout_builder/tests/src/Functional/LayoutSectionTest.php
@@ -59,7 +59,7 @@ class LayoutSectionTest extends BrowserTestBase {
   /**
    * Provides test data for ::testLayoutSectionFormatter().
    */
-  public function providerTestLayoutSectionFormatter() {
+  public static function providerTestLayoutSectionFormatter() {
     $data = [];
     $data['block_with_global_context'] = [
       [
diff --git a/core/modules/layout_builder/tests/src/FunctionalJavascript/InlineBlockTest.php b/core/modules/layout_builder/tests/src/FunctionalJavascript/InlineBlockTest.php
index 75b465d1a263..b76512c84974 100644
--- a/core/modules/layout_builder/tests/src/FunctionalJavascript/InlineBlockTest.php
+++ b/core/modules/layout_builder/tests/src/FunctionalJavascript/InlineBlockTest.php
@@ -186,7 +186,7 @@ class InlineBlockTest extends InlineBlockTestBase {
   /**
    * Provides test data for ::testNoLayoutSave().
    */
-  public function layoutNoSaveProvider() {
+  public static function layoutNoSaveProvider() {
     return [
       'discard_changes' => [
         'discard_changes',
diff --git a/core/modules/layout_builder/tests/src/Kernel/DefaultsSectionStorageTest.php b/core/modules/layout_builder/tests/src/Kernel/DefaultsSectionStorageTest.php
index 864d0df00d1e..e749f3564321 100644
--- a/core/modules/layout_builder/tests/src/Kernel/DefaultsSectionStorageTest.php
+++ b/core/modules/layout_builder/tests/src/Kernel/DefaultsSectionStorageTest.php
@@ -109,7 +109,7 @@ class DefaultsSectionStorageTest extends KernelTestBase {
   /**
    * Provides test data for ::testAccess().
    */
-  public function providerTestAccess() {
+  public static function providerTestAccess() {
     $section_data = [
       new Section(
         'layout_onecol',
diff --git a/core/modules/layout_builder/tests/src/Kernel/FieldBlockTest.php b/core/modules/layout_builder/tests/src/Kernel/FieldBlockTest.php
index 605006f12d06..24a45c9628e4 100644
--- a/core/modules/layout_builder/tests/src/Kernel/FieldBlockTest.php
+++ b/core/modules/layout_builder/tests/src/Kernel/FieldBlockTest.php
@@ -75,7 +75,7 @@ class FieldBlockTest extends EntityKernelTestBase {
   /**
    * Provides test data for ::testBlockAccessEntityNotAllowed().
    */
-  public function providerTestBlockAccessNotAllowed() {
+  public static function providerTestBlockAccessNotAllowed() {
     $data = [];
     $data['entity_forbidden'] = [
       FALSE,
@@ -176,7 +176,7 @@ class FieldBlockTest extends EntityKernelTestBase {
   /**
    * Provides test data for ::testBlockAccessEntityAllowedFieldHasValue().
    */
-  public function providerTestBlockAccessEntityAllowedFieldHasValue() {
+  public static function providerTestBlockAccessEntityAllowedFieldHasValue() {
     $data = [];
     $data['empty'] = [
       FALSE,
@@ -282,7 +282,7 @@ class FieldBlockTest extends EntityKernelTestBase {
   /**
    * Provides test data for ::testBuild().
    */
-  public function providerTestBuild() {
+  public static function providerTestBuild() {
     $data = [];
     $data['array'] = [
       new ReturnPromise([['content' => ['#markup' => 'The field value']]]),
diff --git a/core/modules/layout_builder/tests/src/Kernel/LayoutBuilderEntityViewDisplayTest.php b/core/modules/layout_builder/tests/src/Kernel/LayoutBuilderEntityViewDisplayTest.php
index e0df4ad034bc..e18a30afbe49 100644
--- a/core/modules/layout_builder/tests/src/Kernel/LayoutBuilderEntityViewDisplayTest.php
+++ b/core/modules/layout_builder/tests/src/Kernel/LayoutBuilderEntityViewDisplayTest.php
@@ -64,7 +64,7 @@ class LayoutBuilderEntityViewDisplayTest extends SectionListTestBase {
   /**
    * Provides test data for ::testIsLayoutBuilderEnabled().
    */
-  public function providerTestIsLayoutBuilderEnabled() {
+  public static function providerTestIsLayoutBuilderEnabled() {
     $data = [];
     $data['default enabled'] = [TRUE, 'default', TRUE];
     $data['default disabled'] = [FALSE, 'default', FALSE];
diff --git a/core/modules/layout_builder/tests/src/Kernel/LayoutEntityHelperTraitTest.php b/core/modules/layout_builder/tests/src/Kernel/LayoutEntityHelperTraitTest.php
index 1b9c74e59f1d..62f77f78830f 100644
--- a/core/modules/layout_builder/tests/src/Kernel/LayoutEntityHelperTraitTest.php
+++ b/core/modules/layout_builder/tests/src/Kernel/LayoutEntityHelperTraitTest.php
@@ -49,7 +49,7 @@ class LayoutEntityHelperTraitTest extends KernelTestBase {
   /**
    * Data provider for testGetSectionStorageForEntity().
    */
-  public function providerTestGetSectionStorageForEntity() {
+  public static function providerTestGetSectionStorageForEntity() {
     $data = [];
     $data['entity_view_display'] = [
       'entity_view_display',
@@ -122,7 +122,7 @@ class LayoutEntityHelperTraitTest extends KernelTestBase {
   /**
    * Data provider for testOriginalEntityUsesDefaultStorage().
    */
-  public function providerTestOriginalEntityUsesDefaultStorage() {
+  public static function providerTestOriginalEntityUsesDefaultStorage() {
     return [
       'original uses default' => [
         [
diff --git a/core/modules/layout_builder/tests/src/Kernel/OverridesSectionStorageTest.php b/core/modules/layout_builder/tests/src/Kernel/OverridesSectionStorageTest.php
index b4dbf785e17d..ff4dcf7298cb 100644
--- a/core/modules/layout_builder/tests/src/Kernel/OverridesSectionStorageTest.php
+++ b/core/modules/layout_builder/tests/src/Kernel/OverridesSectionStorageTest.php
@@ -117,7 +117,7 @@ class OverridesSectionStorageTest extends KernelTestBase {
   /**
    * Provides test data for ::testAccess().
    */
-  public function providerTestAccess() {
+  public static function providerTestAccess() {
     $section_data = [
       new Section('layout_onecol', [], [
         '10000000-0000-1000-a000-000000000000' => new SectionComponent('10000000-0000-1000-a000-000000000000', 'content', ['id' => 'foo']),
diff --git a/core/modules/layout_builder/tests/src/Kernel/SectionListTestBase.php b/core/modules/layout_builder/tests/src/Kernel/SectionListTestBase.php
index 0a769bca3bae..2e3de8b4bccb 100644
--- a/core/modules/layout_builder/tests/src/Kernel/SectionListTestBase.php
+++ b/core/modules/layout_builder/tests/src/Kernel/SectionListTestBase.php
@@ -142,7 +142,7 @@ abstract class SectionListTestBase extends EntityKernelTestBase {
   /**
    * Provides test data for ::testRemoveAllSections().
    */
-  public function providerTestRemoveAllSections() {
+  public static function providerTestRemoveAllSections() {
     $data = [];
     $data[] = [NULL, []];
     $data[] = [FALSE, []];
diff --git a/core/modules/layout_builder/tests/src/Unit/BlockComponentRenderArrayTest.php b/core/modules/layout_builder/tests/src/Unit/BlockComponentRenderArrayTest.php
index 7ace912fc5b0..10787a76cb55 100644
--- a/core/modules/layout_builder/tests/src/Unit/BlockComponentRenderArrayTest.php
+++ b/core/modules/layout_builder/tests/src/Unit/BlockComponentRenderArrayTest.php
@@ -47,7 +47,7 @@ class BlockComponentRenderArrayTest extends UnitTestCase {
   /**
    * Data provider for test functions that should test block types.
    */
-  public function providerBlockTypes() {
+  public static function providerBlockTypes() {
     return [
       [TRUE],
       [FALSE],
diff --git a/core/modules/layout_builder/tests/src/Unit/DefaultsSectionStorageTest.php b/core/modules/layout_builder/tests/src/Unit/DefaultsSectionStorageTest.php
index a0abb96c7b58..190110cda711 100644
--- a/core/modules/layout_builder/tests/src/Unit/DefaultsSectionStorageTest.php
+++ b/core/modules/layout_builder/tests/src/Unit/DefaultsSectionStorageTest.php
@@ -148,7 +148,7 @@ class DefaultsSectionStorageTest extends UnitTestCase {
   /**
    * Provides data for ::testExtractEntityFromRoute().
    */
-  public function providerTestExtractEntityFromRoute() {
+  public static function providerTestExtractEntityFromRoute() {
     // Data provider values are:
     // - whether a successful result is expected
     // - the expected entity ID
diff --git a/core/modules/layout_builder/tests/src/Unit/LayoutBuilderIsActiveCacheContextTest.php b/core/modules/layout_builder/tests/src/Unit/LayoutBuilderIsActiveCacheContextTest.php
index 2b8cbd00f8b5..b81f9b2ff61a 100644
--- a/core/modules/layout_builder/tests/src/Unit/LayoutBuilderIsActiveCacheContextTest.php
+++ b/core/modules/layout_builder/tests/src/Unit/LayoutBuilderIsActiveCacheContextTest.php
@@ -96,7 +96,7 @@ class LayoutBuilderIsActiveCacheContextTest extends UnitTestCase {
   /**
    * Provides test data for ::testGetContext().
    */
-  public function providerTestGetContext() {
+  public static function providerTestGetContext() {
     $data = [];
     $data['overridden'] = [
       TRUE,
diff --git a/core/modules/layout_builder/tests/src/Unit/OverridesSectionStorageTest.php b/core/modules/layout_builder/tests/src/Unit/OverridesSectionStorageTest.php
index 6510e6289340..a9f8ba3b4c2a 100644
--- a/core/modules/layout_builder/tests/src/Unit/OverridesSectionStorageTest.php
+++ b/core/modules/layout_builder/tests/src/Unit/OverridesSectionStorageTest.php
@@ -120,7 +120,7 @@ class OverridesSectionStorageTest extends UnitTestCase {
   /**
    * Provides data for ::testExtractEntityFromRoute().
    */
-  public function providerTestExtractEntityFromRoute() {
+  public static function providerTestExtractEntityFromRoute() {
     // Data provider values are:
     // - whether a successful result is expected
     // - the expected entity ID
diff --git a/core/modules/layout_builder/tests/src/Unit/SectionStorageManagerTest.php b/core/modules/layout_builder/tests/src/Unit/SectionStorageManagerTest.php
index 64ffbf5abd38..0f3f8f0cc4ca 100644
--- a/core/modules/layout_builder/tests/src/Unit/SectionStorageManagerTest.php
+++ b/core/modules/layout_builder/tests/src/Unit/SectionStorageManagerTest.php
@@ -192,7 +192,7 @@ class SectionStorageManagerTest extends UnitTestCase {
   /**
    * Provides test data for ::testFindByContext().
    */
-  public function providerTestFindByContext() {
+  public static function providerTestFindByContext() {
     // Data provider values are:
     // - the result for the plugin's isApplicable() method to return.
     $data = [];
diff --git a/core/modules/layout_builder/tests/src/Unit/SectionTest.php b/core/modules/layout_builder/tests/src/Unit/SectionTest.php
index f911459daff0..6ffa19570bdb 100644
--- a/core/modules/layout_builder/tests/src/Unit/SectionTest.php
+++ b/core/modules/layout_builder/tests/src/Unit/SectionTest.php
@@ -210,7 +210,7 @@ class SectionTest extends UnitTestCase {
   /**
    * Provides test data for ::testGetThirdPartySettings().
    */
-  public function providerTestGetThirdPartySettings() {
+  public static function providerTestGetThirdPartySettings() {
     $data = [];
     $data[] = [
       'bad_judgement',
@@ -286,7 +286,7 @@ class SectionTest extends UnitTestCase {
   /**
    * Provides test data for ::testSetThirdPartySettings().
    */
-  public function providerTestSetThirdPartySetting() {
+  public static function providerTestSetThirdPartySetting() {
     $data = [];
     $data[] = [
       'bad_judgement',
@@ -330,7 +330,7 @@ class SectionTest extends UnitTestCase {
   /**
    * Provides test data for ::testUnsetThirdPartySetting().
    */
-  public function providerTestUnsetThirdPartySetting() {
+  public static function providerTestUnsetThirdPartySetting() {
     $data = [];
     $data['Key with values'] = [
       'bad_judgement',
@@ -399,7 +399,7 @@ class SectionTest extends UnitTestCase {
   /**
    * Provides test data for ::testGetLayout().
    */
-  public function providerTestGetLayout() {
+  public static function providerTestGetLayout() {
     $data = [];
     $data['contexts'] = [['foo' => 'bar'], TRUE];
     $data['no contexts'] = [[], FALSE];
diff --git a/core/modules/layout_discovery/tests/src/Kernel/LayoutTest.php b/core/modules/layout_discovery/tests/src/Kernel/LayoutTest.php
index 1e76337a638b..afc7835ae0eb 100644
--- a/core/modules/layout_discovery/tests/src/Kernel/LayoutTest.php
+++ b/core/modules/layout_discovery/tests/src/Kernel/LayoutTest.php
@@ -91,7 +91,7 @@ class LayoutTest extends KernelTestBase {
   /**
    * Data provider for testRenderLayout().
    */
-  public function renderLayoutData() {
+  public static function renderLayoutData() {
     $html = [];
     $html[] = '<div data-drupal-selector="edit-layout" class="layout layout--onecol">';
     $html[] = '<div data-drupal-selector="edit-content" class="layout__region layout__region--content">';
diff --git a/core/modules/link/tests/src/FunctionalJavascript/LinkFieldFormStatesTest.php b/core/modules/link/tests/src/FunctionalJavascript/LinkFieldFormStatesTest.php
index 2a6d9ca6b643..bc76b1e78a1f 100644
--- a/core/modules/link/tests/src/FunctionalJavascript/LinkFieldFormStatesTest.php
+++ b/core/modules/link/tests/src/FunctionalJavascript/LinkFieldFormStatesTest.php
@@ -64,7 +64,7 @@ class LinkFieldFormStatesTest extends WebDriverTestBase {
   /**
    * Provides data for ::testLinkFieldJSFormStates.
    */
-  public function linkFieldFormStatesData() {
+  public static function linkFieldFormStatesData() {
     return [
       'Fill uri, keep title empty' => [
         'https://example.com',
diff --git a/core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidatorTest.php b/core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidatorTest.php
index 1ed27c509762..e88b63296726 100644
--- a/core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidatorTest.php
+++ b/core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidatorTest.php
@@ -51,7 +51,7 @@ class LinkExternalProtocolsConstraintValidatorTest extends UnitTestCase {
   /**
    * Data provider for ::testValidate.
    */
-  public function providerValidate() {
+  public static function providerValidate() {
     $data = [];
 
     // Test allowed protocols.
diff --git a/core/modules/link/tests/src/Unit/Plugin/migrate/process/FieldLinkTest.php b/core/modules/link/tests/src/Unit/Plugin/migrate/process/FieldLinkTest.php
index 87c399172e9b..fb09c54c68e6 100644
--- a/core/modules/link/tests/src/Unit/Plugin/migrate/process/FieldLinkTest.php
+++ b/core/modules/link/tests/src/Unit/Plugin/migrate/process/FieldLinkTest.php
@@ -33,7 +33,7 @@ class FieldLinkTest extends UnitTestCase {
   /**
    * Data provider for testCanonicalizeUri.
    */
-  public function canonicalizeUriDataProvider() {
+  public static function canonicalizeUriDataProvider() {
     return [
       'Simple front-page' => [
         '<front>',
diff --git a/core/modules/locale/tests/src/Functional/LocaleLocaleLookupTest.php b/core/modules/locale/tests/src/Functional/LocaleLocaleLookupTest.php
index 7ea710286ee1..7df92f83b31a 100644
--- a/core/modules/locale/tests/src/Functional/LocaleLocaleLookupTest.php
+++ b/core/modules/locale/tests/src/Functional/LocaleLocaleLookupTest.php
@@ -104,7 +104,7 @@ class LocaleLocaleLookupTest extends BrowserTestBase {
    *     - translation value
    *     - expected result
    */
-  public function providerTestFixOldPluralStyle() {
+  public static function providerTestFixOldPluralStyle() {
     return [
       'non-plural translation' => ['@count[2] non-plural test', '@count[2] non-plural test'],
       'plural translation' => ['@count[2] plural test' . PoItem::DELIMITER, '@count plural test'],
diff --git a/core/modules/locale/tests/src/Unit/LocaleLookupTest.php b/core/modules/locale/tests/src/Unit/LocaleLookupTest.php
index d4de8d8106eb..1a01ed159818 100644
--- a/core/modules/locale/tests/src/Unit/LocaleLookupTest.php
+++ b/core/modules/locale/tests/src/Unit/LocaleLookupTest.php
@@ -195,7 +195,7 @@ class LocaleLookupTest extends UnitTestCase {
   /**
    * Provides test data for testResolveCacheMissWithFallback().
    */
-  public function resolveCacheMissWithFallbackProvider() {
+  public static function resolveCacheMissWithFallbackProvider() {
     // cSpell:disable
     return [
       ['cs', 'test', 'irrelevant', 'test v české'],
@@ -325,7 +325,7 @@ class LocaleLookupTest extends UnitTestCase {
   /**
    * Provides test data for testResolveCacheMissWithFallback().
    */
-  public function providerFixOldPluralTranslationProvider() {
+  public static function providerFixOldPluralTranslationProvider() {
     $translations = [
       'by' => [
         'word1' => '@count[2] word-by',
@@ -373,7 +373,7 @@ class LocaleLookupTest extends UnitTestCase {
   /**
    * Provides test data for testGetCid().
    */
-  public function getCidProvider() {
+  public static function getCidProvider() {
     return [
       [
         ['a'], 'locale:en:irrelevant:a',
diff --git a/core/modules/locale/tests/src/Unit/Menu/LocaleLocalTasksTest.php b/core/modules/locale/tests/src/Unit/Menu/LocaleLocalTasksTest.php
index 72ad654bad75..f56b021476bf 100644
--- a/core/modules/locale/tests/src/Unit/Menu/LocaleLocalTasksTest.php
+++ b/core/modules/locale/tests/src/Unit/Menu/LocaleLocalTasksTest.php
@@ -38,7 +38,7 @@ class LocaleLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getLocalePageRoutes() {
+  public static function getLocalePageRoutes() {
     return [
       ['locale.translate_page'],
       ['locale.translate_import'],
diff --git a/core/modules/media/tests/src/Functional/FieldFormatter/OEmbedFormatterTest.php b/core/modules/media/tests/src/Functional/FieldFormatter/OEmbedFormatterTest.php
index 269160976d8c..ee70fb8f5794 100644
--- a/core/modules/media/tests/src/Functional/FieldFormatter/OEmbedFormatterTest.php
+++ b/core/modules/media/tests/src/Functional/FieldFormatter/OEmbedFormatterTest.php
@@ -55,7 +55,7 @@ class OEmbedFormatterTest extends MediaFunctionalTestBase {
    *
    * @return array
    */
-  public function providerRender() {
+  public static function providerRender() {
     return [
       'Vimeo video' => [
         'https://vimeo.com/7073899',
diff --git a/core/modules/media/tests/src/Functional/MediaUiReferenceWidgetTest.php b/core/modules/media/tests/src/Functional/MediaUiReferenceWidgetTest.php
index 49489022eeae..4a4f395ff47f 100644
--- a/core/modules/media/tests/src/Functional/MediaUiReferenceWidgetTest.php
+++ b/core/modules/media/tests/src/Functional/MediaUiReferenceWidgetTest.php
@@ -50,7 +50,7 @@ class MediaUiReferenceWidgetTest extends MediaFunctionalTestBase {
    * @return array[]
    *   Test data. See testMediaReferenceWidget() for the child array structure.
    */
-  public function providerTestMediaReferenceWidget() {
+  public static function providerTestMediaReferenceWidget() {
     return [
       // Single-value fields with a single media type and the default widget:
       // - The user can create and list the media.
diff --git a/core/modules/media/tests/src/Functional/ProviderRepositoryTest.php b/core/modules/media/tests/src/Functional/ProviderRepositoryTest.php
index d791a2f90ea7..6c812dae765d 100644
--- a/core/modules/media/tests/src/Functional/ProviderRepositoryTest.php
+++ b/core/modules/media/tests/src/Functional/ProviderRepositoryTest.php
@@ -50,7 +50,7 @@ class ProviderRepositoryTest extends MediaFunctionalTestBase {
    *
    * @return array
    */
-  public function providerEmptyProviderList() {
+  public static function providerEmptyProviderList() {
     return [
       'empty array' => ['[]'],
       'empty string' => [''],
@@ -84,7 +84,7 @@ class ProviderRepositoryTest extends MediaFunctionalTestBase {
    *
    * @return array
    */
-  public function providerNonExistingProviderDatabase() {
+  public static function providerNonExistingProviderDatabase() {
     return [
       [
         'http://oembed1.com/providers.json',
diff --git a/core/modules/media/tests/src/Functional/ResourceFetcherTest.php b/core/modules/media/tests/src/Functional/ResourceFetcherTest.php
index b83f7b9fa885..699e07ad19b8 100644
--- a/core/modules/media/tests/src/Functional/ResourceFetcherTest.php
+++ b/core/modules/media/tests/src/Functional/ResourceFetcherTest.php
@@ -35,7 +35,7 @@ class ResourceFetcherTest extends MediaFunctionalTestBase {
    *
    * @return array
    */
-  public function providerFetchResource() {
+  public static function providerFetchResource() {
     return [
       'JSON resource' => [
         'video_vimeo.json',
diff --git a/core/modules/media/tests/src/Functional/UrlResolverTest.php b/core/modules/media/tests/src/Functional/UrlResolverTest.php
index beb88d0de879..2af6722a8630 100644
--- a/core/modules/media/tests/src/Functional/UrlResolverTest.php
+++ b/core/modules/media/tests/src/Functional/UrlResolverTest.php
@@ -37,7 +37,7 @@ class UrlResolverTest extends MediaFunctionalTestBase {
    *
    * @return array
    */
-  public function providerEndpointMatching() {
+  public static function providerEndpointMatching() {
     return [
       'match by endpoint: Twitter' => [
         'https://twitter.com/Dries/status/999985431595880448',
@@ -99,7 +99,7 @@ class UrlResolverTest extends MediaFunctionalTestBase {
    *
    * @return array
    */
-  public function providerUrlDiscovery() {
+  public static function providerUrlDiscovery() {
     return [
       'JSON resource' => [
         'video_vimeo.html',
diff --git a/core/modules/media/tests/src/Kernel/MediaAccessControlHandlerTest.php b/core/modules/media/tests/src/Kernel/MediaAccessControlHandlerTest.php
index 9853060416ce..af64534a6493 100644
--- a/core/modules/media/tests/src/Kernel/MediaAccessControlHandlerTest.php
+++ b/core/modules/media/tests/src/Kernel/MediaAccessControlHandlerTest.php
@@ -132,7 +132,7 @@ class MediaAccessControlHandlerTest extends MediaKernelTestBase {
    * @return array
    *   The data sets to test.
    */
-  public function providerAccess() {
+  public static function providerAccess() {
     $test_data = [];
 
     // Check published / unpublished media access for a user owning the media
@@ -624,7 +624,7 @@ class MediaAccessControlHandlerTest extends MediaKernelTestBase {
    * @return array
    *   The data sets to test.
    */
-  public function providerCreateAccess() {
+  public static function providerCreateAccess() {
     $test_data = [];
 
     // Check create access for a user without permissions.
diff --git a/core/modules/media/tests/src/Kernel/MediaEmbedFilterTest.php b/core/modules/media/tests/src/Kernel/MediaEmbedFilterTest.php
index 6a9e6717ac0b..0b20c3f8f8dc 100644
--- a/core/modules/media/tests/src/Kernel/MediaEmbedFilterTest.php
+++ b/core/modules/media/tests/src/Kernel/MediaEmbedFilterTest.php
@@ -44,7 +44,7 @@ class MediaEmbedFilterTest extends MediaEmbedFilterTestBase {
   /**
    * Data provider for testBasics().
    */
-  public function providerTestBasics() {
+  public static function providerTestBasics() {
     $default_cacheability = (new CacheableMetadata())
       ->setCacheTags([
         '_media_test_embed_filter_access:media:1',
@@ -162,7 +162,7 @@ class MediaEmbedFilterTest extends MediaEmbedFilterTestBase {
   /**
    * Data provider for testAccessUnpublished().
    */
-  public function providerAccessUnpublished() {
+  public static function providerAccessUnpublished() {
     return [
       'user cannot access embedded media' => [
         FALSE,
@@ -260,7 +260,7 @@ class MediaEmbedFilterTest extends MediaEmbedFilterTestBase {
   /**
    * Data provider for testOverridesAltAndTitle().
    */
-  public function providerOverridesAltAndTitle() {
+  public static function providerOverridesAltAndTitle() {
     return [
       '`title` field property disabled ⇒ `title` is not overridable' => [
         FALSE,
@@ -306,7 +306,7 @@ class MediaEmbedFilterTest extends MediaEmbedFilterTestBase {
   /**
    * Data provider for testMissingEntityIndicator().
    */
-  public function providerMissingEntityIndicator() {
+  public static function providerMissingEntityIndicator() {
     return [
       'invalid UUID' => [
         'uuid' => 'invalidUUID',
@@ -425,7 +425,7 @@ class MediaEmbedFilterTest extends MediaEmbedFilterTestBase {
   /**
    * Data provider for testFilterIntegration().
    */
-  public function providerFilterIntegration() {
+  public static function providerFilterIntegration() {
     $default_asset_libraries = ['media/filter.caption'];
 
     $caption_additional_attributes = ['data-caption' => 'Yo.'];
diff --git a/core/modules/media/tests/src/Kernel/MediaEmbedFilterTranslationTest.php b/core/modules/media/tests/src/Kernel/MediaEmbedFilterTranslationTest.php
index ead63b80b8c4..da9335a6b5e7 100644
--- a/core/modules/media/tests/src/Kernel/MediaEmbedFilterTranslationTest.php
+++ b/core/modules/media/tests/src/Kernel/MediaEmbedFilterTranslationTest.php
@@ -68,7 +68,7 @@ class MediaEmbedFilterTranslationTest extends MediaEmbedFilterTestBase {
   /**
    * Data provider for testTranslationSelection().
    */
-  public function providerTranslationSituations() {
+  public static function providerTranslationSituations() {
     $embedded_entity_translation_languages = ['en', 'pt-br'];
 
     foreach (['en', 'pt-br', 'nl'] as $text_langcode) {
diff --git a/core/modules/media/tests/src/Kernel/MediaThumbnailFormatterTest.php b/core/modules/media/tests/src/Kernel/MediaThumbnailFormatterTest.php
index f02290e7f5c4..4671e43fb995 100644
--- a/core/modules/media/tests/src/Kernel/MediaThumbnailFormatterTest.php
+++ b/core/modules/media/tests/src/Kernel/MediaThumbnailFormatterTest.php
@@ -91,7 +91,7 @@ class MediaThumbnailFormatterTest extends MediaKernelTestBase {
    *
    * @return array[]
    */
-  public function providerTestSettingsSummary(): array {
+  public static function providerTestSettingsSummary(): array {
     return [
       'link to content' => [
         [
diff --git a/core/modules/media/tests/src/Kernel/OEmbedSourceTest.php b/core/modules/media/tests/src/Kernel/OEmbedSourceTest.php
index be3b092508f2..67b465c450f8 100644
--- a/core/modules/media/tests/src/Kernel/OEmbedSourceTest.php
+++ b/core/modules/media/tests/src/Kernel/OEmbedSourceTest.php
@@ -50,7 +50,7 @@ class OEmbedSourceTest extends MediaKernelTestBase {
    * @return array
    *   Sets of arguments to pass to the test method.
    */
-  public function providerThumbnailUri(): array {
+  public static function providerThumbnailUri(): array {
     return [
       'no query string, extension in URL' => [
         'internal:/core/misc/druplicon.png',
diff --git a/core/modules/media/tests/src/Unit/IFrameUrlHelperTest.php b/core/modules/media/tests/src/Unit/IFrameUrlHelperTest.php
index 8bcf151c7f8b..c4eb068ffcc4 100644
--- a/core/modules/media/tests/src/Unit/IFrameUrlHelperTest.php
+++ b/core/modules/media/tests/src/Unit/IFrameUrlHelperTest.php
@@ -23,7 +23,7 @@ class IFrameUrlHelperTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerIsSecure() {
+  public static function providerIsSecure() {
     return [
       'no domain' => [
         '/path/to/media.php',
diff --git a/core/modules/media/tests/src/Unit/ProviderRepositoryTest.php b/core/modules/media/tests/src/Unit/ProviderRepositoryTest.php
index ec353f195435..c45b1e4d609a 100644
--- a/core/modules/media/tests/src/Unit/ProviderRepositoryTest.php
+++ b/core/modules/media/tests/src/Unit/ProviderRepositoryTest.php
@@ -166,7 +166,7 @@ END;
    * @return array[]
    *   Sets of arguments to pass to the test method.
    */
-  public function providerInvalidResponse(): array {
+  public static function providerInvalidResponse(): array {
     return [
       'expired' => [
         -86400,
diff --git a/core/modules/media/tests/src/Unit/ResourceTest.php b/core/modules/media/tests/src/Unit/ResourceTest.php
index b47099e212f8..cff1d3ab5bbd 100644
--- a/core/modules/media/tests/src/Unit/ResourceTest.php
+++ b/core/modules/media/tests/src/Unit/ResourceTest.php
@@ -16,7 +16,7 @@ class ResourceTest extends UnitTestCase {
   /**
    * Test cases for ::testSetDimensions.
    */
-  public function setDimensionsTestCases() {
+  public static function setDimensionsTestCases() {
     return [
       'Standard rich dimensions' => [
         'rich',
diff --git a/core/modules/media_library/tests/src/FunctionalJavascript/EmbeddedFormWidgetTest.php b/core/modules/media_library/tests/src/FunctionalJavascript/EmbeddedFormWidgetTest.php
index 75378f053673..36e294abb77a 100644
--- a/core/modules/media_library/tests/src/FunctionalJavascript/EmbeddedFormWidgetTest.php
+++ b/core/modules/media_library/tests/src/FunctionalJavascript/EmbeddedFormWidgetTest.php
@@ -150,7 +150,7 @@ class EmbeddedFormWidgetTest extends WebDriverTestBase {
    * @return array
    *   Test data.
    */
-  public function insertionReselectionProvider() {
+  public static function insertionReselectionProvider() {
     return [
       'using media_library_widget' => [
         'widget' => 'media_library_widget',
diff --git a/core/modules/media_library/tests/src/FunctionalJavascript/WidgetOverflowTest.php b/core/modules/media_library/tests/src/FunctionalJavascript/WidgetOverflowTest.php
index a9139748901d..36692a563c9b 100644
--- a/core/modules/media_library/tests/src/FunctionalJavascript/WidgetOverflowTest.php
+++ b/core/modules/media_library/tests/src/FunctionalJavascript/WidgetOverflowTest.php
@@ -174,7 +174,7 @@ class WidgetOverflowTest extends MediaLibraryTestBase {
    * @return array[]
    *   Sets of arguments to pass to the test method.
    */
-  public function providerWidgetOverflow(): array {
+  public static function providerWidgetOverflow(): array {
     return [
       'Save' => [NULL],
       'Save and insert' => ['insert'],
diff --git a/core/modules/media_library/tests/src/Kernel/MediaLibraryAccessTest.php b/core/modules/media_library/tests/src/Kernel/MediaLibraryAccessTest.php
index 207b1f324179..0df7497470df 100644
--- a/core/modules/media_library/tests/src/Kernel/MediaLibraryAccessTest.php
+++ b/core/modules/media_library/tests/src/Kernel/MediaLibraryAccessTest.php
@@ -163,7 +163,7 @@ class MediaLibraryAccessTest extends KernelTestBase {
   /**
    * Data provider for ::testEditorOpenerAccess.
    */
-  public function editorOpenerAccessProvider() {
+  public static function editorOpenerAccessProvider() {
     return [
       'media_embed filter enabled' => [
         TRUE,
@@ -244,7 +244,7 @@ class MediaLibraryAccessTest extends KernelTestBase {
    * @return array[]
    *   Sets of arguments to pass to the test method.
    */
-  public function providerFieldWidgetEntityFieldAccess(): array {
+  public static function providerFieldWidgetEntityFieldAccess(): array {
     return [
       ['entity_reference'],
       ['entity_reference_subclass'],
diff --git a/core/modules/media_library/tests/src/Kernel/MediaLibraryStateTest.php b/core/modules/media_library/tests/src/Kernel/MediaLibraryStateTest.php
index f174f0141314..57a6b75f97c9 100644
--- a/core/modules/media_library/tests/src/Kernel/MediaLibraryStateTest.php
+++ b/core/modules/media_library/tests/src/Kernel/MediaLibraryStateTest.php
@@ -118,7 +118,7 @@ class MediaLibraryStateTest extends KernelTestBase {
    * @return array
    *   The data sets to test.
    */
-  public function providerCreate() {
+  public static function providerCreate() {
     $test_data = [];
 
     // Assert no exception is thrown when we add the parameters as expected.
@@ -306,7 +306,7 @@ class MediaLibraryStateTest extends KernelTestBase {
    * @return array
    *   The data sets to test.
    */
-  public function providerFromRequest() {
+  public static function providerFromRequest() {
     $test_data = [];
 
     // Assert no exception is thrown when we use valid state parameters.
diff --git a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/process/LinkUriTest.php b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/process/LinkUriTest.php
index 01ac9ffd8490..d9aa5b0708ad 100644
--- a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/process/LinkUriTest.php
+++ b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/process/LinkUriTest.php
@@ -62,7 +62,7 @@ class LinkUriTest extends KernelTestBase {
    *   - The value array to pass to LinkUri::transform().
    *   - The expected path returned by LinkUri::transform().
    */
-  public function providerTestRouted() {
+  public static function providerTestRouted() {
     $tests = [];
 
     $value = 'http://example.com';
@@ -105,7 +105,7 @@ class LinkUriTest extends KernelTestBase {
    *   - The expected path returned by LinkUri::transform().
    *   - (optional) A URL object that the path validator prophecy will return.
    */
-  public function providerTestNotRouted() {
+  public static function providerTestNotRouted() {
     $tests = [];
 
     $message = 'The path "%s" failed validation.';
@@ -155,7 +155,7 @@ class LinkUriTest extends KernelTestBase {
    *   - The value array to pass to LinkUri::transform().
    *   - The expected path returned by LinkUri::transform().
    */
-  public function providerTestDisablingRouteValidation() {
+  public static function providerTestDisablingRouteValidation() {
     $tests = [];
 
     $value = 'node/1';
diff --git a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/MenuLinkTest.php b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/MenuLinkTest.php
index 05e4d9fe38b2..84ba5f931672 100644
--- a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/MenuLinkTest.php
+++ b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/MenuLinkTest.php
@@ -25,7 +25,7 @@ class MenuLinkTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d6/MenuLinkTranslationTest.php b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d6/MenuLinkTranslationTest.php
index a61096eadfbf..52614e052186 100644
--- a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d6/MenuLinkTranslationTest.php
+++ b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d6/MenuLinkTranslationTest.php
@@ -22,7 +22,7 @@ class MenuLinkTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $test = [];
     $test[0]['source_data']['menu_links'] = [
       [
diff --git a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d7/MenuLinkLocalizedTest.php b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d7/MenuLinkLocalizedTest.php
index d6cb4112e0e7..37ef4fce9a4f 100644
--- a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d7/MenuLinkLocalizedTest.php
+++ b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d7/MenuLinkLocalizedTest.php
@@ -22,7 +22,7 @@ class MenuLinkLocalizedTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
     $tests[0]['source_data']['menu_links'] = [
       [
diff --git a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d7/MenuLinkTranslationTest.php b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d7/MenuLinkTranslationTest.php
index 35876e6bbe50..9f8b3adf93db 100644
--- a/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d7/MenuLinkTranslationTest.php
+++ b/core/modules/menu_link_content/tests/src/Kernel/Plugin/migrate/source/d7/MenuLinkTranslationTest.php
@@ -22,7 +22,7 @@ class MenuLinkTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $test = [];
     $test[0]['source_data']['menu_links'] = [
       [
diff --git a/core/modules/menu_ui/tests/src/Functional/MenuUiContentTranslationTest.php b/core/modules/menu_ui/tests/src/Functional/MenuUiContentTranslationTest.php
index 2fe723911c89..4aa35b2d2de7 100644
--- a/core/modules/menu_ui/tests/src/Functional/MenuUiContentTranslationTest.php
+++ b/core/modules/menu_ui/tests/src/Functional/MenuUiContentTranslationTest.php
@@ -101,7 +101,7 @@ class MenuUiContentTranslationTest extends BrowserTestBase {
    * @return array
    *   Data sets to test keyed by data set label.
    */
-  public function provideChangeContentToPseudoLanguageData() {
+  public static function provideChangeContentToPseudoLanguageData() {
     return [
       'und' => ['langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED],
       'zxx' => ['langcode' => LanguageInterface::LANGCODE_NOT_APPLICABLE],
diff --git a/core/modules/migrate/tests/src/Kernel/HighWaterNotJoinableTest.php b/core/modules/migrate/tests/src/Kernel/HighWaterNotJoinableTest.php
index a2eaa6e44629..50d5793ce0f7 100644
--- a/core/modules/migrate/tests/src/Kernel/HighWaterNotJoinableTest.php
+++ b/core/modules/migrate/tests/src/Kernel/HighWaterNotJoinableTest.php
@@ -22,7 +22,7 @@ class HighWaterNotJoinableTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // Test high water when the map is not joinable.
diff --git a/core/modules/migrate/tests/src/Kernel/MigrateSourceTestBase.php b/core/modules/migrate/tests/src/Kernel/MigrateSourceTestBase.php
index 56f6db4bdf05..6cc02b6f81a0 100644
--- a/core/modules/migrate/tests/src/Kernel/MigrateSourceTestBase.php
+++ b/core/modules/migrate/tests/src/Kernel/MigrateSourceTestBase.php
@@ -48,7 +48,7 @@ abstract class MigrateSourceTestBase extends KernelTestBase {
    *     counted.
    *   - (optional) Array of configuration options for the plugin under test.
    */
-  abstract public function providerSource();
+  abstract public static function providerSource();
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/migrate/tests/src/Kernel/MigrationPluginManagerTest.php b/core/modules/migrate/tests/src/Kernel/MigrationPluginManagerTest.php
index 44fe7878baba..11364ebdb3be 100644
--- a/core/modules/migrate/tests/src/Kernel/MigrationPluginManagerTest.php
+++ b/core/modules/migrate/tests/src/Kernel/MigrationPluginManagerTest.php
@@ -52,7 +52,7 @@ class MigrationPluginManagerTest extends MigrateTestBase {
   /**
    * Data provider for testCreateInstancesByTag.
    */
-  public function providerCreateInstanceByTag() {
+  public static function providerCreateInstanceByTag() {
     return [
       'get test' => [
         'test',
diff --git a/core/modules/migrate/tests/src/Kernel/Plugin/MigrationPluginConfigurationTest.php b/core/modules/migrate/tests/src/Kernel/Plugin/MigrationPluginConfigurationTest.php
index 618b548f10b7..0ba5fe499805 100644
--- a/core/modules/migrate/tests/src/Kernel/Plugin/MigrationPluginConfigurationTest.php
+++ b/core/modules/migrate/tests/src/Kernel/Plugin/MigrationPluginConfigurationTest.php
@@ -39,7 +39,7 @@ class MigrationPluginConfigurationTest extends KernelTestBase {
   /**
    * Provide configuration data for testing.
    */
-  public function mergeProvider() {
+  public static function mergeProvider() {
     return [
       // Tests adding new configuration to a migration.
       [
diff --git a/core/modules/migrate/tests/src/Kernel/Plugin/MigrationProvidersExistTest.php b/core/modules/migrate/tests/src/Kernel/Plugin/MigrationProvidersExistTest.php
index 2312e6f74d5a..2e53ebc263d8 100644
--- a/core/modules/migrate/tests/src/Kernel/Plugin/MigrationProvidersExistTest.php
+++ b/core/modules/migrate/tests/src/Kernel/Plugin/MigrationProvidersExistTest.php
@@ -200,7 +200,7 @@ class MigrationProvidersExistTest extends MigrateDrupalTestBase {
    * @return array
    *   Array of plugin definitions.
    */
-  public function fieldPluginDefinitionsProvider() {
+  public static function fieldPluginDefinitionsProvider() {
     return [
       'missing_core_scenario' => [
         'definitions' => [
diff --git a/core/modules/migrate/tests/src/Kernel/Plugin/MigrationTest.php b/core/modules/migrate/tests/src/Kernel/Plugin/MigrationTest.php
index 0211874690a2..9a7caf0dabf4 100644
--- a/core/modules/migrate/tests/src/Kernel/Plugin/MigrationTest.php
+++ b/core/modules/migrate/tests/src/Kernel/Plugin/MigrationTest.php
@@ -71,7 +71,7 @@ class MigrationTest extends KernelTestBase {
   /**
    * Provides data for testing invalid process pipeline.
    */
-  public function getProcessPluginsExceptionMessageProvider() {
+  public static function getProcessPluginsExceptionMessageProvider() {
     return [
       [
         'Null' =>
diff --git a/core/modules/migrate/tests/src/Kernel/Plugin/id_map/SqlTest.php b/core/modules/migrate/tests/src/Kernel/Plugin/id_map/SqlTest.php
index fbf5765851f3..6a93ad21c0dd 100644
--- a/core/modules/migrate/tests/src/Kernel/Plugin/id_map/SqlTest.php
+++ b/core/modules/migrate/tests/src/Kernel/Plugin/id_map/SqlTest.php
@@ -96,7 +96,7 @@ class SqlTest extends MigrateTestBase {
   /**
    * Provides data for testEnsureTables.
    */
-  public function providerTestEnsureTables() {
+  public static function providerTestEnsureTables() {
     return [
       'no ids' => [
         [],
@@ -156,7 +156,7 @@ class SqlTest extends MigrateTestBase {
   /**
    * Provides data for testFailEnsureTables.
    */
-  public function providerTestFailEnsureTables() {
+  public static function providerTestFailEnsureTables() {
     return [
       'one id' => [
         [
diff --git a/core/modules/migrate/tests/src/Kernel/Plugin/source/MigrateSqlSourceCountCacheTest.php b/core/modules/migrate/tests/src/Kernel/Plugin/source/MigrateSqlSourceCountCacheTest.php
index b5b4db34aa85..5914cbf6f98e 100644
--- a/core/modules/migrate/tests/src/Kernel/Plugin/source/MigrateSqlSourceCountCacheTest.php
+++ b/core/modules/migrate/tests/src/Kernel/Plugin/source/MigrateSqlSourceCountCacheTest.php
@@ -23,7 +23,7 @@ class MigrateSqlSourceCountCacheTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     // All tests use the same source_data, expected_data, expected_count, and
     // high_water. The high water is set later to maintain the order of the
     // parameters.
diff --git a/core/modules/migrate/tests/src/Kernel/SqlBaseTest.php b/core/modules/migrate/tests/src/Kernel/SqlBaseTest.php
index 87dd77ba918b..ad65962e06e0 100644
--- a/core/modules/migrate/tests/src/Kernel/SqlBaseTest.php
+++ b/core/modules/migrate/tests/src/Kernel/SqlBaseTest.php
@@ -189,7 +189,7 @@ class SqlBaseTest extends MigrateTestBase {
    * @return array
    *   The scenarios to test.
    */
-  public function highWaterDataProvider() {
+  public static function highWaterDataProvider() {
     return [
       'no high-water value set' => [],
       'high-water value set' => [33],
diff --git a/core/modules/migrate/tests/src/Kernel/process/ExtractTest.php b/core/modules/migrate/tests/src/Kernel/process/ExtractTest.php
index c85f8aab1a57..5537d99378c8 100644
--- a/core/modules/migrate/tests/src/Kernel/process/ExtractTest.php
+++ b/core/modules/migrate/tests/src/Kernel/process/ExtractTest.php
@@ -80,7 +80,7 @@ class ExtractTest extends KernelTestBase {
   /**
    * Provides multiple source data for "extract" process plugin test.
    */
-  public function multipleValueProviderSource() {
+  public static function multipleValueProviderSource() {
     $tests = [
       [
         'source_data' => [
diff --git a/core/modules/migrate/tests/src/Kernel/process/FileCopyTest.php b/core/modules/migrate/tests/src/Kernel/process/FileCopyTest.php
index ae52f6c6fe7a..3c5c5e1d0c49 100644
--- a/core/modules/migrate/tests/src/Kernel/process/FileCopyTest.php
+++ b/core/modules/migrate/tests/src/Kernel/process/FileCopyTest.php
@@ -109,7 +109,7 @@ class FileCopyTest extends FileTestBase {
   /**
    * Provides the source and destination path files.
    */
-  public function providerSuccessfulReuse() {
+  public static function providerSuccessfulReuse() {
     return [
       [
         'local_source_path' => static::getDrupalRoot() . '/core/tests/fixtures/files/image-test.jpg',
diff --git a/core/modules/migrate/tests/src/Kernel/process/HandleMultiplesTest.php b/core/modules/migrate/tests/src/Kernel/process/HandleMultiplesTest.php
index 548219feb155..29f4e6829430 100644
--- a/core/modules/migrate/tests/src/Kernel/process/HandleMultiplesTest.php
+++ b/core/modules/migrate/tests/src/Kernel/process/HandleMultiplesTest.php
@@ -136,7 +136,7 @@ class HandleMultiplesTest extends KernelTestBase {
    *
    * @return array
    */
-  public function scalarAndMultipleValuesProviderSource() {
+  public static function scalarAndMultipleValuesProviderSource() {
     return [
       [
         'source_data' => [
diff --git a/core/modules/migrate/tests/src/Kernel/process/RouteTest.php b/core/modules/migrate/tests/src/Kernel/process/RouteTest.php
index 850abf21ac85..53ebf0362551 100644
--- a/core/modules/migrate/tests/src/Kernel/process/RouteTest.php
+++ b/core/modules/migrate/tests/src/Kernel/process/RouteTest.php
@@ -49,7 +49,7 @@ class RouteTest extends KernelTestBase {
    *   An array of arrays, where the first element is the input to the Route
    *   process plugin, and the second is the expected results.
    */
-  public function providerTestRoute() {
+  public static function providerTestRoute() {
     // Internal link tests.
     // Valid link path and options.
     $values[0] = [
@@ -214,7 +214,7 @@ class RouteTest extends KernelTestBase {
    *   An array of arrays, where the first element is the input to the Route
    *   process plugin, and the second is the expected results.
    */
-  public function providerTestRouteWithParamQuery() {
+  public static function providerTestRouteWithParamQuery() {
     $values = [];
     $expected = [];
     // Valid link path with query options and parameters.
diff --git a/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php b/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php
index b984b7ae52ed..773919205fa1 100644
--- a/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php
@@ -510,7 +510,7 @@ class MigrateExecutableTest extends MigrateTestCase {
    * @return array
    *   The test cases.
    */
-  public function providerTestRollback() {
+  public static function providerTestRollback() {
     return [
       'Rollback delete' => [
         'ID map records' => [
diff --git a/core/modules/migrate/tests/src/Unit/MigrateLookupTest.php b/core/modules/migrate/tests/src/Unit/MigrateLookupTest.php
index 9805916fd54e..7aa4eeeca54e 100644
--- a/core/modules/migrate/tests/src/Unit/MigrateLookupTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrateLookupTest.php
@@ -66,7 +66,7 @@ class MigrateLookupTest extends MigrateTestCase {
   /**
    * Provides data for testExceptionOnMigrationNotFound.
    */
-  public function providerExceptionOnMigrationNotFound() {
+  public static function providerExceptionOnMigrationNotFound() {
     return [
       'string' => [
         'bad_plugin',
@@ -96,7 +96,7 @@ class MigrateLookupTest extends MigrateTestCase {
   /**
    * Provides data for testExceptionOnMultipleMigrationsNotFound.
    */
-  public function providerExceptionOnMultipleMigrationsNotFound() {
+  public static function providerExceptionOnMultipleMigrationsNotFound() {
     return [
       'array two items' => [
         ['foo', 'bar'],
diff --git a/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapTest.php b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapTest.php
index 0ba79e1aab5d..49070c2edba8 100644
--- a/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapTest.php
@@ -387,7 +387,7 @@ class MigrateSqlIdMapTest extends MigrateTestCase {
    * @return array
    *   An array of data values.
    */
-  public function lookupDestinationIdMappingDataProvider() {
+  public static function lookupDestinationIdMappingDataProvider() {
     return [
       [1, 1],
       [2, 2],
@@ -605,7 +605,7 @@ class MigrateSqlIdMapTest extends MigrateTestCase {
    * @return array
    *   An array of data values.
    */
-  public function lookupSourceIdMappingDataProvider() {
+  public static function lookupSourceIdMappingDataProvider() {
     return [
       [1, 1],
       [2, 2],
@@ -762,7 +762,7 @@ class MigrateSqlIdMapTest extends MigrateTestCase {
    * @return array
    *   An array of data values.
    */
-  public function updateCountDataProvider() {
+  public static function updateCountDataProvider() {
     return [
       [0],
       [1],
@@ -810,7 +810,7 @@ class MigrateSqlIdMapTest extends MigrateTestCase {
    * @return array
    *   An array of data values.
    */
-  public function errorCountDataProvider() {
+  public static function errorCountDataProvider() {
     return [
       [0],
       [1],
@@ -1096,7 +1096,7 @@ class MigrateSqlIdMapTest extends MigrateTestCase {
    * @return array
    *   An array of data values.
    */
-  public function getHighestIdDataProvider() {
+  public static function getHighestIdDataProvider() {
     return [
       'Destination ID type integer' => [
         'dest_ids' => [
@@ -1161,7 +1161,7 @@ class MigrateSqlIdMapTest extends MigrateTestCase {
    * @return array
    *   An array of data values.
    */
-  public function getHighestIdInvalidDataProvider() {
+  public static function getHighestIdInvalidDataProvider() {
     return [
       'Destination ID type string' => [
         'ids' => [
diff --git a/core/modules/migrate/tests/src/Unit/MigrationPluginManagerTest.php b/core/modules/migrate/tests/src/Unit/MigrationPluginManagerTest.php
index 223ade26c774..be4ae0ff6a69 100644
--- a/core/modules/migrate/tests/src/Unit/MigrationPluginManagerTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrationPluginManagerTest.php
@@ -90,7 +90,7 @@ class MigrationPluginManagerTest extends UnitTestCase {
   /**
    * Provide dependency data for testing.
    */
-  public function dependencyProvider() {
+  public static function dependencyProvider() {
     return [
       // Just one migration, with no dependencies.
       [
diff --git a/core/modules/migrate/tests/src/Unit/MigrationTest.php b/core/modules/migrate/tests/src/Unit/MigrationTest.php
index adc40320100d..bfd768b47534 100644
--- a/core/modules/migrate/tests/src/Unit/MigrationTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrationTest.php
@@ -212,7 +212,7 @@ class MigrationTest extends UnitTestCase {
   /**
    * Provides data for valid migration configuration test.
    */
-  public function getValidMigrationDependenciesProvider() {
+  public static function getValidMigrationDependenciesProvider() {
     return [
       [
         'source' => NULL,
@@ -240,7 +240,7 @@ class MigrationTest extends UnitTestCase {
   /**
    * Provides invalid migration dependencies.
    */
-  public function getInvalidMigrationDependenciesProvider() {
+  public static function getInvalidMigrationDependenciesProvider() {
     return [
       'invalid key' => [
         'dependencies' => ['bogus' => []],
diff --git a/core/modules/migrate/tests/src/Unit/RowTest.php b/core/modules/migrate/tests/src/Unit/RowTest.php
index fe89748acdb6..83b8d7689a79 100644
--- a/core/modules/migrate/tests/src/Unit/RowTest.php
+++ b/core/modules/migrate/tests/src/Unit/RowTest.php
@@ -333,7 +333,7 @@ class RowTest extends UnitTestCase {
    * @return array
    *   The keys and expected values.
    */
-  public function getDataProvider() {
+  public static function getDataProvider() {
     return [
       ['source_key_1', 'source_value_1'],
       ['source_key_2', 'source_value_2'],
@@ -377,7 +377,7 @@ class RowTest extends UnitTestCase {
    * @return array
    *   The keys and expected values.
    */
-  public function getMultipleDataProvider() {
+  public static function getMultipleDataProvider() {
     return [
       'Single Key' => [
         'keys' => ['source_key_1'],
diff --git a/core/modules/migrate/tests/src/Unit/SqlBaseTest.php b/core/modules/migrate/tests/src/Unit/SqlBaseTest.php
index 0f62b7f34f7a..064e64343da8 100644
--- a/core/modules/migrate/tests/src/Unit/SqlBaseTest.php
+++ b/core/modules/migrate/tests/src/Unit/SqlBaseTest.php
@@ -85,7 +85,7 @@ class SqlBaseTest extends UnitTestCase {
    * @return array
    *   An array of data per test run.
    */
-  public function sqlBaseTestProvider() {
+  public static function sqlBaseTestProvider() {
     return [
       // Source ids are empty so mapJoinable() is false.
       [
diff --git a/core/modules/migrate/tests/src/Unit/process/CallbackTest.php b/core/modules/migrate/tests/src/Unit/process/CallbackTest.php
index 5170c85959b2..485c4eb669bb 100644
--- a/core/modules/migrate/tests/src/Unit/process/CallbackTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/CallbackTest.php
@@ -29,7 +29,7 @@ class CallbackTest extends MigrateProcessTestCase {
   /**
    * Data provider for ::testCallback().
    */
-  public function providerCallback() {
+  public static function providerCallback() {
     return [
       'function' => ['strtolower'],
       'class method' => [[self::class, 'strtolower']],
@@ -51,7 +51,7 @@ class CallbackTest extends MigrateProcessTestCase {
   /**
    * Data provider for ::testCallbackArray().
    */
-  public function providerCallbackArray() {
+  public static function providerCallbackArray() {
     return [
       'date format' => [
         'date',
@@ -100,7 +100,7 @@ class CallbackTest extends MigrateProcessTestCase {
   /**
    * Data provider for ::testCallbackExceptions().
    */
-  public function providerCallbackExceptions() {
+  public static function providerCallbackExceptions() {
     return [
       'not set' => [
         'message' => 'The "callable" must be set.',
diff --git a/core/modules/migrate/tests/src/Unit/process/DefaultValueTest.php b/core/modules/migrate/tests/src/Unit/process/DefaultValueTest.php
index 3eed164eda74..d2872b7877b6 100644
--- a/core/modules/migrate/tests/src/Unit/process/DefaultValueTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/DefaultValueTest.php
@@ -32,7 +32,7 @@ class DefaultValueTest extends MigrateProcessTestCase {
    *
    * @return array
    */
-  public function defaultValueDataProvider() {
+  public static function defaultValueDataProvider() {
     return [
       'strict_true_value_populated_array' => [
         'configuration' => [
diff --git a/core/modules/migrate/tests/src/Unit/process/ExplodeTest.php b/core/modules/migrate/tests/src/Unit/process/ExplodeTest.php
index 4eede4309f5d..0a7904735076 100644
--- a/core/modules/migrate/tests/src/Unit/process/ExplodeTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/ExplodeTest.php
@@ -78,7 +78,7 @@ class ExplodeTest extends MigrateProcessTestCase {
   /**
    * Data provider for ::testExplodeWithNonStrictAndEmptySource().
    */
-  public function providerExplodeWithNonStrictAndEmptySource() {
+  public static function providerExplodeWithNonStrictAndEmptySource() {
     return [
       'normal_string' => ['a|b|c', ['a', 'b', 'c']],
       'integer_cast_to_string' => [123, ['123']],
diff --git a/core/modules/migrate/tests/src/Unit/process/ExtractTest.php b/core/modules/migrate/tests/src/Unit/process/ExtractTest.php
index d83ed31866ab..4c44f848c64b 100644
--- a/core/modules/migrate/tests/src/Unit/process/ExtractTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/ExtractTest.php
@@ -84,7 +84,7 @@ class ExtractTest extends MigrateProcessTestCase {
   /**
    * Data provider for testExtractDefault.
    */
-  public function providerExtractDefault() {
+  public static function providerExtractDefault() {
     return [
       [
         ['foo' => 'bar'],
@@ -140,7 +140,7 @@ class ExtractTest extends MigrateProcessTestCase {
   /**
    * Provides data for the testExtractInvalid.
    */
-  public function providerTestExtractInvalid() {
+  public static function providerTestExtractInvalid() {
     $xml_str = <<<XML
     <xml version='1.0'?>
       <authors>
diff --git a/core/modules/migrate/tests/src/Unit/process/FileCopyTest.php b/core/modules/migrate/tests/src/Unit/process/FileCopyTest.php
index 62e3752247c3..eeb315b2dbd9 100644
--- a/core/modules/migrate/tests/src/Unit/process/FileCopyTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/FileCopyTest.php
@@ -35,7 +35,7 @@ class FileCopyTest extends MigrateProcessTestCase {
   /**
    * Data provider for testFileProcessBaseConstructor.
    */
-  public function providerFileProcessBaseConstructor() {
+  public static function providerFileProcessBaseConstructor() {
     return [
       [['file_exists' => 'replace'], FileSystemInterface::EXISTS_REPLACE],
       [['file_exists' => 'rename'], FileSystemInterface::EXISTS_RENAME],
diff --git a/core/modules/migrate/tests/src/Unit/process/FlattenTest.php b/core/modules/migrate/tests/src/Unit/process/FlattenTest.php
index ff7072682050..571b568d61b2 100644
--- a/core/modules/migrate/tests/src/Unit/process/FlattenTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/FlattenTest.php
@@ -35,7 +35,7 @@ class FlattenTest extends MigrateProcessTestCase {
   /**
    * Provides data for the testFlatten.
    */
-  public function providerTestFlatten() {
+  public static function providerTestFlatten() {
     $object = (object) [
       'a' => 'test',
       'b' => '1.2',
@@ -68,7 +68,7 @@ class FlattenTest extends MigrateProcessTestCase {
   /**
    * Provides data for the testFlattenInvalid.
    */
-  public function providerTestFlattenInvalid() {
+  public static function providerTestFlattenInvalid() {
     $xml_str = <<<XML
 <xml version='1.0'?>
 <authors>
diff --git a/core/modules/migrate/tests/src/Unit/process/FormatDateTest.php b/core/modules/migrate/tests/src/Unit/process/FormatDateTest.php
index 7d2c1313ed80..67c917ce9432 100644
--- a/core/modules/migrate/tests/src/Unit/process/FormatDateTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/FormatDateTest.php
@@ -103,7 +103,7 @@ class FormatDateTest extends MigrateProcessTestCase {
    * @return array
    *   Array of date formats and actual/expected values.
    */
-  public function datesDataProvider() {
+  public static function datesDataProvider() {
     return [
       'datetime_date' => [
         'configuration' => [
diff --git a/core/modules/migrate/tests/src/Unit/process/GetTest.php b/core/modules/migrate/tests/src/Unit/process/GetTest.php
index 20e7d1e9752b..a1e4b9769476 100644
--- a/core/modules/migrate/tests/src/Unit/process/GetTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/GetTest.php
@@ -97,7 +97,7 @@ class GetTest extends MigrateProcessTestCase {
    *
    * @return array
    */
-  public function integerValuesDataProvider() {
+  public static function integerValuesDataProvider() {
     return [
       [
         'source' => [0 => 0, 1 => 'test'],
diff --git a/core/modules/migrate/tests/src/Unit/process/LogTest.php b/core/modules/migrate/tests/src/Unit/process/LogTest.php
index 13244ad1d31a..fa3abf6b3eb0 100644
--- a/core/modules/migrate/tests/src/Unit/process/LogTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/LogTest.php
@@ -37,7 +37,7 @@ class LogTest extends MigrateProcessTestCase {
    * @return string[][]
    *   An array of test data arrays.
    */
-  public function providerTestLog() {
+  public static function providerTestLog() {
     $object = (object) [
       'a' => 'test',
       'b' => 'test2',
diff --git a/core/modules/migrate/tests/src/Unit/process/MachineNameTest.php b/core/modules/migrate/tests/src/Unit/process/MachineNameTest.php
index eae1f1647ec5..7a0f45f90dbf 100644
--- a/core/modules/migrate/tests/src/Unit/process/MachineNameTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/MachineNameTest.php
@@ -70,7 +70,7 @@ class MachineNameTest extends MigrateProcessTestCase {
    * @return array
    *   An array of test cases.
    */
-  public function providerTestMachineNames(): array {
+  public static function providerTestMachineNames(): array {
     return [
       // Tests the following transformations:
       // - non-alphanumeric character (including spaces) -> underscore,
diff --git a/core/modules/migrate/tests/src/Unit/process/MakeUniqueEntityFieldTest.php b/core/modules/migrate/tests/src/Unit/process/MakeUniqueEntityFieldTest.php
index 175b9f3efa01..c73abd63812b 100644
--- a/core/modules/migrate/tests/src/Unit/process/MakeUniqueEntityFieldTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/MakeUniqueEntityFieldTest.php
@@ -118,7 +118,7 @@ class MakeUniqueEntityFieldTest extends MigrateProcessTestCase {
   /**
    * Data provider for testMakeUniqueEntityField().
    */
-  public function providerTestMakeUniqueEntityField() {
+  public static function providerTestMakeUniqueEntityField() {
     return [
       // Tests no duplication.
       [0],
diff --git a/core/modules/migrate/tests/src/Unit/process/MenuLinkParentTest.php b/core/modules/migrate/tests/src/Unit/process/MenuLinkParentTest.php
index 885aaba15bf4..f18ec2de7523 100644
--- a/core/modules/migrate/tests/src/Unit/process/MenuLinkParentTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/MenuLinkParentTest.php
@@ -101,7 +101,7 @@ class MenuLinkParentTest extends MigrateProcessTestCase {
   /**
    * Provides data for testTransformException().
    */
-  public function providerTransformException() {
+  public static function providerTransformException() {
     // The parent ID does not for the following tests.
     return [
       'parent link external and could not be loaded' => [
@@ -159,7 +159,7 @@ class MenuLinkParentTest extends MigrateProcessTestCase {
   /**
    * Provides data for testMenuLinkParent().
    */
-  public function providerMenuLinkParent() {
+  public static function providerMenuLinkParent() {
     return [
       'menu link is route item' => [
         'source_value' => [0, NULL, NULL],
diff --git a/core/modules/migrate/tests/src/Unit/process/MigrationLookupTest.php b/core/modules/migrate/tests/src/Unit/process/MigrationLookupTest.php
index 3d2558bd9165..5699e30723d6 100644
--- a/core/modules/migrate/tests/src/Unit/process/MigrationLookupTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/MigrationLookupTest.php
@@ -100,7 +100,7 @@ class MigrationLookupTest extends MigrationLookupTestCase {
    * @return array
    *   Empty values.
    */
-  public function skipInvalidDataProvider() {
+  public static function skipInvalidDataProvider() {
     return [
       'Empty String' => [''],
       'Boolean False' => [FALSE],
@@ -144,7 +144,7 @@ class MigrationLookupTest extends MigrationLookupTestCase {
    * @return array
    *   Empty values.
    */
-  public function noSkipValidDataProvider() {
+  public static function noSkipValidDataProvider() {
     return [
       'Integer Zero' => [0],
       'String Zero' => ['0'],
@@ -186,7 +186,7 @@ class MigrationLookupTest extends MigrationLookupTestCase {
    * @return array
    *   The data.
    */
-  public function successfulLookupDataProvider() {
+  public static function successfulLookupDataProvider() {
     return [
       // Test data for scalar to scalar.
       [
diff --git a/core/modules/migrate/tests/src/Unit/process/NullCoalesceTest.php b/core/modules/migrate/tests/src/Unit/process/NullCoalesceTest.php
index d822e142a1bb..765f19f7e425 100644
--- a/core/modules/migrate/tests/src/Unit/process/NullCoalesceTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/NullCoalesceTest.php
@@ -49,7 +49,7 @@ class NullCoalesceTest extends MigrateProcessTestCase {
   /**
    * Provides Data for ::testTransform.
    */
-  public function transformDataProvider() {
+  public static function transformDataProvider() {
     return [
       'all null' => [
         'source' => [NULL, NULL, NULL],
@@ -103,7 +103,7 @@ class NullCoalesceTest extends MigrateProcessTestCase {
   /**
    * Provides Data for ::testTransformWithDefault.
    */
-  public function transformWithDefaultProvider() {
+  public static function transformWithDefaultProvider() {
     return [
       'default not used' => [
         'source' => [NULL, NULL, 'Test', 'Test 2'],
diff --git a/core/modules/migrate/tests/src/Unit/process/SubProcessTest.php b/core/modules/migrate/tests/src/Unit/process/SubProcessTest.php
index 1adbeda5ca97..64df3ddab3ce 100644
--- a/core/modules/migrate/tests/src/Unit/process/SubProcessTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/SubProcessTest.php
@@ -86,7 +86,7 @@ class SubProcessTest extends MigrateProcessTestCase {
   /**
    * Data provider for testSubProcess().
    */
-  public function providerTestSubProcess() {
+  public static function providerTestSubProcess() {
     return [
       'no source context' => [
         'process configuration' => [
@@ -173,7 +173,7 @@ class SubProcessTest extends MigrateProcessTestCase {
   /**
    * Data provider for testNotFoundSubProcess().
    */
-  public function providerTestNotFoundSubProcess() {
+  public static function providerTestNotFoundSubProcess() {
     return [
       'no key' => [
         'process configuration' => [
@@ -210,7 +210,7 @@ class SubProcessTest extends MigrateProcessTestCase {
   /**
    * Data provider for testSourceNotArray().
    */
-  public function providerTestSourceNotArray() {
+  public static function providerTestSourceNotArray() {
     return [
       'strings cannot be subprocess items' => [
         ['strings', 'cannot', 'be', 'children'],
diff --git a/core/modules/migrate/tests/src/Unit/process/SubstrTest.php b/core/modules/migrate/tests/src/Unit/process/SubstrTest.php
index fa0db16e8a29..6ce82d60e3a3 100644
--- a/core/modules/migrate/tests/src/Unit/process/SubstrTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/SubstrTest.php
@@ -41,7 +41,7 @@ class SubstrTest extends MigrateProcessTestCase {
   /**
    * Data provider for testSubstr().
    */
-  public function providerTestSubstr() {
+  public static function providerTestSubstr() {
     return [
       // Tests with valid start and length values.
       [0, 7, 'Captain'],
diff --git a/core/modules/migrate/tests/src/Unit/process/UrlEncodeTest.php b/core/modules/migrate/tests/src/Unit/process/UrlEncodeTest.php
index 7cb29c2863fa..41d00eef0e27 100644
--- a/core/modules/migrate/tests/src/Unit/process/UrlEncodeTest.php
+++ b/core/modules/migrate/tests/src/Unit/process/UrlEncodeTest.php
@@ -28,7 +28,7 @@ class UrlEncodeTest extends MigrateTestCase {
    * @return array
    *   An array of URLs to test.
    */
-  public function urlDataProvider() {
+  public static function urlDataProvider() {
     return [
       'A URL with no characters requiring encoding' => ['http://example.com/normal_url.html', 'http://example.com/normal_url.html'],
       'The definitive use case - encoding spaces in URLs' => ['http://example.com/url with spaces.html', 'http://example.com/url%20with%20spaces.html'],
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/MigrateFieldPluginManagerTest.php b/core/modules/migrate_drupal/tests/src/Kernel/MigrateFieldPluginManagerTest.php
index ebd4df5be0e6..22028e41536a 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/MigrateFieldPluginManagerTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/MigrateFieldPluginManagerTest.php
@@ -83,7 +83,7 @@ class MigrateFieldPluginManagerTest extends MigrateDrupalTestBase {
    * @return array
    *   The data.
    */
-  public function nonExistentPluginExceptionsData() {
+  public static function nonExistentPluginExceptionsData() {
     return [
       'D7 Filefield' => [
         'core' => 7,
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/NodeMigrationTypePluginAlterTest.php b/core/modules/migrate_drupal/tests/src/Kernel/NodeMigrationTypePluginAlterTest.php
index 82707df98401..6873d04d3a52 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/NodeMigrationTypePluginAlterTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/NodeMigrationTypePluginAlterTest.php
@@ -51,7 +51,7 @@ class NodeMigrationTypePluginAlterTest extends MigrateTestBase {
   /**
    * Data provider for testMigrationPluginAlter().
    */
-  public function providerMigrationPluginAlter() {
+  public static function providerMigrationPluginAlter() {
     $tests = [];
 
     $migrations = [
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/ContentEntityConstructorTest.php b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/ContentEntityConstructorTest.php
index 12d2e362b3c2..b3a7cfba1418 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/ContentEntityConstructorTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/ContentEntityConstructorTest.php
@@ -40,7 +40,7 @@ class ContentEntityConstructorTest extends KernelTestBase {
   /**
    * Provides data for constructor tests.
    */
-  public function providerTestConstructor() {
+  public static function providerTestConstructor() {
     return [
       'entity type missing' => [
         [],
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/ContentEntityTest.php b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/ContentEntityTest.php
index 36fe385b02f3..2d07b5946b67 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/ContentEntityTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/ContentEntityTest.php
@@ -431,7 +431,7 @@ class ContentEntityTest extends KernelTestBase {
    * @see \Drupal\Tests\migrate_drupal\Kernel\Plugin\migrate\source\ContentEntityTest::testMediaSource
    * @see \Drupal\Tests\migrate_drupal\Kernel\Plugin\migrate\source\ContentEntityTest::testTermSource
    */
-  public function migrationConfigurationProvider() {
+  public static function migrationConfigurationProvider() {
     $data = [];
     foreach ([FALSE, TRUE] as $include_translations) {
       foreach ([FALSE, TRUE] as $add_revision_id) {
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/VariableMultiRowTest.php b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/VariableMultiRowTest.php
index 4dd904745912..39f2a0d89b53 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/VariableMultiRowTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/VariableMultiRowTest.php
@@ -23,7 +23,7 @@ class VariableMultiRowTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/VariableTest.php b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/VariableTest.php
index ab31ea15a776..2bcc8cc2fa9a 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/VariableTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/VariableTest.php
@@ -21,7 +21,7 @@ class VariableTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d6/VariableTranslationTest.php b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d6/VariableTranslationTest.php
index 803b3af8ea17..e3a74fbb6d8d 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d6/VariableTranslationTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d6/VariableTranslationTest.php
@@ -21,7 +21,7 @@ class VariableTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d7/VariableTranslationTest.php b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d7/VariableTranslationTest.php
index 3a9eb244498c..4021140cd2cf 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d7/VariableTranslationTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d7/VariableTranslationTest.php
@@ -21,7 +21,7 @@ class VariableTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d8/ConfigTest.php b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d8/ConfigTest.php
index 0cb0dcf5d844..d17d3d759d29 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d8/ConfigTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/source/d8/ConfigTest.php
@@ -20,7 +20,7 @@ class ConfigTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $data = [];
 
     // The source database tables.
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/d6/FieldDiscoveryTest.php b/core/modules/migrate_drupal/tests/src/Kernel/d6/FieldDiscoveryTest.php
index 58f19748a96c..04ab0b51324b 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/d6/FieldDiscoveryTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/d6/FieldDiscoveryTest.php
@@ -136,7 +136,7 @@ class FieldDiscoveryTest extends MigrateDrupal6TestBase {
    * @return array
    *   The data.
    */
-  public function addAllFieldProcessesAltersData() {
+  public static function addAllFieldProcessesAltersData() {
     return [
       'Field Formatter' => [
         'field_plugin_method' => 'alterFieldFormatterMigration',
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/d7/FieldDiscoveryTest.php b/core/modules/migrate_drupal/tests/src/Kernel/d7/FieldDiscoveryTest.php
index 12a0426a68fe..e0e95ade4e70 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/d7/FieldDiscoveryTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/d7/FieldDiscoveryTest.php
@@ -180,7 +180,7 @@ class FieldDiscoveryTest extends MigrateDrupal7TestBase {
    * @return array
    *   The data.
    */
-  public function addAllFieldProcessesAltersData() {
+  public static function addAllFieldProcessesAltersData() {
     return [
       'Field Instance' => [
         'field_plugin_method' => 'alterFieldInstanceMigration',
diff --git a/core/modules/migrate_drupal/tests/src/Kernel/d7/FollowUpMigrationsTest.php b/core/modules/migrate_drupal/tests/src/Kernel/d7/FollowUpMigrationsTest.php
index 1f0c1fd67336..5c0a518f9807 100644
--- a/core/modules/migrate_drupal/tests/src/Kernel/d7/FollowUpMigrationsTest.php
+++ b/core/modules/migrate_drupal/tests/src/Kernel/d7/FollowUpMigrationsTest.php
@@ -119,7 +119,7 @@ class FollowUpMigrationsTest extends MigrateDrupal7TestBase {
   /**
    * Data provider for testEntityReferenceTranslations().
    */
-  public function providerTestEntityReferenceTranslations() {
+  public static function providerTestEntityReferenceTranslations() {
     return [
       [
         ['d7_node', 'd7_node_translation'],
diff --git a/core/modules/migrate_drupal/tests/src/Unit/FieldDiscoveryTest.php b/core/modules/migrate_drupal/tests/src/Unit/FieldDiscoveryTest.php
index 1d32387523ee..9918dc4cbc4b 100644
--- a/core/modules/migrate_drupal/tests/src/Unit/FieldDiscoveryTest.php
+++ b/core/modules/migrate_drupal/tests/src/Unit/FieldDiscoveryTest.php
@@ -79,7 +79,7 @@ class FieldDiscoveryTest extends UnitTestCase {
    * @return array
    *   The data.
    */
-  public function getEntityFieldsData() {
+  public static function getEntityFieldsData() {
     return [
       'Node' => [
         'entity_type_id' => 'node',
@@ -156,7 +156,7 @@ class FieldDiscoveryTest extends UnitTestCase {
    * @return array
    *   The data.
    */
-  public function getBundleFieldsData() {
+  public static function getBundleFieldsData() {
     return [
       'Node - Content Type 1' => [
         'entity_type_id' => 'node',
@@ -242,7 +242,7 @@ class FieldDiscoveryTest extends UnitTestCase {
    * @return array
    *   The test data.
    */
-  public function getCoreVersionData() {
+  public static function getCoreVersionData() {
     return [
       'Drupal 7' => [
         'tags' => ['Drupal 7'],
@@ -331,7 +331,7 @@ class FieldDiscoveryTest extends UnitTestCase {
    * @return array
    *   The data.
    */
-  public function getFieldInstanceStubMigrationDefinition() {
+  public static function getFieldInstanceStubMigrationDefinition() {
     return [
       'Drupal 6' => [
         'core' => FieldDiscoveryInterface::DRUPAL_6,
diff --git a/core/modules/migrate_drupal/tests/src/Unit/MigrateFieldPluginManagerTest.php b/core/modules/migrate_drupal/tests/src/Unit/MigrateFieldPluginManagerTest.php
index 75c4853e3546..a5b1dd0ed887 100644
--- a/core/modules/migrate_drupal/tests/src/Unit/MigrateFieldPluginManagerTest.php
+++ b/core/modules/migrate_drupal/tests/src/Unit/MigrateFieldPluginManagerTest.php
@@ -51,7 +51,7 @@ class MigrateFieldPluginManagerTest extends UnitTestCase {
    * @return array
    *   The data.
    */
-  public function weightsData() {
+  public static function weightsData() {
     return [
       'Field 1, D6' => [
         'field_type' => 'field_1',
diff --git a/core/modules/migrate_drupal/tests/src/Unit/MigrationConfigurationTraitTest.php b/core/modules/migrate_drupal/tests/src/Unit/MigrationConfigurationTraitTest.php
index 042d9c85e53b..995fd63191eb 100644
--- a/core/modules/migrate_drupal/tests/src/Unit/MigrationConfigurationTraitTest.php
+++ b/core/modules/migrate_drupal/tests/src/Unit/MigrationConfigurationTraitTest.php
@@ -57,7 +57,7 @@ class MigrationConfigurationTraitTest extends UnitTestCase {
   /**
    * Provides data for testGetLegacyDrupalVersion.
    */
-  public function providerTestGetLegacyDrupalVersion() {
+  public static function providerTestGetLegacyDrupalVersion() {
     return [
       'D5' => [
         'expected_version_string' => '5',
diff --git a/core/modules/migrate_drupal/tests/src/Unit/MigrationStateUnitTest.php b/core/modules/migrate_drupal/tests/src/Unit/MigrationStateUnitTest.php
index 0b3808109b54..52d5a1209beb 100644
--- a/core/modules/migrate_drupal/tests/src/Unit/MigrationStateUnitTest.php
+++ b/core/modules/migrate_drupal/tests/src/Unit/MigrationStateUnitTest.php
@@ -91,7 +91,7 @@ class MigrationStateUnitTest extends UnitTestCase {
   /**
    * Data provider for testGetUpgradeStates.
    */
-  public function providerGetUpgradeStates() {
+  public static function providerGetUpgradeStates() {
 
     // Tests multiple scenarios:
     // Not enabled and not declared.
diff --git a/core/modules/migrate_drupal/tests/src/Unit/source/DrupalSqlBaseTest.php b/core/modules/migrate_drupal/tests/src/Unit/source/DrupalSqlBaseTest.php
index 8ce8b03e2acc..e18e8fbfe508 100644
--- a/core/modules/migrate_drupal/tests/src/Unit/source/DrupalSqlBaseTest.php
+++ b/core/modules/migrate_drupal/tests/src/Unit/source/DrupalSqlBaseTest.php
@@ -133,7 +133,7 @@ class DrupalSqlBaseTest extends MigrateTestCase {
   /**
    * Provides data for testMinimumVersion.
    */
-  public function providerMinimumVersion() {
+  public static function providerMinimumVersion() {
     return [
       'minimum less than schema' => [
         TRUE,
diff --git a/core/modules/migrate_drupal_ui/tests/src/Functional/CredentialFormTest.php b/core/modules/migrate_drupal_ui/tests/src/Functional/CredentialFormTest.php
index 275efc0a1a31..2f76cef37410 100644
--- a/core/modules/migrate_drupal_ui/tests/src/Functional/CredentialFormTest.php
+++ b/core/modules/migrate_drupal_ui/tests/src/Functional/CredentialFormTest.php
@@ -77,7 +77,7 @@ class CredentialFormTest extends MigrateUpgradeTestBase {
   /**
    * Data provider for testCredentialForm.
    */
-  public function providerCredentialForm() {
+  public static function providerCredentialForm() {
     return [
       [
         'path_to_database' => '/tests/fixtures/drupal6.php',
diff --git a/core/modules/migrate_drupal_ui/tests/src/Functional/SourceProviderTest.php b/core/modules/migrate_drupal_ui/tests/src/Functional/SourceProviderTest.php
index d70bdb156688..ae4ecc186e3a 100644
--- a/core/modules/migrate_drupal_ui/tests/src/Functional/SourceProviderTest.php
+++ b/core/modules/migrate_drupal_ui/tests/src/Functional/SourceProviderTest.php
@@ -55,7 +55,7 @@ class SourceProviderTest extends MigrateUpgradeTestBase {
   /**
    * Data provider for testSourceProvider.
    */
-  public function providerSourceProvider() {
+  public static function providerSourceProvider() {
     return [
       [
         'path_to_database' => '/tests/fixtures/drupal6.php',
diff --git a/core/modules/migrate_drupal_ui/tests/src/Functional/d7/FilePathTest.php b/core/modules/migrate_drupal_ui/tests/src/Functional/d7/FilePathTest.php
index 80a3c9cbf70d..4df342f58a64 100644
--- a/core/modules/migrate_drupal_ui/tests/src/Functional/d7/FilePathTest.php
+++ b/core/modules/migrate_drupal_ui/tests/src/Functional/d7/FilePathTest.php
@@ -165,7 +165,7 @@ class FilePathTest extends MigrateUpgradeTestBase {
    * @return string[][]
    *   An array of test data.
    */
-  public function providerTestFilePath() {
+  public static function providerTestFilePath() {
     return [
       'All source base paths are at temporary' => [
         'sites/default/private',
diff --git a/core/modules/migrate_drupal_ui/tests/src/FunctionalJavascript/SettingsTest.php b/core/modules/migrate_drupal_ui/tests/src/FunctionalJavascript/SettingsTest.php
index 7ae0a1951c00..796de8ce1591 100644
--- a/core/modules/migrate_drupal_ui/tests/src/FunctionalJavascript/SettingsTest.php
+++ b/core/modules/migrate_drupal_ui/tests/src/FunctionalJavascript/SettingsTest.php
@@ -141,7 +141,7 @@ class SettingsTest extends WebDriverTestBase {
   /**
    * Data provider for testCredentialForm.
    */
-  public function providerTestCredentialForm() {
+  public static function providerTestCredentialForm() {
     return [
       'no values in settings.php' => [
         'source_connection' => "",
diff --git a/core/modules/mysql/tests/src/Unit/ConnectionTest.php b/core/modules/mysql/tests/src/Unit/ConnectionTest.php
index a3c0f50f064e..80104ab2b977 100644
--- a/core/modules/mysql/tests/src/Unit/ConnectionTest.php
+++ b/core/modules/mysql/tests/src/Unit/ConnectionTest.php
@@ -99,7 +99,7 @@ class ConnectionTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerVersionAndIsMariaDb(): array {
+  public static function providerVersionAndIsMariaDb(): array {
     return [
       // MariaDB.
       [
diff --git a/core/modules/mysql/tests/src/Unit/InstallTasksTest.php b/core/modules/mysql/tests/src/Unit/InstallTasksTest.php
index 0abcef6e6b99..552c7240ae41 100644
--- a/core/modules/mysql/tests/src/Unit/InstallTasksTest.php
+++ b/core/modules/mysql/tests/src/Unit/InstallTasksTest.php
@@ -112,7 +112,7 @@ class InstallTasksTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerNameAndMinimumVersion(): array {
+  public static function providerNameAndMinimumVersion(): array {
     return [
       [
         TRUE,
diff --git a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeByNodeTypeTest.php b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeByNodeTypeTest.php
index e8e466806c3c..163bfc5ce10f 100644
--- a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeByNodeTypeTest.php
+++ b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeByNodeTypeTest.php
@@ -23,7 +23,7 @@ class NodeByNodeTypeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeRevisionByNodeTypeTest.php b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeRevisionByNodeTypeTest.php
index 2829c6a65600..2acd88396580 100644
--- a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeRevisionByNodeTypeTest.php
+++ b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeRevisionByNodeTypeTest.php
@@ -23,7 +23,7 @@ class NodeRevisionByNodeTypeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeRevisionTest.php b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeRevisionTest.php
index 770f5142edbd..114baf6726a1 100644
--- a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeRevisionTest.php
+++ b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeRevisionTest.php
@@ -23,7 +23,7 @@ class NodeRevisionTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTest.php b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTest.php
index 44b93d255f9f..6ee22aeb4dac 100644
--- a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTest.php
+++ b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTest.php
@@ -23,7 +23,7 @@ class NodeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTranslationTest.php b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTranslationTest.php
index 732d540d2cf6..9ab02f34ebc3 100644
--- a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTranslationTest.php
+++ b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTranslationTest.php
@@ -21,7 +21,7 @@ class NodeTranslationTest extends NodeTest {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     // Get the source data from parent.
     $tests = parent::providerSource();
 
diff --git a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTypeTest.php b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTypeTest.php
index bd349c6113c7..1ca146017a3e 100644
--- a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTypeTest.php
+++ b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/NodeTypeTest.php
@@ -21,7 +21,7 @@ class NodeTypeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/ViewModeTest.php b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/ViewModeTest.php
index e818cbee0000..e36899b62415 100644
--- a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/ViewModeTest.php
+++ b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d6/ViewModeTest.php
@@ -21,7 +21,7 @@ class ViewModeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeEntityTranslationTest.php b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeEntityTranslationTest.php
index c1658b8efe7d..bb14427419b8 100644
--- a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeEntityTranslationTest.php
+++ b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeEntityTranslationTest.php
@@ -23,7 +23,7 @@ class NodeEntityTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTest.php b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTest.php
index 760b275a6c8c..481ae900d100 100644
--- a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTest.php
+++ b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTest.php
@@ -23,7 +23,7 @@ class NodeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // Test retrieval of article and page content types when configuration
diff --git a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTranslationTest.php b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTranslationTest.php
index 590ec76a8bca..4e77be438d9f 100644
--- a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTranslationTest.php
+++ b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTranslationTest.php
@@ -21,7 +21,7 @@ class NodeTranslationTest extends NodeTest {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     // Get the source data from parent.
     $tests = parent::providerSource();
 
diff --git a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTypeTest.php b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTypeTest.php
index 45f054110af5..4b8950901235 100644
--- a/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTypeTest.php
+++ b/core/modules/node/tests/src/Kernel/Plugin/migrate/source/d7/NodeTypeTest.php
@@ -21,7 +21,7 @@ class NodeTypeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/node/tests/src/Unit/NodeOperationAccessTest.php b/core/modules/node/tests/src/Unit/NodeOperationAccessTest.php
index d09572235f3f..6e094dfa505a 100644
--- a/core/modules/node/tests/src/Unit/NodeOperationAccessTest.php
+++ b/core/modules/node/tests/src/Unit/NodeOperationAccessTest.php
@@ -129,7 +129,7 @@ class NodeOperationAccessTest extends UnitTestCase {
    * @return array
    *   Data for testing.
    */
-  public function providerTestRevisionOperations() {
+  public static function providerTestRevisionOperations() {
     $data = [];
 
     // Tests 'bypass node access' never works on revision operations.
diff --git a/core/modules/node/tests/src/Unit/PageCache/DenyNodePreviewTest.php b/core/modules/node/tests/src/Unit/PageCache/DenyNodePreviewTest.php
index 4e58aa7b59fe..9234489298ee 100644
--- a/core/modules/node/tests/src/Unit/PageCache/DenyNodePreviewTest.php
+++ b/core/modules/node/tests/src/Unit/PageCache/DenyNodePreviewTest.php
@@ -77,7 +77,7 @@ class DenyNodePreviewTest extends UnitTestCase {
    * @return array
    *   Data and expected results.
    */
-  public function providerPrivateImageStyleDownloadPolicy() {
+  public static function providerPrivateImageStyleDownloadPolicy() {
     return [
       [ResponsePolicyInterface::DENY, 'entity.node.preview'],
       [NULL, 'some.other.route'],
diff --git a/core/modules/options/tests/src/FunctionalJavascript/OptionsFieldUITest.php b/core/modules/options/tests/src/FunctionalJavascript/OptionsFieldUITest.php
index 61df5dd91af0..0e09410257ef 100644
--- a/core/modules/options/tests/src/FunctionalJavascript/OptionsFieldUITest.php
+++ b/core/modules/options/tests/src/FunctionalJavascript/OptionsFieldUITest.php
@@ -340,7 +340,7 @@ JS;
    *   - The method which should be used to add another row to the table. The
    *     possible values are 'Press button', 'Enter button' or 'Enter element'.
    */
-  public function providerTestOptionsAllowedValues() {
+  public static function providerTestOptionsAllowedValues() {
     $type_cases = [
       'List integer' => [
         'list_integer',
diff --git a/core/modules/path/tests/src/Kernel/Plugin/migrate/source/d6/UrlAliasTest.php b/core/modules/path/tests/src/Kernel/Plugin/migrate/source/d6/UrlAliasTest.php
index 4cfe6d12268f..1ce15b47417f 100644
--- a/core/modules/path/tests/src/Kernel/Plugin/migrate/source/d6/UrlAliasTest.php
+++ b/core/modules/path/tests/src/Kernel/Plugin/migrate/source/d6/UrlAliasTest.php
@@ -20,7 +20,7 @@ class UrlAliasTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/path/tests/src/Kernel/Plugin/migrate/source/d7/UrlAliasTest.php b/core/modules/path/tests/src/Kernel/Plugin/migrate/source/d7/UrlAliasTest.php
index 191b0794d962..b0db55a3175b 100644
--- a/core/modules/path/tests/src/Kernel/Plugin/migrate/source/d7/UrlAliasTest.php
+++ b/core/modules/path/tests/src/Kernel/Plugin/migrate/source/d7/UrlAliasTest.php
@@ -20,7 +20,7 @@ class UrlAliasTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/path/tests/src/Unit/migrate/process/PathSetTranslatedTest.php b/core/modules/path/tests/src/Unit/migrate/process/PathSetTranslatedTest.php
index 7f234ec6b3b7..03ece19d9d84 100644
--- a/core/modules/path/tests/src/Unit/migrate/process/PathSetTranslatedTest.php
+++ b/core/modules/path/tests/src/Unit/migrate/process/PathSetTranslatedTest.php
@@ -40,7 +40,7 @@ class PathSetTranslatedTest extends MigrateProcessTestCase {
    * @return array
    *   The data.
    */
-  public function transformDataProvider() {
+  public static function transformDataProvider() {
     return [
       'non-node-path' => [
         'path' => '/non-node-path',
diff --git a/core/modules/path_alias/tests/src/Unit/PathProcessor/AliasPathProcessorTest.php b/core/modules/path_alias/tests/src/Unit/PathProcessor/AliasPathProcessorTest.php
index d0789615701f..12ab0711dc50 100644
--- a/core/modules/path_alias/tests/src/Unit/PathProcessor/AliasPathProcessorTest.php
+++ b/core/modules/path_alias/tests/src/Unit/PathProcessor/AliasPathProcessorTest.php
@@ -83,7 +83,7 @@ class AliasPathProcessorTest extends UnitTestCase {
   /**
    * @return array
    */
-  public function providerTestProcessOutbound() {
+  public static function providerTestProcessOutbound() {
     return [
       ['internal-url', [], 'url-alias'],
       ['internal-url', ['alias' => TRUE], 'internal-url'],
diff --git a/core/modules/pgsql/tests/src/Unit/SchemaTest.php b/core/modules/pgsql/tests/src/Unit/SchemaTest.php
index 40317a9fa17c..1514d1a14ad9 100644
--- a/core/modules/pgsql/tests/src/Unit/SchemaTest.php
+++ b/core/modules/pgsql/tests/src/Unit/SchemaTest.php
@@ -49,7 +49,7 @@ class SchemaTest extends UnitTestCase {
   /**
    * Data provider for ::testComputedConstraintName().
    */
-  public function providerComputedConstraintName() {
+  public static function providerComputedConstraintName() {
     return [
       ['user_field_data', 'pkey', 'user_field_data____pkey'],
       ['user_field_data', 'name__key', 'user_field_data__name__key'],
diff --git a/core/modules/phpass/tests/src/Unit/PasswordVerifyTest.php b/core/modules/phpass/tests/src/Unit/PasswordVerifyTest.php
index 92ff768a5ed8..3bb25198750d 100644
--- a/core/modules/phpass/tests/src/Unit/PasswordVerifyTest.php
+++ b/core/modules/phpass/tests/src/Unit/PasswordVerifyTest.php
@@ -143,7 +143,7 @@ class PasswordVerifyTest extends UnitTestCase {
   /**
    * Provides the test matrix for testLongPassword().
    */
-  public function providerLongPasswords() {
+  public static function providerLongPasswords() {
     // '512 byte long password is allowed.'
     $passwords['allowed'] = [str_repeat('x', PasswordInterface::PASSWORD_MAX_LENGTH), TRUE];
     // 513 byte long password is not allowed.
diff --git a/core/modules/responsive_image/tests/src/Kernel/Plugin/migrate/source/d7/ResponsiveImageStylesTest.php b/core/modules/responsive_image/tests/src/Kernel/Plugin/migrate/source/d7/ResponsiveImageStylesTest.php
index b89b4b435ad0..d87783a3f57f 100644
--- a/core/modules/responsive_image/tests/src/Kernel/Plugin/migrate/source/d7/ResponsiveImageStylesTest.php
+++ b/core/modules/responsive_image/tests/src/Kernel/Plugin/migrate/source/d7/ResponsiveImageStylesTest.php
@@ -23,7 +23,7 @@ class ResponsiveImageStylesTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/rest/tests/src/Kernel/Entity/ConfigDependenciesTest.php b/core/modules/rest/tests/src/Kernel/Entity/ConfigDependenciesTest.php
index e854cb71cc0b..ffd7bc7f8495 100644
--- a/core/modules/rest/tests/src/Kernel/Entity/ConfigDependenciesTest.php
+++ b/core/modules/rest/tests/src/Kernel/Entity/ConfigDependenciesTest.php
@@ -56,7 +56,7 @@ class ConfigDependenciesTest extends KernelTestBase {
    *   An array with numerical keys:
    *   0. The original REST resource configuration.
    */
-  public function providerBasicDependencies() {
+  public static function providerBasicDependencies() {
     return [
       'method' => [
         [
@@ -151,7 +151,7 @@ class ConfigDependenciesTest extends KernelTestBase {
    *   1. The module to uninstall (the dependency that is about to be removed).
    *   2. The expected configuration after uninstalling this module.
    */
-  public function providerOnDependencyRemovalForResourceGranularity() {
+  public static function providerOnDependencyRemovalForResourceGranularity() {
     return [
       'resource with multiple formats' => [
         [
diff --git a/core/modules/rest/tests/src/Unit/EventSubscriber/ResourceResponseSubscriberTest.php b/core/modules/rest/tests/src/Unit/EventSubscriber/ResourceResponseSubscriberTest.php
index 6234c72b7a5e..f51ff6e4e9a6 100644
--- a/core/modules/rest/tests/src/Unit/EventSubscriber/ResourceResponseSubscriberTest.php
+++ b/core/modules/rest/tests/src/Unit/EventSubscriber/ResourceResponseSubscriberTest.php
@@ -53,7 +53,7 @@ class ResourceResponseSubscriberTest extends UnitTestCase {
     $this->assertEquals($expected_response !== FALSE ? $expected_response : Json::encode($data), $event->getResponse()->getContent());
   }
 
-  public function providerTestSerialization() {
+  public static function providerTestSerialization() {
     return [
       // The default data for \Drupal\rest\ResourceResponse.
       'default' => [NULL, ''],
@@ -218,7 +218,7 @@ class ResourceResponseSubscriberTest extends UnitTestCase {
    *   6. expected response content type
    *   7. expected response body
    */
-  public function providerTestResponseFormat() {
+  public static function providerTestResponseFormat() {
     $json_encoded = Json::encode(['REST' => 'Drupal']);
     $xml_encoded = "<?xml version=\"1.0\"?>\n<response><REST>Drupal</REST></response>\n";
 
diff --git a/core/modules/sdc/tests/src/Unit/ComponentMetadataTest.php b/core/modules/sdc/tests/src/Unit/ComponentMetadataTest.php
index 3b1f439a2fd9..d486eda26b6c 100644
--- a/core/modules/sdc/tests/src/Unit/ComponentMetadataTest.php
+++ b/core/modules/sdc/tests/src/Unit/ComponentMetadataTest.php
@@ -54,7 +54,7 @@ final class ComponentMetadataTest extends UnitTestCaseTest {
    * @return array[]
    *   The batches of data.
    */
-  public function dataProviderMetadata(): array {
+  public static function dataProviderMetadata(): array {
     return [
       'minimal example without schemas' => [
         [
diff --git a/core/modules/sdc/tests/src/Unit/SchemaCompatibilityCheckerTest.php b/core/modules/sdc/tests/src/Unit/SchemaCompatibilityCheckerTest.php
index 142c7939c45d..7f542b209ef6 100644
--- a/core/modules/sdc/tests/src/Unit/SchemaCompatibilityCheckerTest.php
+++ b/core/modules/sdc/tests/src/Unit/SchemaCompatibilityCheckerTest.php
@@ -50,7 +50,7 @@ final class SchemaCompatibilityCheckerTest extends UnitTestCase {
    * @return array[]
    *   The batches of data.
    */
-  public function dataProviderIsCompatible(): array {
+  public static function dataProviderIsCompatible(): array {
     $schema = [
       'type' => 'object',
       'required' => ['text'],
diff --git a/core/modules/sdc/tests/src/Unit/UtilitiesTest.php b/core/modules/sdc/tests/src/Unit/UtilitiesTest.php
index 04cd8f7d2cc0..ce10ba880655 100644
--- a/core/modules/sdc/tests/src/Unit/UtilitiesTest.php
+++ b/core/modules/sdc/tests/src/Unit/UtilitiesTest.php
@@ -27,7 +27,7 @@ final class UtilitiesTest extends TestCase {
     );
   }
 
-  public function dataProviderIsRenderArray() {
+  public static function dataProviderIsRenderArray() {
     return [
       'valid markup render array' => [['#markup' => 'hello world'], TRUE],
       'invalid "foo" string' => [['foo', '#markup' => 'hello world'], FALSE],
diff --git a/core/modules/search/tests/src/Kernel/Migrate/d6/SearchPageTest.php b/core/modules/search/tests/src/Kernel/Migrate/d6/SearchPageTest.php
index 42eb9f6bf7b1..f72dc0635479 100644
--- a/core/modules/search/tests/src/Kernel/Migrate/d6/SearchPageTest.php
+++ b/core/modules/search/tests/src/Kernel/Migrate/d6/SearchPageTest.php
@@ -20,7 +20,7 @@ class SearchPageTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests[0]['source_data'] = [
       'variable' => [
         [
diff --git a/core/modules/search/tests/src/Kernel/Migrate/d7/SearchPageTest.php b/core/modules/search/tests/src/Kernel/Migrate/d7/SearchPageTest.php
index 24f040d834e6..5c6bdea99045 100644
--- a/core/modules/search/tests/src/Kernel/Migrate/d7/SearchPageTest.php
+++ b/core/modules/search/tests/src/Kernel/Migrate/d7/SearchPageTest.php
@@ -20,7 +20,7 @@ class SearchPageTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests[0]['source_data'] = [
       'variable' => [
         [
diff --git a/core/modules/serialization/tests/src/Kernel/FieldItemSerializationTest.php b/core/modules/serialization/tests/src/Kernel/FieldItemSerializationTest.php
index 0eb95961e053..8726d9bd0da0 100644
--- a/core/modules/serialization/tests/src/Kernel/FieldItemSerializationTest.php
+++ b/core/modules/serialization/tests/src/Kernel/FieldItemSerializationTest.php
@@ -213,7 +213,7 @@ class FieldItemSerializationTest extends NormalizerTestBase {
    * @return array
    *   Test cases.
    */
-  public function providerTestCustomBooleanNormalization() {
+  public static function providerTestCustomBooleanNormalization() {
     return [
       'Format-agnostic @FieldType-level normalizers SHOULD be able to affect the format-agnostic normalization' => [
         ['test_fieldtype_boolean_emoji_normalizer'],
diff --git a/core/modules/serialization/tests/src/Unit/Normalizer/DateTimeIso8601NormalizerTest.php b/core/modules/serialization/tests/src/Unit/Normalizer/DateTimeIso8601NormalizerTest.php
index 4676ea218b09..a3e41b71a0f9 100644
--- a/core/modules/serialization/tests/src/Unit/Normalizer/DateTimeIso8601NormalizerTest.php
+++ b/core/modules/serialization/tests/src/Unit/Normalizer/DateTimeIso8601NormalizerTest.php
@@ -153,7 +153,7 @@ class DateTimeIso8601NormalizerTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestNormalize() {
+  public static function providerTestNormalize() {
     return [
       // @see \Drupal\datetime\Plugin\Field\FieldType\DateTimeItem::DATETIME_TYPE_DATE
       'datetime field, configured to store only date: must be handled by DateTimeIso8601Normalizer' => [
@@ -197,7 +197,7 @@ class DateTimeIso8601NormalizerTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestDenormalizeValidFormats() {
+  public static function providerTestDenormalizeValidFormats() {
     $data = [];
     $data['just a date'] = ['date-only', '2016-11-06', '2016-11-06'];
 
diff --git a/core/modules/serialization/tests/src/Unit/Normalizer/DateTimeNormalizerTest.php b/core/modules/serialization/tests/src/Unit/Normalizer/DateTimeNormalizerTest.php
index c229ee6f56b2..72cbcf1928bb 100644
--- a/core/modules/serialization/tests/src/Unit/Normalizer/DateTimeNormalizerTest.php
+++ b/core/modules/serialization/tests/src/Unit/Normalizer/DateTimeNormalizerTest.php
@@ -121,7 +121,7 @@ class DateTimeNormalizerTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestDenormalizeValidFormats() {
+  public static function providerTestDenormalizeValidFormats() {
     $data = [];
 
     $data['RFC3339'] = ['2016-11-06T09:02:00+00:00', new \DateTimeImmutable('2016-11-06T09:02:00+00:00')];
@@ -152,7 +152,7 @@ class DateTimeNormalizerTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestDenormalizeUserFormats() {
+  public static function providerTestDenormalizeUserFormats() {
     $data = [];
 
     $data['Y/m/d H:i:s P'] = ['2016/11/06 09:02:00 +00:00', 'Y/m/d H:i:s P', new \DateTimeImmutable('2016-11-06T09:02:00+00:00')];
diff --git a/core/modules/serialization/tests/src/Unit/Normalizer/NormalizerBaseTest.php b/core/modules/serialization/tests/src/Unit/Normalizer/NormalizerBaseTest.php
index c07224e4f1c5..f4ed459598c2 100644
--- a/core/modules/serialization/tests/src/Unit/Normalizer/NormalizerBaseTest.php
+++ b/core/modules/serialization/tests/src/Unit/Normalizer/NormalizerBaseTest.php
@@ -41,7 +41,7 @@ class NormalizerBaseTest extends UnitTestCase {
    * @return array
    *   An array of provider data for testSupportsNormalization.
    */
-  public function providerTestSupportsNormalization() {
+  public static function providerTestSupportsNormalization() {
     return [
       // Something that is not an object should return FALSE immediately.
       [FALSE, []],
diff --git a/core/modules/serialization/tests/src/Unit/Normalizer/PrimitiveDataNormalizerTest.php b/core/modules/serialization/tests/src/Unit/Normalizer/PrimitiveDataNormalizerTest.php
index c32bbf8adf04..f7107fecfcf7 100644
--- a/core/modules/serialization/tests/src/Unit/Normalizer/PrimitiveDataNormalizerTest.php
+++ b/core/modules/serialization/tests/src/Unit/Normalizer/PrimitiveDataNormalizerTest.php
@@ -60,7 +60,7 @@ class PrimitiveDataNormalizerTest extends UnitTestCase {
   /**
    * Data provider for testNormalize().
    */
-  public function dataProviderPrimitiveData() {
+  public static function dataProviderPrimitiveData() {
     $data = [];
 
     $definition = DataDefinition::createFromDataType('string');
diff --git a/core/modules/serialization/tests/src/Unit/Normalizer/TimestampNormalizerTest.php b/core/modules/serialization/tests/src/Unit/Normalizer/TimestampNormalizerTest.php
index 2023a4d8c704..f64f9c8e0101 100644
--- a/core/modules/serialization/tests/src/Unit/Normalizer/TimestampNormalizerTest.php
+++ b/core/modules/serialization/tests/src/Unit/Normalizer/TimestampNormalizerTest.php
@@ -101,7 +101,7 @@ class TimestampNormalizerTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestDenormalizeValidFormats() {
+  public static function providerTestDenormalizeValidFormats() {
     $expected_stamp = 1478422920;
 
     $data = [];
diff --git a/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutSetTest.php b/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutSetTest.php
index 302f80dbe658..685f4e673c1c 100644
--- a/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutSetTest.php
+++ b/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutSetTest.php
@@ -21,7 +21,7 @@ class ShortcutSetTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutSetUsersTest.php b/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutSetUsersTest.php
index 5dc83f79ef9b..de8ca9822d98 100644
--- a/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutSetUsersTest.php
+++ b/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutSetUsersTest.php
@@ -21,7 +21,7 @@ class ShortcutSetUsersTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutTest.php b/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutTest.php
index afd1e1d9651e..adebced8ad46 100644
--- a/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutTest.php
+++ b/core/modules/shortcut/tests/src/Kernel/Plugin/migrate/source/d7/ShortcutTest.php
@@ -21,7 +21,7 @@ class ShortcutTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/shortcut/tests/src/Unit/Menu/ShortcutLocalTasksTest.php b/core/modules/shortcut/tests/src/Unit/Menu/ShortcutLocalTasksTest.php
index ea8e975c7a06..a95d723f7985 100644
--- a/core/modules/shortcut/tests/src/Unit/Menu/ShortcutLocalTasksTest.php
+++ b/core/modules/shortcut/tests/src/Unit/Menu/ShortcutLocalTasksTest.php
@@ -48,7 +48,7 @@ class ShortcutLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getShortcutPageRoutes() {
+  public static function getShortcutPageRoutes() {
     return [
       ['entity.user.canonical'],
       ['entity.user.edit_form'],
diff --git a/core/modules/sqlite/tests/src/Unit/ConnectionTest.php b/core/modules/sqlite/tests/src/Unit/ConnectionTest.php
index 37e3062d5e24..28ae34ab925f 100644
--- a/core/modules/sqlite/tests/src/Unit/ConnectionTest.php
+++ b/core/modules/sqlite/tests/src/Unit/ConnectionTest.php
@@ -39,7 +39,7 @@ class ConnectionTest extends UnitTestCase {
    *   - SQLite database URL
    *   - Expected database connection option
    */
-  public function providerCreateConnectionOptionsFromUrl(): array {
+  public static function providerCreateConnectionOptionsFromUrl(): array {
     $root = dirname(__DIR__, 8);
     return [
       'sqlite relative path' => ['sqlite://localhost/tmp/test', $root . '/tmp/test'],
diff --git a/core/modules/statistics/tests/src/Kernel/Plugin/migrate/source/NodeCounterTest.php b/core/modules/statistics/tests/src/Kernel/Plugin/migrate/source/NodeCounterTest.php
index f2a64c44161e..f726df79168c 100644
--- a/core/modules/statistics/tests/src/Kernel/Plugin/migrate/source/NodeCounterTest.php
+++ b/core/modules/statistics/tests/src/Kernel/Plugin/migrate/source/NodeCounterTest.php
@@ -21,7 +21,7 @@ class NodeCounterTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/statistics/tests/src/Unit/StatisticsViewsResultTest.php b/core/modules/statistics/tests/src/Unit/StatisticsViewsResultTest.php
index c811fcfd3d46..d7cd9a4eb779 100644
--- a/core/modules/statistics/tests/src/Unit/StatisticsViewsResultTest.php
+++ b/core/modules/statistics/tests/src/Unit/StatisticsViewsResultTest.php
@@ -27,7 +27,7 @@ class StatisticsViewsResultTest extends UnitTestCase {
     $this->assertSame((int) $timestamp, $statistics->getTimestamp());
   }
 
-  public function providerTestStatisticsCount() {
+  public static function providerTestStatisticsCount() {
     return [
       [2, 0, 1421727536],
       [1, 0, 1471428059],
diff --git a/core/modules/system/tests/modules/entity_test/tests/src/Functional/Rest/EntityTestTextItemNormalizerTest.php b/core/modules/system/tests/modules/entity_test/tests/src/Functional/Rest/EntityTestTextItemNormalizerTest.php
index 9bd6c2ec63a9..cb646e0b55c7 100644
--- a/core/modules/system/tests/modules/entity_test/tests/src/Functional/Rest/EntityTestTextItemNormalizerTest.php
+++ b/core/modules/system/tests/modules/entity_test/tests/src/Functional/Rest/EntityTestTextItemNormalizerTest.php
@@ -183,7 +183,7 @@ class EntityTestTextItemNormalizerTest extends EntityTestResourceTestBase {
     $this->assertEqualsCanonicalizing($expected_cache_tags, explode(' ', $response->getHeader('X-Drupal-Cache-Tags')[0]));
   }
 
-  public function providerTestGetWithFormat() {
+  public static function providerTestGetWithFormat() {
     return [
       'format specified (different from fallback format)' => [
         'pablo',
diff --git a/core/modules/system/tests/src/Functional/Datetime/TimeZoneAbbreviationRouteTest.php b/core/modules/system/tests/src/Functional/Datetime/TimeZoneAbbreviationRouteTest.php
index ab2e482b27f3..732ffd004c6e 100644
--- a/core/modules/system/tests/src/Functional/Datetime/TimeZoneAbbreviationRouteTest.php
+++ b/core/modules/system/tests/src/Functional/Datetime/TimeZoneAbbreviationRouteTest.php
@@ -64,7 +64,7 @@ class TimeZoneAbbreviationRouteTest extends BrowserTestBase {
    * @return array
    *   Test scenarios.
    */
-  public function providerAbbreviationConversion() {
+  public static function providerAbbreviationConversion() {
     return [
       'valid, default offset' => [
         'CST/0/0',
diff --git a/core/modules/system/tests/src/Functional/Theme/ThemeUiTest.php b/core/modules/system/tests/src/Functional/Theme/ThemeUiTest.php
index f7ea323cc983..ee7f08110853 100644
--- a/core/modules/system/tests/src/Functional/Theme/ThemeUiTest.php
+++ b/core/modules/system/tests/src/Functional/Theme/ThemeUiTest.php
@@ -211,7 +211,7 @@ class ThemeUiTest extends BrowserTestBase {
    *   An array of arrays. Details on the specific elements can be found in the
    *   function body.
    */
-  public function providerTestThemeInstallWithModuleDependencies() {
+  public static function providerTestThemeInstallWithModuleDependencies() {
     // Data provider values with the following keys:
     // -'theme_name': The name of the theme being tested.
     // -'first_modules': Array of module machine names to enable first.
diff --git a/core/modules/system/tests/src/Functional/UpdateSystem/UpdateScriptTest.php b/core/modules/system/tests/src/Functional/UpdateSystem/UpdateScriptTest.php
index bf426a83ad35..89340c0ca21e 100644
--- a/core/modules/system/tests/src/Functional/UpdateSystem/UpdateScriptTest.php
+++ b/core/modules/system/tests/src/Functional/UpdateSystem/UpdateScriptTest.php
@@ -277,7 +277,7 @@ class UpdateScriptTest extends BrowserTestBase {
   /**
    * Date provider for testExtensionCompatibilityChange().
    */
-  public function providerExtensionCompatibilityChange() {
+  public static function providerExtensionCompatibilityChange() {
     $incompatible_module_message = "The following module is installed, but it is incompatible with Drupal " . \Drupal::VERSION . ":";
     $incompatible_theme_message = "The following theme is installed, but it is incompatible with Drupal " . \Drupal::VERSION . ":";
     return [
@@ -551,7 +551,7 @@ class UpdateScriptTest extends BrowserTestBase {
    * @return array[]
    *   Set of test cases to pass to the test method.
    */
-  public function providerMissingExtension(): array {
+  public static function providerMissingExtension(): array {
     return [
       'core only' => [
         'core' => [
diff --git a/core/modules/system/tests/src/FunctionalJavascript/ThemeSettingsFormTest.php b/core/modules/system/tests/src/FunctionalJavascript/ThemeSettingsFormTest.php
index 8ad55fce4db8..0b8da7ad4443 100644
--- a/core/modules/system/tests/src/FunctionalJavascript/ThemeSettingsFormTest.php
+++ b/core/modules/system/tests/src/FunctionalJavascript/ThemeSettingsFormTest.php
@@ -75,7 +75,7 @@ class ThemeSettingsFormTest extends WebDriverTestBase {
   /**
    * Provides test data for ::testFormSettingsSubmissionHandler().
    */
-  public function providerTestFormSettingsSubmissionHandler() {
+  public static function providerTestFormSettingsSubmissionHandler() {
     return [
       'test theme.theme' => ['test_theme_theme'],
       'test theme-settings.php' => ['test_theme_settings'],
diff --git a/core/modules/system/tests/src/Kernel/Block/SystemMenuBlockTest.php b/core/modules/system/tests/src/Kernel/Block/SystemMenuBlockTest.php
index a09d42b40219..ccbbb8bc0fcb 100644
--- a/core/modules/system/tests/src/Kernel/Block/SystemMenuBlockTest.php
+++ b/core/modules/system/tests/src/Kernel/Block/SystemMenuBlockTest.php
@@ -314,7 +314,7 @@ class SystemMenuBlockTest extends KernelTestBase {
   /**
    * @return array
    */
-  public function configExpandedTestCases() {
+  public static function configExpandedTestCases() {
     return [
       'All levels' => [
         'example5',
diff --git a/core/modules/system/tests/src/Kernel/DateFormatAccessControlHandlerTest.php b/core/modules/system/tests/src/Kernel/DateFormatAccessControlHandlerTest.php
index d63f44fccb14..e4cb0506e3f7 100644
--- a/core/modules/system/tests/src/Kernel/DateFormatAccessControlHandlerTest.php
+++ b/core/modules/system/tests/src/Kernel/DateFormatAccessControlHandlerTest.php
@@ -80,7 +80,7 @@ class DateFormatAccessControlHandlerTest extends KernelTestBase {
     static::assertEquals($create_access_result, $this->accessControlHandler->createAccess(NULL, $user, [], TRUE));
   }
 
-  public function testAccessProvider() {
+  public static function testAccessProvider() {
     $c = new ContainerBuilder();
     $cache_contexts_manager = (new Prophet())->prophesize(CacheContextsManager::class);
     $cache_contexts_manager->assertValidTokens()->willReturn(TRUE);
diff --git a/core/modules/system/tests/src/Kernel/Entity/EntityReferenceSelectionReferenceableTest.php b/core/modules/system/tests/src/Kernel/Entity/EntityReferenceSelectionReferenceableTest.php
index 254273c2e642..d9be4d2a1e00 100644
--- a/core/modules/system/tests/src/Kernel/Entity/EntityReferenceSelectionReferenceableTest.php
+++ b/core/modules/system/tests/src/Kernel/Entity/EntityReferenceSelectionReferenceableTest.php
@@ -141,7 +141,7 @@ class EntityReferenceSelectionReferenceableTest extends KernelTestBase {
    *
    * @return array[]
    */
-  public function providerTestCases() {
+  public static function providerTestCases() {
     return [
       // All referenceables, no limit. Expecting 9 items.
       [NULL, 'CONTAINS', 0, 9, static::$labels, 9],
diff --git a/core/modules/system/tests/src/Kernel/Installer/InstallTranslationFilePatternTest.php b/core/modules/system/tests/src/Kernel/Installer/InstallTranslationFilePatternTest.php
index 3942882d40f3..6e2b9e094ba6 100644
--- a/core/modules/system/tests/src/Kernel/Installer/InstallTranslationFilePatternTest.php
+++ b/core/modules/system/tests/src/Kernel/Installer/InstallTranslationFilePatternTest.php
@@ -48,7 +48,7 @@ class InstallTranslationFilePatternTest extends KernelTestBase {
   /**
    * @return array
    */
-  public function providerValidTranslationFiles() {
+  public static function providerValidTranslationFiles() {
     return [
       ['hu', 'drupal-8.0.0-alpha1.hu.po'],
       ['ta', 'drupal-8.10.10-beta12.ta.po'],
@@ -67,7 +67,7 @@ class InstallTranslationFilePatternTest extends KernelTestBase {
   /**
    * @return array
    */
-  public function providerInvalidTranslationFiles() {
+  public static function providerInvalidTranslationFiles() {
     return [
       ['hu', 'drupal-alpha1-*-hu.po'],
       ['ta', 'drupal-beta12.ta'],
diff --git a/core/modules/system/tests/src/Kernel/Plugin/migrate/source/ActionTest.php b/core/modules/system/tests/src/Kernel/Plugin/migrate/source/ActionTest.php
index 69e47096eb78..c2738b133595 100644
--- a/core/modules/system/tests/src/Kernel/Plugin/migrate/source/ActionTest.php
+++ b/core/modules/system/tests/src/Kernel/Plugin/migrate/source/ActionTest.php
@@ -20,7 +20,7 @@ class ActionTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     $tests[0][0]['actions'] = [
diff --git a/core/modules/system/tests/src/Kernel/Plugin/migrate/source/ExtensionTest.php b/core/modules/system/tests/src/Kernel/Plugin/migrate/source/ExtensionTest.php
index 64251b7107cc..741a25ff35ca 100644
--- a/core/modules/system/tests/src/Kernel/Plugin/migrate/source/ExtensionTest.php
+++ b/core/modules/system/tests/src/Kernel/Plugin/migrate/source/ExtensionTest.php
@@ -20,7 +20,7 @@ class ExtensionTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $test = [];
 
     $test[0]['source_data']['system'] = [
diff --git a/core/modules/system/tests/src/Kernel/Plugin/migrate/source/MenuTest.php b/core/modules/system/tests/src/Kernel/Plugin/migrate/source/MenuTest.php
index 0dc4082df722..806a77882edf 100644
--- a/core/modules/system/tests/src/Kernel/Plugin/migrate/source/MenuTest.php
+++ b/core/modules/system/tests/src/Kernel/Plugin/migrate/source/MenuTest.php
@@ -21,7 +21,7 @@ class MenuTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/system/tests/src/Kernel/Plugin/migrate/source/d7/MenuTranslationTest.php b/core/modules/system/tests/src/Kernel/Plugin/migrate/source/d7/MenuTranslationTest.php
index 7e829acab799..9b8fbe549192 100644
--- a/core/modules/system/tests/src/Kernel/Plugin/migrate/source/d7/MenuTranslationTest.php
+++ b/core/modules/system/tests/src/Kernel/Plugin/migrate/source/d7/MenuTranslationTest.php
@@ -22,7 +22,7 @@ class MenuTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
     $tests[0]['source_data']['menu_custom'] = [
       [
diff --git a/core/modules/system/tests/src/Kernel/Plugin/migrate/source/d7/ThemeSettingsTest.php b/core/modules/system/tests/src/Kernel/Plugin/migrate/source/d7/ThemeSettingsTest.php
index 8aa69be39d7b..ee1395315318 100644
--- a/core/modules/system/tests/src/Kernel/Plugin/migrate/source/d7/ThemeSettingsTest.php
+++ b/core/modules/system/tests/src/Kernel/Plugin/migrate/source/d7/ThemeSettingsTest.php
@@ -21,7 +21,7 @@ class ThemeSettingsTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/system/tests/src/Kernel/SecurityAdvisories/SecurityAdvisoriesFetcherTest.php b/core/modules/system/tests/src/Kernel/SecurityAdvisories/SecurityAdvisoriesFetcherTest.php
index 84172eb4b746..316889ef95e2 100644
--- a/core/modules/system/tests/src/Kernel/SecurityAdvisories/SecurityAdvisoriesFetcherTest.php
+++ b/core/modules/system/tests/src/Kernel/SecurityAdvisories/SecurityAdvisoriesFetcherTest.php
@@ -89,7 +89,7 @@ class SecurityAdvisoriesFetcherTest extends KernelTestBase implements LoggerInte
   /**
    * Data provider for testShowAdvisories().
    */
-  public function providerShowAdvisories(): array {
+  public static function providerShowAdvisories(): array {
     return [
       'contrib:exact:non-psa' => [
         'feed_item' => [
@@ -257,7 +257,7 @@ class SecurityAdvisoriesFetcherTest extends KernelTestBase implements LoggerInte
   /**
    * Data provider for testIgnoreAdvisories().
    */
-  public function providerIgnoreAdvisories(): array {
+  public static function providerIgnoreAdvisories(): array {
     return [
       'contrib:not-exact:non-psa' => [
         'feed_item' => [
diff --git a/core/modules/system/tests/src/Unit/Breadcrumbs/PathBasedBreadcrumbBuilderTest.php b/core/modules/system/tests/src/Unit/Breadcrumbs/PathBasedBreadcrumbBuilderTest.php
index a27944c418ba..d0fc897a1173 100644
--- a/core/modules/system/tests/src/Unit/Breadcrumbs/PathBasedBreadcrumbBuilderTest.php
+++ b/core/modules/system/tests/src/Unit/Breadcrumbs/PathBasedBreadcrumbBuilderTest.php
@@ -300,7 +300,7 @@ class PathBasedBreadcrumbBuilderTest extends UnitTestCase {
    *
    * @see \Drupal\Tests\system\Unit\Breadcrumbs\PathBasedBreadcrumbBuilderTest::testBuildWithException()
    */
-  public function providerTestBuildWithException() {
+  public static function providerTestBuildWithException() {
     return [
       ['Drupal\Core\ParamConverter\ParamNotConvertedException', ''],
       ['Symfony\Component\Routing\Exception\MethodNotAllowedException', []],
diff --git a/core/modules/system/tests/src/Unit/Event/SecurityFileUploadEventSubscriberTest.php b/core/modules/system/tests/src/Unit/Event/SecurityFileUploadEventSubscriberTest.php
index f2c8ba390968..b014da5019cb 100644
--- a/core/modules/system/tests/src/Unit/Event/SecurityFileUploadEventSubscriberTest.php
+++ b/core/modules/system/tests/src/Unit/Event/SecurityFileUploadEventSubscriberTest.php
@@ -72,7 +72,7 @@ class SecurityFileUploadEventSubscriberTest extends UnitTestCase {
    *   Arrays with original name, allowed extensions, expected name and
    *   (optional) expected name 'allow_insecure_uploads' is set to TRUE.
    */
-  public function provideFilenames() {
+  public static function provideFilenames() {
     return [
       'All extensions allowed filename not munged' => ['foo.txt', '', 'foo.txt'],
       'All extensions allowed with .php file' => ['foo.php', '', 'foo.php_.txt', 'foo.php'],
@@ -142,7 +142,7 @@ class SecurityFileUploadEventSubscriberTest extends UnitTestCase {
    * @return array
    *   Arrays with original name and allowed extensions.
    */
-  public function provideFilenamesNoMunge() {
+  public static function provideFilenamesNoMunge() {
     return [
       // The following filename would be rejected by 'FileExtension' constraint
       // and therefore remains unchanged.
diff --git a/core/modules/system/tests/src/Unit/Menu/MenuLinkTreeTest.php b/core/modules/system/tests/src/Unit/Menu/MenuLinkTreeTest.php
index d736e39aa0b4..e8e0871e472a 100644
--- a/core/modules/system/tests/src/Unit/Menu/MenuLinkTreeTest.php
+++ b/core/modules/system/tests/src/Unit/Menu/MenuLinkTreeTest.php
@@ -115,7 +115,7 @@ class MenuLinkTreeTest extends UnitTestCase {
    *
    * @see testBuildCacheability
    */
-  public function providerTestBuildCacheability() {
+  public static function providerTestBuildCacheability() {
     $base_expected_build_empty = [
       '#cache' => [
         'contexts' => [],
diff --git a/core/modules/system/tests/src/Unit/Menu/SystemLocalTasksTest.php b/core/modules/system/tests/src/Unit/Menu/SystemLocalTasksTest.php
index df7f74162d95..11564a2aca32 100644
--- a/core/modules/system/tests/src/Unit/Menu/SystemLocalTasksTest.php
+++ b/core/modules/system/tests/src/Unit/Menu/SystemLocalTasksTest.php
@@ -76,7 +76,7 @@ class SystemLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getSystemAdminRoutes() {
+  public static function getSystemAdminRoutes() {
     return [
       ['system.admin_content', [['system.admin_content']]],
       [
diff --git a/core/modules/system/tests/src/Unit/Routing/AdminRouteSubscriberTest.php b/core/modules/system/tests/src/Unit/Routing/AdminRouteSubscriberTest.php
index 117346713824..a2a0a03f98a5 100644
--- a/core/modules/system/tests/src/Unit/Routing/AdminRouteSubscriberTest.php
+++ b/core/modules/system/tests/src/Unit/Routing/AdminRouteSubscriberTest.php
@@ -30,7 +30,7 @@ class AdminRouteSubscriberTest extends UnitTestCase {
     $this->assertSame($is_admin, $route->getOption('_admin_route'));
   }
 
-  public function providerTestAlterRoutes() {
+  public static function providerTestAlterRoutes() {
     $data = [];
     $data['non-admin'] = [
       new Route('/foo'),
diff --git a/core/modules/system/tests/src/Unit/SecurityAdvisories/SecurityAdvisoryTest.php b/core/modules/system/tests/src/Unit/SecurityAdvisories/SecurityAdvisoryTest.php
index 13c63ded2096..a849b0923828 100644
--- a/core/modules/system/tests/src/Unit/SecurityAdvisories/SecurityAdvisoryTest.php
+++ b/core/modules/system/tests/src/Unit/SecurityAdvisories/SecurityAdvisoryTest.php
@@ -47,7 +47,7 @@ class SecurityAdvisoryTest extends UnitTestCase {
   /**
    * Data provider for testCreateFromArray().
    */
-  public function providerCreateFromArray(): array {
+  public static function providerCreateFromArray(): array {
     return [
       // For 'is_psa' the return value should converted to any array.
       [
@@ -110,7 +110,7 @@ class SecurityAdvisoryTest extends UnitTestCase {
   /**
    * Data provider for testCreateFromArrayMissingField().
    */
-  public function providerCreateFromArrayMissingField(): array {
+  public static function providerCreateFromArrayMissingField(): array {
     return [
       'title' => ['title'],
       'link' => ['link'],
@@ -148,7 +148,7 @@ class SecurityAdvisoryTest extends UnitTestCase {
   /**
    * Data provider for testCreateFromArrayInvalidField().
    */
-  public function providerCreateFromArrayInvalidField(): array {
+  public static function providerCreateFromArrayInvalidField(): array {
     return [
       'title' => ['title', 'This value should be of type string.'],
       'link' => ['link', 'This value should be of type string.'],
diff --git a/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php b/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php
index 3fb6283db197..b1608e620120 100644
--- a/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php
+++ b/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php
@@ -59,7 +59,7 @@ class MachineNameControllerTest extends UnitTestCase {
    *     - An array of request parameters.
    *     - The expected content of the JSONresponse.
    */
-  public function providerTestMachineNameController() {
+  public static function providerTestMachineNameController() {
     // cspell:ignore äwesome
     $valid_data = [
       [['text' => 'Bob', 'langcode' => 'en'], '"Bob"'],
diff --git a/core/modules/taxonomy/tests/src/Functional/Rest/TermResourceTestBase.php b/core/modules/taxonomy/tests/src/Functional/Rest/TermResourceTestBase.php
index c4f195078eb7..614ddc5513d7 100644
--- a/core/modules/taxonomy/tests/src/Functional/Rest/TermResourceTestBase.php
+++ b/core/modules/taxonomy/tests/src/Functional/Rest/TermResourceTestBase.php
@@ -356,7 +356,7 @@ abstract class TermResourceTestBase extends EntityResourceTestBase {
     $this->assertSame($expected, $actual);
   }
 
-  public function providerTestGetTermWithParent() {
+  public static function providerTestGetTermWithParent() {
     return [
       'root parent: [0] (= no parent)' => [
         [0],
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermLocalizedTranslationTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermLocalizedTranslationTest.php
index b169ecd9c736..3da74ac5001e 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermLocalizedTranslationTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermLocalizedTranslationTest.php
@@ -22,7 +22,7 @@ class TermLocalizedTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermNodeTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermNodeTest.php
index 8bda23593be0..34e6f787a7d9 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermNodeTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermNodeTest.php
@@ -22,7 +22,7 @@ class TermNodeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermSourceWithVocabularyFilterTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermSourceWithVocabularyFilterTest.php
index bb60f9c4b9f6..68a6d19767c1 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermSourceWithVocabularyFilterTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermSourceWithVocabularyFilterTest.php
@@ -18,7 +18,7 @@ class TermSourceWithVocabularyFilterTest extends TermTest {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     // Get the source data from parent.
     $tests = parent::providerSource();
 
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTest.php
index c0b50cb0f670..6185fa702dd5 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTest.php
@@ -20,7 +20,7 @@ class TermTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTranslationTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTranslationTest.php
index cafbc813b95f..6217a69a2282 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTranslationTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTranslationTest.php
@@ -20,7 +20,7 @@ class TermTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyPerTypeTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyPerTypeTest.php
index bce46846d437..21e366a8e43c 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyPerTypeTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyPerTypeTest.php
@@ -21,7 +21,7 @@ class VocabularyPerTypeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTest.php
index 4b81b6c3fb87..5ec4cad91c69 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTest.php
@@ -21,7 +21,7 @@ class VocabularyTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTranslationTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTranslationTest.php
index cabe970f247f..5049380d0a03 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTranslationTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTranslationTest.php
@@ -22,7 +22,7 @@ class VocabularyTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermEntityTranslationTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermEntityTranslationTest.php
index 9cb061d19895..89c175d617dd 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermEntityTranslationTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermEntityTranslationTest.php
@@ -20,7 +20,7 @@ class TermEntityTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermLocalizedTranslationTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermLocalizedTranslationTest.php
index 1447eda0b510..5a19f74d307a 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermLocalizedTranslationTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermLocalizedTranslationTest.php
@@ -20,7 +20,7 @@ class TermLocalizedTranslationTest extends TermTest {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = parent::providerSource();
 
     for ($i = 1; $i < 4; $i++) {
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermSourceWithVocabularyFilterTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermSourceWithVocabularyFilterTest.php
index 274d586d7419..13b078f2be88 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermSourceWithVocabularyFilterTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermSourceWithVocabularyFilterTest.php
@@ -18,7 +18,7 @@ class TermSourceWithVocabularyFilterTest extends TermTest {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     // Get the source data from parent.
     $tests = parent::providerSource();
 
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermTest.php
index 8ee71dfcc218..072911b70c16 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermTest.php
@@ -20,7 +20,7 @@ class TermTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermTranslationTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermTranslationTest.php
index 9e37649da850..36baca6101f9 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermTranslationTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermTranslationTest.php
@@ -20,7 +20,7 @@ class TermTranslationTest extends TermTest {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // Ignore i18_modes 0 and 1, get i18n_mode 4.
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/VocabularyTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/VocabularyTest.php
index fb78c547d738..9b38b782ee88 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/VocabularyTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/VocabularyTest.php
@@ -20,7 +20,7 @@ class VocabularyTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/VocabularyTranslationTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/VocabularyTranslationTest.php
index f013a59c034c..9604cad26e85 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/VocabularyTranslationTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/VocabularyTranslationTest.php
@@ -22,7 +22,7 @@ class VocabularyTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/taxonomy/tests/src/Unit/Menu/TaxonomyLocalTasksTest.php b/core/modules/taxonomy/tests/src/Unit/Menu/TaxonomyLocalTasksTest.php
index 7635b266d78f..dc6799c960aa 100644
--- a/core/modules/taxonomy/tests/src/Unit/Menu/TaxonomyLocalTasksTest.php
+++ b/core/modules/taxonomy/tests/src/Unit/Menu/TaxonomyLocalTasksTest.php
@@ -39,7 +39,7 @@ class TaxonomyLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getTaxonomyPageRoutes() {
+  public static function getTaxonomyPageRoutes() {
     return [
       ['entity.taxonomy_term.canonical'],
       ['entity.taxonomy_term.edit_form'],
diff --git a/core/modules/telephone/tests/src/Functional/TelephoneFieldTest.php b/core/modules/telephone/tests/src/Functional/TelephoneFieldTest.php
index 6ef20bc9f062..3bc8400195e0 100644
--- a/core/modules/telephone/tests/src/Functional/TelephoneFieldTest.php
+++ b/core/modules/telephone/tests/src/Functional/TelephoneFieldTest.php
@@ -117,7 +117,7 @@ class TelephoneFieldTest extends BrowserTestBase {
   /**
    * Provides the phone numbers to check and expected results.
    */
-  public function providerPhoneNumbers() {
+  public static function providerPhoneNumbers() {
     return [
       'standard phone number' => ['123456789', '123456789'],
       'whitespace is removed' => ['1234 56789', '123456789'],
diff --git a/core/modules/text/tests/src/Kernel/TextItemBaseTest.php b/core/modules/text/tests/src/Kernel/TextItemBaseTest.php
index d3c17673e0ca..676e9c5d3959 100644
--- a/core/modules/text/tests/src/Kernel/TextItemBaseTest.php
+++ b/core/modules/text/tests/src/Kernel/TextItemBaseTest.php
@@ -44,7 +44,7 @@ class TextItemBaseTest extends KernelTestBase {
   /**
    * Data provider for testTextFieldSampleValue.
    */
-  public function providerTextFieldSampleValue() {
+  public static function providerTextFieldSampleValue() {
     return [
       [
         1,
diff --git a/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php b/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php
index 2787a99d132e..644e4d4457f1 100644
--- a/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php
+++ b/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php
@@ -126,7 +126,7 @@ class TextFieldTest extends UnitTestCase {
   /**
    * Data provider for testGetFieldType().
    */
-  public function getFieldTypeProvider() {
+  public static function getFieldTypeProvider() {
     return [
       ['string_long', 'text_textfield', ['text_processing' => FALSE]],
       ['string', 'text_textfield', [
diff --git a/core/modules/text/tests/src/Unit/Plugin/migrate/field/d7/TextFieldTest.php b/core/modules/text/tests/src/Unit/Plugin/migrate/field/d7/TextFieldTest.php
index 0bae0bec6445..78cb15b86ffe 100644
--- a/core/modules/text/tests/src/Unit/Plugin/migrate/field/d7/TextFieldTest.php
+++ b/core/modules/text/tests/src/Unit/Plugin/migrate/field/d7/TextFieldTest.php
@@ -31,7 +31,7 @@ class TextFieldTest extends UnitTestCase {
   /**
    * Data provider for testGetFieldFormatterType().
    */
-  public function getFieldFormatterTypeProvider() {
+  public static function getFieldFormatterTypeProvider() {
     return [
       ['text', 'text_plain', 'string'],
       ['text_long', 'text_default', 'basic_string'],
diff --git a/core/modules/toolbar/tests/src/Unit/PageCache/AllowToolbarPathTest.php b/core/modules/toolbar/tests/src/Unit/PageCache/AllowToolbarPathTest.php
index a11a1bd66ada..0b91bc2be860 100644
--- a/core/modules/toolbar/tests/src/Unit/PageCache/AllowToolbarPathTest.php
+++ b/core/modules/toolbar/tests/src/Unit/PageCache/AllowToolbarPathTest.php
@@ -49,7 +49,7 @@ class AllowToolbarPathTest extends UnitTestCase {
    * @return array
    *   Data and expected results.
    */
-  public function providerTestAllowToolbarPath() {
+  public static function providerTestAllowToolbarPath() {
     return [
       [NULL, '/'],
       [NULL, '/other-path?q=/toolbar/subtrees/'],
diff --git a/core/modules/tour/tests/src/Unit/Entity/TourTest.php b/core/modules/tour/tests/src/Unit/Entity/TourTest.php
index ff398e28670b..7644ddabf097 100644
--- a/core/modules/tour/tests/src/Unit/Entity/TourTest.php
+++ b/core/modules/tour/tests/src/Unit/Entity/TourTest.php
@@ -46,7 +46,7 @@ class TourTest extends UnitTestCase {
   /**
    * Provides sample routes for testing.
    */
-  public function routeProvider() {
+  public static function routeProvider() {
     return [
       // Simple match.
       [
diff --git a/core/modules/tracker/tests/src/Kernel/Plugin/migrate/source/d7/TrackerNodeTest.php b/core/modules/tracker/tests/src/Kernel/Plugin/migrate/source/d7/TrackerNodeTest.php
index 3762d9d125d4..cde23b60e7eb 100644
--- a/core/modules/tracker/tests/src/Kernel/Plugin/migrate/source/d7/TrackerNodeTest.php
+++ b/core/modules/tracker/tests/src/Kernel/Plugin/migrate/source/d7/TrackerNodeTest.php
@@ -22,7 +22,7 @@ class TrackerNodeTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/tracker/tests/src/Kernel/Plugin/migrate/source/d7/TrackerUserTest.php b/core/modules/tracker/tests/src/Kernel/Plugin/migrate/source/d7/TrackerUserTest.php
index acef8b98cf4e..02f5e81c76b9 100644
--- a/core/modules/tracker/tests/src/Kernel/Plugin/migrate/source/d7/TrackerUserTest.php
+++ b/core/modules/tracker/tests/src/Kernel/Plugin/migrate/source/d7/TrackerUserTest.php
@@ -22,7 +22,7 @@ class TrackerUserTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/update/tests/src/Functional/FileTransferAuthorizeFormTest.php b/core/modules/update/tests/src/Functional/FileTransferAuthorizeFormTest.php
index 3da6d527fb41..88ce412ea8d2 100644
--- a/core/modules/update/tests/src/Functional/FileTransferAuthorizeFormTest.php
+++ b/core/modules/update/tests/src/Functional/FileTransferAuthorizeFormTest.php
@@ -78,7 +78,7 @@ class FileTransferAuthorizeFormTest extends UpdateUploaderTestBase {
    *
    * Each of these release URLs has been cached in the setUp() method.
    */
-  public function archiveFileUrlProvider() {
+  public static function archiveFileUrlProvider() {
     return [
       'tar.gz' => [
         'url' => 'https://ftp.drupal.org/files/projects/update_test_new_module.tar.gz',
diff --git a/core/modules/update/tests/src/Functional/UpdateContribTest.php b/core/modules/update/tests/src/Functional/UpdateContribTest.php
index aa753e746845..49eac1ca6ae4 100644
--- a/core/modules/update/tests/src/Functional/UpdateContribTest.php
+++ b/core/modules/update/tests/src/Functional/UpdateContribTest.php
@@ -643,7 +643,7 @@ class UpdateContribTest extends UpdateTestBase {
    *   - 8.x-1.1
    *   - 8.x-1.0
    */
-  public function securityUpdateAvailabilityProvider() {
+  public static function securityUpdateAvailabilityProvider() {
     return [
       // Security releases available for module major release 1.
       // No releases for next major.
diff --git a/core/modules/update/tests/src/Functional/UpdateManagerUpdateTest.php b/core/modules/update/tests/src/Functional/UpdateManagerUpdateTest.php
index f549e284915b..fdaf78f85f7a 100644
--- a/core/modules/update/tests/src/Functional/UpdateManagerUpdateTest.php
+++ b/core/modules/update/tests/src/Functional/UpdateManagerUpdateTest.php
@@ -93,7 +93,7 @@ class UpdateManagerUpdateTest extends UpdateTestBase {
    * @return array[]
    *   Test data.
    */
-  public function incompatibleUpdatesTableProvider() {
+  public static function incompatibleUpdatesTableProvider() {
     return [
       'only one compatible' => [
         'core_fixture' => '1.1-core_compatibility',
diff --git a/core/modules/update/tests/src/Functional/UpdateSemverCoreSecurityCoverageTest.php b/core/modules/update/tests/src/Functional/UpdateSemverCoreSecurityCoverageTest.php
index 4b35c749904f..70530d56feff 100644
--- a/core/modules/update/tests/src/Functional/UpdateSemverCoreSecurityCoverageTest.php
+++ b/core/modules/update/tests/src/Functional/UpdateSemverCoreSecurityCoverageTest.php
@@ -74,7 +74,7 @@ class UpdateSemverCoreSecurityCoverageTest extends UpdateSemverCoreTestBase {
    *   - 10.4.0
    *   - 10.5.0
    */
-  public function securityCoverageMessageProvider() {
+  public static function securityCoverageMessageProvider() {
     $release_coverage_message = 'Visit the release cycle overview for more information on supported releases.';
     $coverage_ended_message = 'Coverage has ended';
     $update_asap_message = 'Update to a supported minor as soon as possible to continue receiving security updates.';
diff --git a/core/modules/update/tests/src/Kernel/UpdateReportTest.php b/core/modules/update/tests/src/Kernel/UpdateReportTest.php
index 2a8ec0361ffa..3a6482829188 100644
--- a/core/modules/update/tests/src/Kernel/UpdateReportTest.php
+++ b/core/modules/update/tests/src/Kernel/UpdateReportTest.php
@@ -45,7 +45,7 @@ class UpdateReportTest extends KernelTestBase {
    * @return array
    *   Array of $variables for template_preprocess_update_report().
    */
-  public function providerTemplatePreprocessUpdateReport() {
+  public static function providerTemplatePreprocessUpdateReport() {
     return [
       '$variables with data not set' => [
         [],
diff --git a/core/modules/update/tests/src/Unit/Menu/UpdateLocalTasksTest.php b/core/modules/update/tests/src/Unit/Menu/UpdateLocalTasksTest.php
index a62714e70d03..41a6da04403c 100644
--- a/core/modules/update/tests/src/Unit/Menu/UpdateLocalTasksTest.php
+++ b/core/modules/update/tests/src/Unit/Menu/UpdateLocalTasksTest.php
@@ -35,7 +35,7 @@ class UpdateLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of report routes to test.
    */
-  public function getUpdateReportRoutes() {
+  public static function getUpdateReportRoutes() {
     return [
       ['update.status'],
       ['update.settings'],
@@ -57,7 +57,7 @@ class UpdateLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of module routes to test.
    */
-  public function getUpdateModuleRoutes() {
+  public static function getUpdateModuleRoutes() {
     return [
       ['update.module_update'],
     ];
@@ -77,7 +77,7 @@ class UpdateLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of theme routes to test.
    */
-  public function getUpdateThemeRoutes() {
+  public static function getUpdateThemeRoutes() {
     return [
       ['update.theme_update'],
     ];
diff --git a/core/modules/update/tests/src/Unit/ProjectCoreCompatibilityTest.php b/core/modules/update/tests/src/Unit/ProjectCoreCompatibilityTest.php
index 1b68ef27d41b..661d2742e23d 100644
--- a/core/modules/update/tests/src/Unit/ProjectCoreCompatibilityTest.php
+++ b/core/modules/update/tests/src/Unit/ProjectCoreCompatibilityTest.php
@@ -29,7 +29,7 @@ class ProjectCoreCompatibilityTest extends UnitTestCase {
   /**
    * Data provider for testSetProjectCoreCompatibilityRanges().
    */
-  public function providerSetProjectCoreCompatibilityRanges() {
+  public static function providerSetProjectCoreCompatibilityRanges() {
     $test_cases['no 9 releases'] = [
       'project_data' => [
         'recommended' => '1.0.1',
diff --git a/core/modules/update/tests/src/Unit/ProjectReleaseTest.php b/core/modules/update/tests/src/Unit/ProjectReleaseTest.php
index ebd538338b75..cfc595a6fc56 100644
--- a/core/modules/update/tests/src/Unit/ProjectReleaseTest.php
+++ b/core/modules/update/tests/src/Unit/ProjectReleaseTest.php
@@ -63,7 +63,7 @@ class ProjectReleaseTest extends UnitTestCase {
    * @return mixed
    *   Test cases for testCreateFromArray().
    */
-  public function providerCreateFromArray(): array {
+  public static function providerCreateFromArray(): array {
     return [
       'default valid' => [
         'data' => [],
@@ -151,7 +151,7 @@ class ProjectReleaseTest extends UnitTestCase {
   /**
    * Data provider for testCreateFromArrayMissingField().
    */
-  public function providerCreateFromArrayMissingField(): array {
+  public static function providerCreateFromArrayMissingField(): array {
     return [
       'status' => ['status'],
       'version' => ['version'],
@@ -188,7 +188,7 @@ class ProjectReleaseTest extends UnitTestCase {
   /**
    * Data provider for testCreateFromArrayInvalidField().
    */
-  public function providerCreateFromArrayInvalidField(): array {
+  public static function providerCreateFromArrayInvalidField(): array {
     return [
       'status other' => [
         'invalid_field' => 'status',
diff --git a/core/modules/update/tests/src/Unit/UpdateFetcherTest.php b/core/modules/update/tests/src/Unit/UpdateFetcherTest.php
index 26544d929c73..725da72fa053 100644
--- a/core/modules/update/tests/src/Unit/UpdateFetcherTest.php
+++ b/core/modules/update/tests/src/Unit/UpdateFetcherTest.php
@@ -117,7 +117,7 @@ class UpdateFetcherTest extends UnitTestCase {
    *   - 'site_key' - An arbitrary site key.
    *   - 'expected' - The expected URL from UpdateFetcher::buildFetchUrl().
    */
-  public function providerTestUpdateBuildFetchUrl() {
+  public static function providerTestUpdateBuildFetchUrl() {
     $data = [];
 
     // First test that we didn't break the trivial case.
diff --git a/core/modules/update/tests/src/Unit/UpdateMailTest.php b/core/modules/update/tests/src/Unit/UpdateMailTest.php
index cba4fbb1ffaf..b79df48c9500 100644
--- a/core/modules/update/tests/src/Unit/UpdateMailTest.php
+++ b/core/modules/update/tests/src/Unit/UpdateMailTest.php
@@ -181,7 +181,7 @@ class UpdateMailTest extends UnitTestCase {
    *   - TRUE if the user is authorized.
    *   - An array of message body strings.
    */
-  public function providerTestUpdateEmail(): array {
+  public static function providerTestUpdateEmail(): array {
     return [
       'all' => [
         'all',
diff --git a/core/modules/user/tests/src/Functional/UserPasswordResetTest.php b/core/modules/user/tests/src/Functional/UserPasswordResetTest.php
index 442a0cb8c6da..edc7308dfe94 100644
--- a/core/modules/user/tests/src/Functional/UserPasswordResetTest.php
+++ b/core/modules/user/tests/src/Functional/UserPasswordResetTest.php
@@ -279,7 +279,7 @@ class UserPasswordResetTest extends BrowserTestBase {
    *
    * @return array
    */
-  public function languagePrefixTestProvider() {
+  public static function languagePrefixTestProvider() {
     return [
       'Test language prefix set as \'\', visiting default with preferred language as en' => [
         'setPreferredLangcode' => 'en',
diff --git a/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserRoleTest.php b/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserRoleTest.php
index b71277ba8227..87df992528dd 100644
--- a/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserRoleTest.php
+++ b/core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserRoleTest.php
@@ -100,7 +100,7 @@ class MigrateUserRoleTest extends MigrateDrupal6TestBase {
   /**
    * Data provider for user role migration tests.
    */
-  public function providerTestUserRole() {
+  public static function providerTestUserRole() {
     return [
       'filter only' => [
         'modules' => [],
diff --git a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/ProfileFieldTest.php b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/ProfileFieldTest.php
index 9dc0c72ea300..977b2ebcacfb 100644
--- a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/ProfileFieldTest.php
+++ b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/ProfileFieldTest.php
@@ -20,7 +20,7 @@ class ProfileFieldTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/UserPictureInstanceTest.php b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/UserPictureInstanceTest.php
index a87ede1f7ad3..1c175c1763c0 100644
--- a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/UserPictureInstanceTest.php
+++ b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/UserPictureInstanceTest.php
@@ -20,7 +20,7 @@ class UserPictureInstanceTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldOptionTranslationTest.php b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldOptionTranslationTest.php
index ea73ea88966b..da3780faed05 100644
--- a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldOptionTranslationTest.php
+++ b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldOptionTranslationTest.php
@@ -22,7 +22,7 @@ class ProfileFieldOptionTranslationTest extends ProfileFieldTest {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
 
     $test = parent::providerSource();
     // The source data.
diff --git a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldValuesTest.php b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldValuesTest.php
index 872a186efbb0..58e0716bbb13 100644
--- a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldValuesTest.php
+++ b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/ProfileFieldValuesTest.php
@@ -20,7 +20,7 @@ class ProfileFieldValuesTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/RoleTest.php b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/RoleTest.php
index d37659b4f8b6..0fd5c51fa490 100644
--- a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/RoleTest.php
+++ b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/RoleTest.php
@@ -20,7 +20,7 @@ class RoleTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [
       [
         'source_data' => [],
diff --git a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserPictureFileTest.php b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserPictureFileTest.php
index 4875f84885cc..47902d5bbfe3 100644
--- a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserPictureFileTest.php
+++ b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserPictureFileTest.php
@@ -20,7 +20,7 @@ class UserPictureFileTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserPictureTest.php b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserPictureTest.php
index 2eb61d84c1e1..9ba7539f849b 100644
--- a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserPictureTest.php
+++ b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserPictureTest.php
@@ -20,7 +20,7 @@ class UserPictureTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserTest.php b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserTest.php
index 19f85be63a8c..e15303ffff47 100644
--- a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserTest.php
+++ b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d6/UserTest.php
@@ -20,7 +20,7 @@ class UserTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/RoleTest.php b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/RoleTest.php
index 885894c78090..947ffcac4710 100644
--- a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/RoleTest.php
+++ b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/RoleTest.php
@@ -20,7 +20,7 @@ class RoleTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $expected = [
       [
         'rid' => 1,
diff --git a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/UserEntityTranslationTest.php b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/UserEntityTranslationTest.php
index d8d5d7224283..00d1c5d4c676 100644
--- a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/UserEntityTranslationTest.php
+++ b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/UserEntityTranslationTest.php
@@ -21,7 +21,7 @@ class UserEntityTranslationTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/UserTest.php b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/UserTest.php
index 5f8a90a65527..968a9e176370 100644
--- a/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/UserTest.php
+++ b/core/modules/user/tests/src/Kernel/Plugin/migrate/source/d7/UserTest.php
@@ -20,7 +20,7 @@ class UserTest extends MigrateSqlSourceTestBase {
   /**
    * {@inheritdoc}
    */
-  public function providerSource() {
+  public static function providerSource() {
     $tests = [];
 
     // The source data.
diff --git a/core/modules/user/tests/src/Kernel/UserMailDefaultsTest.php b/core/modules/user/tests/src/Kernel/UserMailDefaultsTest.php
index 37e788e19e39..e3426ea5dc74 100644
--- a/core/modules/user/tests/src/Kernel/UserMailDefaultsTest.php
+++ b/core/modules/user/tests/src/Kernel/UserMailDefaultsTest.php
@@ -40,7 +40,7 @@ class UserMailDefaultsTest extends KernelTestBase {
    * @return array
    *   Array of arrays containing the set of user mail configuration keys.
    */
-  public function userMailsProvider() {
+  public static function userMailsProvider() {
     return [
       ['cancel_confirm'],
       ['password_reset'],
diff --git a/core/modules/user/tests/src/Kernel/UserMailNotifyTest.php b/core/modules/user/tests/src/Kernel/UserMailNotifyTest.php
index 28bec8b5b123..a5b16cd1bb19 100644
--- a/core/modules/user/tests/src/Kernel/UserMailNotifyTest.php
+++ b/core/modules/user/tests/src/Kernel/UserMailNotifyTest.php
@@ -33,7 +33,7 @@ class UserMailNotifyTest extends EntityKernelTestBase {
    *
    * @return array
    */
-  public function userMailsProvider() {
+  public static function userMailsProvider() {
     return [
       'cancel confirm notification' => [
         'cancel_confirm',
diff --git a/core/modules/user/tests/src/Unit/Form/EntityPermissionsFormTest.php b/core/modules/user/tests/src/Unit/Form/EntityPermissionsFormTest.php
index d0120508d901..d8eb84c6aeaa 100644
--- a/core/modules/user/tests/src/Unit/Form/EntityPermissionsFormTest.php
+++ b/core/modules/user/tests/src/Unit/Form/EntityPermissionsFormTest.php
@@ -100,7 +100,7 @@ class EntityPermissionsFormTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestPermissionsByProvider() {
+  public static function providerTestPermissionsByProvider() {
     return [
       'direct dependency' => ['node.type.article', TRUE],
       'indirect dependency' => ['core.entity_view_display.node.article.full', TRUE],
diff --git a/core/modules/user/tests/src/Unit/Menu/UserLocalTasksTest.php b/core/modules/user/tests/src/Unit/Menu/UserLocalTasksTest.php
index 5a791d66cd58..f812efce9206 100644
--- a/core/modules/user/tests/src/Unit/Menu/UserLocalTasksTest.php
+++ b/core/modules/user/tests/src/Unit/Menu/UserLocalTasksTest.php
@@ -42,7 +42,7 @@ class UserLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getUserAdminRoutes() {
+  public static function getUserAdminRoutes() {
     return [
       ['entity.user.collection', [['entity.user.collection', 'user.admin_permissions', 'entity.user_role.collection', 'user.role.settings']]],
       ['user.admin_permissions', [['entity.user.collection', 'user.admin_permissions', 'entity.user_role.collection', 'user.role.settings']]],
@@ -66,7 +66,7 @@ class UserLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getUserLoginRoutes() {
+  public static function getUserLoginRoutes() {
     return [
       ['user.login'],
       ['user.register'],
@@ -92,7 +92,7 @@ class UserLocalTasksTest extends LocalTaskIntegrationTestBase {
   /**
    * Provides a list of routes to test.
    */
-  public function getUserPageRoutes() {
+  public static function getUserPageRoutes() {
     return [
       ['entity.user.canonical'],
       ['entity.user.edit_form'],
diff --git a/core/modules/user/tests/src/Unit/PermissionAccessCheckTest.php b/core/modules/user/tests/src/Unit/PermissionAccessCheckTest.php
index 4ed2bedac1ed..3c98ff42bd60 100644
--- a/core/modules/user/tests/src/Unit/PermissionAccessCheckTest.php
+++ b/core/modules/user/tests/src/Unit/PermissionAccessCheckTest.php
@@ -53,7 +53,7 @@ class PermissionAccessCheckTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestAccess() {
+  public static function providerTestAccess() {
     return [
       [[], FALSE],
       [['_permission' => 'allowed'], TRUE, ['user.permissions']],
diff --git a/core/modules/user/tests/src/Unit/Theme/AdminNegotiatorTest.php b/core/modules/user/tests/src/Unit/Theme/AdminNegotiatorTest.php
index 0ad90dbc4a0e..2740acf784e3 100644
--- a/core/modules/user/tests/src/Unit/Theme/AdminNegotiatorTest.php
+++ b/core/modules/user/tests/src/Unit/Theme/AdminNegotiatorTest.php
@@ -35,7 +35,7 @@ class AdminNegotiatorTest extends UnitTestCase {
   /**
    * Provides a list of theme names to test.
    */
-  public function getThemes() {
+  public static function getThemes() {
     return [
       ['claro', 'claro'],
       [NULL, NULL],
diff --git a/core/modules/user/tests/src/Unit/UserAccessControlHandlerTest.php b/core/modules/user/tests/src/Unit/UserAccessControlHandlerTest.php
index 8abe7759a116..624da1b23484 100644
--- a/core/modules/user/tests/src/Unit/UserAccessControlHandlerTest.php
+++ b/core/modules/user/tests/src/Unit/UserAccessControlHandlerTest.php
@@ -167,7 +167,7 @@ class UserAccessControlHandlerTest extends UnitTestCase {
   /**
    * Provides test data for testUserNameAccess().
    */
-  public function userNameProvider() {
+  public static function userNameProvider() {
     $name_access = [
       // The viewer user is allowed to see user names on all accounts.
       [
@@ -218,7 +218,7 @@ class UserAccessControlHandlerTest extends UnitTestCase {
   /**
    * Provides test data for testHiddenUserSettings().
    */
-  public function hiddenUserSettingsProvider() {
+  public static function hiddenUserSettingsProvider() {
     $access_info = [];
 
     $fields = [
@@ -285,7 +285,7 @@ class UserAccessControlHandlerTest extends UnitTestCase {
   /**
    * Provides test data for testAdminFieldAccess().
    */
-  public function adminFieldAccessProvider() {
+  public static function adminFieldAccessProvider() {
     $access_info = [];
 
     $fields = [
@@ -335,7 +335,7 @@ class UserAccessControlHandlerTest extends UnitTestCase {
   /**
    * Provides test data for passwordAccessProvider().
    */
-  public function passwordAccessProvider() {
+  public static function passwordAccessProvider() {
     $pass_access = [
       [
         'viewer' => 'viewer',
@@ -380,7 +380,7 @@ class UserAccessControlHandlerTest extends UnitTestCase {
   /**
    * Provides test data for testCreatedAccess().
    */
-  public function createdAccessProvider() {
+  public static function createdAccessProvider() {
     $created_access = [
       [
         'viewer' => 'viewer',
@@ -419,7 +419,7 @@ class UserAccessControlHandlerTest extends UnitTestCase {
   /**
    * Provides test data for testNonExistingFieldAccess().
    */
-  public function NonExistingFieldAccessProvider() {
+  public static function NonExistingFieldAccessProvider() {
     $created_access = [
       [
         'viewer' => 'viewer',
diff --git a/core/modules/user/tests/src/Unit/UserAuthTest.php b/core/modules/user/tests/src/Unit/UserAuthTest.php
index e14e40225a37..364376aa1257 100644
--- a/core/modules/user/tests/src/Unit/UserAuthTest.php
+++ b/core/modules/user/tests/src/Unit/UserAuthTest.php
@@ -108,7 +108,7 @@ class UserAuthTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestAuthenticateWithMissingCredentials() {
+  public static function providerTestAuthenticateWithMissingCredentials() {
     return [
       [NULL, NULL],
       [NULL, ''],
diff --git a/core/modules/user/tests/src/Unit/UserNameItemTest.php b/core/modules/user/tests/src/Unit/UserNameItemTest.php
index 0a0a3ce594b3..50c09eee6837 100644
--- a/core/modules/user/tests/src/Unit/UserNameItemTest.php
+++ b/core/modules/user/tests/src/Unit/UserNameItemTest.php
@@ -42,7 +42,7 @@ class UserNameItemTest extends UnitTestCase {
    * @return array
    *   Test cases.
    */
-  public function providerMaxLength(): array {
+  public static function providerMaxLength(): array {
     return [
       '32' => [32],
       '255' => [255],
diff --git a/core/modules/views/tests/src/Functional/Plugin/ExposedFormTest.php b/core/modules/views/tests/src/Functional/Plugin/ExposedFormTest.php
index dc5f4fa9ee57..6c9d518dabfd 100644
--- a/core/modules/views/tests/src/Functional/Plugin/ExposedFormTest.php
+++ b/core/modules/views/tests/src/Functional/Plugin/ExposedFormTest.php
@@ -322,7 +322,7 @@ class ExposedFormTest extends ViewTestBase {
    * @return array
    *   Array of display names to test.
    */
-  public function providerTestExposedBlock() {
+  public static function providerTestExposedBlock() {
     return [
       'page_display' => ['page_1'],
       'block_display' => ['block_1'],
diff --git a/core/modules/views/tests/src/Kernel/Handler/FieldNumericTest.php b/core/modules/views/tests/src/Kernel/Handler/FieldNumericTest.php
index 747c8d525c5d..766d01632cbd 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FieldNumericTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FieldNumericTest.php
@@ -47,7 +47,7 @@ class FieldNumericTest extends ViewsKernelTestBase {
    *   The data set containing field settings, values to set and expected
    *   values.
    */
-  public function providerTestFieldNumeric() {
+  public static function providerTestFieldNumeric() {
     return [
       'no-formatting' => [
         [],
diff --git a/core/modules/views/tests/src/Kernel/Handler/FilterNumericTest.php b/core/modules/views/tests/src/Kernel/Handler/FilterNumericTest.php
index ab7cef8c8390..40e5b908a097 100644
--- a/core/modules/views/tests/src/Kernel/Handler/FilterNumericTest.php
+++ b/core/modules/views/tests/src/Kernel/Handler/FilterNumericTest.php
@@ -130,7 +130,7 @@ class FilterNumericTest extends ViewsKernelTestBase {
    *   An array of arrays, each containing the parameters for
    *   self::testFilterNumericBetween().
    */
-  public function providerTestFilterNumericBetween() {
+  public static function providerTestFilterNumericBetween() {
     $all_result = [
       ['name' => 'John', 'age' => 25],
       ['name' => 'George', 'age' => 27],
diff --git a/core/modules/views/tests/src/Kernel/Plugin/StyleGridResponsiveTest.php b/core/modules/views/tests/src/Kernel/Plugin/StyleGridResponsiveTest.php
index 52bd97c0308e..05a73abfa718 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/StyleGridResponsiveTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/StyleGridResponsiveTest.php
@@ -68,7 +68,7 @@ class StyleGridResponsiveTest extends PluginKernelTestBase {
    * @return array
    *   Array containing options for the style plugin and expected values.
    */
-  public function providerTestResponsiveGrid() {
+  public static function providerTestResponsiveGrid() {
     return [
       'horizontal' => [
         'settings' => [
diff --git a/core/modules/views/tests/src/Unit/Plugin/area/EntityTest.php b/core/modules/views/tests/src/Unit/Plugin/area/EntityTest.php
index 2379c9567f6a..c7df3c222b3f 100644
--- a/core/modules/views/tests/src/Unit/Plugin/area/EntityTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/area/EntityTest.php
@@ -143,7 +143,7 @@ class EntityTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestTokens() {
+  public static function providerTestTokens() {
     return [
       ['{{ raw_arguments.test1 }}', 5],
       ['{{ arguments.test2 }}', 6],
diff --git a/core/modules/views/tests/src/Unit/Plugin/area/ResultTest.php b/core/modules/views/tests/src/Unit/Plugin/area/ResultTest.php
index c8e65c97b1bb..c59a2e5a8afa 100644
--- a/core/modules/views/tests/src/Unit/Plugin/area/ResultTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/area/ResultTest.php
@@ -92,7 +92,7 @@ class ResultTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestResultArea() {
+  public static function providerTestResultArea() {
     return [
       ['@label', 'ResultTest'],
       ['@start', '1'],
diff --git a/core/modules/views/tests/src/Unit/Plugin/argument_default/QueryParameterTest.php b/core/modules/views/tests/src/Unit/Plugin/argument_default/QueryParameterTest.php
index 28f1adc6d2c4..796b4c7b03fe 100644
--- a/core/modules/views/tests/src/Unit/Plugin/argument_default/QueryParameterTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/argument_default/QueryParameterTest.php
@@ -44,7 +44,7 @@ class QueryParameterTest extends UnitTestCase {
    *   - second entry: the request object to test with.
    *   - third entry: the expected default argument value.
    */
-  public function providerGetArgument() {
+  public static function providerGetArgument() {
     $data = [];
 
     $data[] = [
diff --git a/core/modules/views/tests/src/Unit/Plugin/field/CounterTest.php b/core/modules/views/tests/src/Unit/Plugin/field/CounterTest.php
index 9e9c39f9376a..8efeafb3c078 100644
--- a/core/modules/views/tests/src/Unit/Plugin/field/CounterTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/field/CounterTest.php
@@ -100,7 +100,7 @@ class CounterTest extends UnitTestCase {
    * @return array
    *   Returns an array of row index to test.
    */
-  public function providerRowIndexes() {
+  public static function providerRowIndexes() {
     return [
       [0],
       [1],
diff --git a/core/modules/views/tests/src/Unit/Plugin/field/FieldPluginBaseTest.php b/core/modules/views/tests/src/Unit/Plugin/field/FieldPluginBaseTest.php
index a7899a91431e..a5b7b8b5b41e 100644
--- a/core/modules/views/tests/src/Unit/Plugin/field/FieldPluginBaseTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/field/FieldPluginBaseTest.php
@@ -271,7 +271,7 @@ class FieldPluginBaseTest extends UnitTestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestRenderTrimmedWithMoreLinkAndPath() {
+  public static function providerTestRenderTrimmedWithMoreLinkAndPath() {
     $data = [];
     // Simple path with default options.
     $data[] = ['test-path', '/test-path'];
@@ -562,7 +562,7 @@ class FieldPluginBaseTest extends UnitTestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestRenderAsLinkWithPathAndTokens() {
+  public static function providerTestRenderAsLinkWithPathAndTokens() {
     $tokens = ['{{ foo }}' => 123];
     $link_html = '<a href="/test-path/123">value</a>';
 
@@ -626,7 +626,7 @@ class FieldPluginBaseTest extends UnitTestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestRenderAsExternalLinkWithPathAndTokens() {
+  public static function providerTestRenderAsExternalLinkWithPathAndTokens() {
     $data = [];
 
     $data[] = ['{{ foo }}', ['{{ foo }}' => 'http://www.example.com'], '<a href="http://www.example.com">value</a>', ['context_path' => 'http://www.example.com']];
@@ -745,7 +745,7 @@ class FieldPluginBaseTest extends UnitTestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestGetRenderTokensWithQuery(): array {
+  public static function providerTestGetRenderTokensWithQuery(): array {
     $data = [];
     // No query parameters.
     $data[] = [
diff --git a/core/modules/views/tests/src/Unit/Plugin/field/FieldTest.php b/core/modules/views/tests/src/Unit/Plugin/field/FieldTest.php
index 999d55fb91d3..a6eeea7bdfd0 100644
--- a/core/modules/views/tests/src/Unit/Plugin/field/FieldTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/field/FieldTest.php
@@ -639,7 +639,7 @@ class FieldTest extends UnitTestCase {
   /**
    * Provides test data for testPrepareItemsByDelta().
    */
-  public function providerTestPrepareItemsByDelta() {
+  public static function providerTestPrepareItemsByDelta() {
     $data = [];
 
     // Let's display all values.
@@ -706,7 +706,7 @@ class FieldTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerSortOrders() {
+  public static function providerSortOrders() {
     return [
       ['asc'],
       ['desc'],
diff --git a/core/modules/views/tests/src/Unit/Plugin/filter/FilterPluginBaseTest.php b/core/modules/views/tests/src/Unit/Plugin/filter/FilterPluginBaseTest.php
index 45b1778deaa5..6ef76466f48d 100644
--- a/core/modules/views/tests/src/Unit/Plugin/filter/FilterPluginBaseTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/filter/FilterPluginBaseTest.php
@@ -34,7 +34,7 @@ class FilterPluginBaseTest extends UnitTestCase {
    * @return array
    *   The data set.
    */
-  public function acceptExposedInputProvider() {
+  public static function acceptExposedInputProvider() {
     return [
       'not-exposed' => [TRUE, ['exposed' => FALSE], []],
       'exposed-no-input' => [TRUE, ['exposed' => TRUE], []],
diff --git a/core/modules/views/tests/src/Unit/Plugin/pager/PagerPluginBaseTest.php b/core/modules/views/tests/src/Unit/Plugin/pager/PagerPluginBaseTest.php
index 053382c8838d..e8906f874fb1 100644
--- a/core/modules/views/tests/src/Unit/Plugin/pager/PagerPluginBaseTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/pager/PagerPluginBaseTest.php
@@ -185,7 +185,7 @@ class PagerPluginBaseTest extends UnitTestCase {
    *
    * @see self::testHasMoreRecords
    */
-  public function providerTestHasMoreRecords() {
+  public static function providerTestHasMoreRecords() {
     return [
       // No items per page, so there can't be more available records.
       [0, 0, 0, FALSE],
diff --git a/core/modules/views/tests/src/Unit/Plugin/views/query/MysqlDateSqlTest.php b/core/modules/views/tests/src/Unit/Plugin/views/query/MysqlDateSqlTest.php
index 03f381174b71..c797edbd208a 100644
--- a/core/modules/views/tests/src/Unit/Plugin/views/query/MysqlDateSqlTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/views/query/MysqlDateSqlTest.php
@@ -63,7 +63,7 @@ class MysqlDateSqlTest extends UnitTestCase {
   /**
    * Provider for date formatting test.
    */
-  public function providerTestGetDateFormat() {
+  public static function providerTestGetDateFormat() {
     return [
       ['foo.field', 'Y-y-M-m', '%Y-%y-%b-%m'],
       ['bar.field', 'n-F D d l', '%c-%M %a %d %W'],
diff --git a/core/modules/views/tests/src/Unit/Plugin/views/query/PostgresqlDateSqlTest.php b/core/modules/views/tests/src/Unit/Plugin/views/query/PostgresqlDateSqlTest.php
index e9379825d511..835882c36922 100644
--- a/core/modules/views/tests/src/Unit/Plugin/views/query/PostgresqlDateSqlTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/views/query/PostgresqlDateSqlTest.php
@@ -63,7 +63,7 @@ class PostgresqlDateSqlTest extends UnitTestCase {
   /**
    * Provider for date formatting test.
    */
-  public function providerTestGetDateFormat() {
+  public static function providerTestGetDateFormat() {
     return [
       ['foo.field', 'Y-y-M-m', 'YYYY-YY-Mon-MM'],
       ['bar.field', 'n-F D d l', 'MM-Month Dy DD Day'],
diff --git a/core/modules/views/tests/src/Unit/Plugin/views/query/SqliteDateSqlTest.php b/core/modules/views/tests/src/Unit/Plugin/views/query/SqliteDateSqlTest.php
index b7bc31f0557d..82fe4d5e0a44 100644
--- a/core/modules/views/tests/src/Unit/Plugin/views/query/SqliteDateSqlTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/views/query/SqliteDateSqlTest.php
@@ -65,7 +65,7 @@ class SqliteDateSqlTest extends UnitTestCase {
   /**
    * Provider for date formatting test.
    */
-  public function providerTestGetDateFormat() {
+  public static function providerTestGetDateFormat() {
     return [
       ['foo.field', 'Y-y-M-m', "strftime('%Y-%Y-%m-%m', foo.field, 'unixepoch')"],
       ['bar.field', 'n-F D d l', "strftime('%m-%m %d %d %d', bar.field, 'unixepoch')"],
diff --git a/core/modules/views/tests/src/Unit/PluginBaseTest.php b/core/modules/views/tests/src/Unit/PluginBaseTest.php
index e185aa7ca928..a7e4a22017ab 100644
--- a/core/modules/views/tests/src/Unit/PluginBaseTest.php
+++ b/core/modules/views/tests/src/Unit/PluginBaseTest.php
@@ -74,7 +74,7 @@ class PluginBaseTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestUnpackOptions() {
+  public static function providerTestUnpackOptions() {
     $test_parameters = [];
     // Set a storage but no value, so the storage value should be kept.
     $test_parameters[] = [
@@ -223,7 +223,7 @@ class PluginBaseTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestSetOptionDefault() {
+  public static function providerTestSetOptionDefault() {
     $test_parameters = [];
     // No definition should change anything on the storage.
     $test_parameters[] = [
@@ -289,7 +289,7 @@ class PluginBaseTest extends UnitTestCase {
     $this->assertEquals($expected_storage, $storage);
   }
 
-  public function providerTestFilterByDefinedOptions() {
+  public static function providerTestFilterByDefinedOptions() {
     $data = [];
 
     // A simple defined option.
diff --git a/core/modules/views/tests/src/Unit/ViewExecutableTest.php b/core/modules/views/tests/src/Unit/ViewExecutableTest.php
index f8eaaafedb70..8586455d7f71 100644
--- a/core/modules/views/tests/src/Unit/ViewExecutableTest.php
+++ b/core/modules/views/tests/src/Unit/ViewExecutableTest.php
@@ -444,7 +444,7 @@ class ViewExecutableTest extends UnitTestCase {
    * @return array[]
    *   Test data set.
    */
-  public function addHandlerProvider() {
+  public static function addHandlerProvider() {
     return [
       'field' => ['fields', 'field'],
       'filter' => ['filters', 'filter'],
@@ -519,7 +519,7 @@ class ViewExecutableTest extends UnitTestCase {
    *   An array of arrays containing the display state, a user's access to the
    *   display and whether it is expected or not that the display gets attached.
    */
-  public function providerAttachDisplays() {
+  public static function providerAttachDisplays() {
     return [
       'enabled-granted' => [static::DISPLAY_ENABLED, static::ACCESS_GRANTED, TRUE],
       'enabled-revoked' => [static::DISPLAY_ENABLED, static::ACCESS_REVOKED, FALSE],
@@ -742,7 +742,7 @@ class ViewExecutableTest extends UnitTestCase {
    * @return array[]
    *   An array of arrays containing the display state and expected value.
    */
-  public function providerExecuteReturn() {
+  public static function providerExecuteReturn() {
     return [
       'enabled' => [static::DISPLAY_ENABLED, TRUE],
       'disabled' => [static::DISPLAY_DISABLED, FALSE],
diff --git a/core/modules/views/tests/src/Unit/ViewsDataTest.php b/core/modules/views/tests/src/Unit/ViewsDataTest.php
index 49fbbbcc71a0..f3e4e92a3988 100644
--- a/core/modules/views/tests/src/Unit/ViewsDataTest.php
+++ b/core/modules/views/tests/src/Unit/ViewsDataTest.php
@@ -648,7 +648,7 @@ class ViewsDataTest extends UnitTestCase {
     $this->viewsData->get($key);
   }
 
-  public function providerTestGetEmptyKey() {
+  public static function providerTestGetEmptyKey() {
     return [
       [NULL],
       [''],
diff --git a/core/modules/views/tests/src/Unit/ViewsTest.php b/core/modules/views/tests/src/Unit/ViewsTest.php
index 5c750c9b0a9c..82e9b0580ea6 100644
--- a/core/modules/views/tests/src/Unit/ViewsTest.php
+++ b/core/modules/views/tests/src/Unit/ViewsTest.php
@@ -209,7 +209,7 @@ class ViewsTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestGetApplicableViews() {
+  public static function providerTestGetApplicableViews() {
     return [
       ['type_a', [['test_view_1', 'type_a']]],
       ['type_b', [['test_view_2', 'type_b']]],
diff --git a/core/modules/views/tests/src/Unit/WizardPluginBaseTest.php b/core/modules/views/tests/src/Unit/WizardPluginBaseTest.php
index 97f5dfd0f21f..3c2e84baf039 100644
--- a/core/modules/views/tests/src/Unit/WizardPluginBaseTest.php
+++ b/core/modules/views/tests/src/Unit/WizardPluginBaseTest.php
@@ -38,7 +38,7 @@ class WizardPluginBaseTest extends UnitTestCase {
   /**
    * Provides test data for testGetSelected().
    */
-  public function providerTestGetSelected() {
+  public static function providerTestGetSelected() {
     $data = [];
     // A form element with an invalid #type.
     $data['invalid_type'] = [
diff --git a/core/modules/views_ui/tests/src/Kernel/TagTest.php b/core/modules/views_ui/tests/src/Kernel/TagTest.php
index 3707d21c478e..ef10e203e79c 100644
--- a/core/modules/views_ui/tests/src/Kernel/TagTest.php
+++ b/core/modules/views_ui/tests/src/Kernel/TagTest.php
@@ -100,7 +100,7 @@ class TagTest extends ViewsKernelTestBase {
    * @return array[]
    *   The data set.
    */
-  public function providerViewsUiAutocompleteIndividualTags() {
+  public static function providerViewsUiAutocompleteIndividualTags() {
     return [
       'tag' => ['comma', 'comma'],
       'case insensitive tag' => ['comma', 'COMMA'],
diff --git a/core/modules/workflows/tests/src/Kernel/WorkflowAccessControlHandlerTest.php b/core/modules/workflows/tests/src/Kernel/WorkflowAccessControlHandlerTest.php
index df8496182127..6a2f9e3987d0 100644
--- a/core/modules/workflows/tests/src/Kernel/WorkflowAccessControlHandlerTest.php
+++ b/core/modules/workflows/tests/src/Kernel/WorkflowAccessControlHandlerTest.php
@@ -119,7 +119,7 @@ class WorkflowAccessControlHandlerTest extends KernelTestBase {
    *
    * @return array
    */
-  public function checkAccessProvider() {
+  public static function checkAccessProvider() {
     $container = new ContainerBuilder();
     $cache_contexts_manager = (new Prophet())->prophesize(CacheContextsManager::class);
     $cache_contexts_manager->assertValidTokens()->willReturn(TRUE);
diff --git a/core/modules/workflows/tests/src/Unit/WorkflowStateTransitionOperationsAccessCheckTest.php b/core/modules/workflows/tests/src/Unit/WorkflowStateTransitionOperationsAccessCheckTest.php
index ad01d100e8ac..1f7b4ed45177 100644
--- a/core/modules/workflows/tests/src/Unit/WorkflowStateTransitionOperationsAccessCheckTest.php
+++ b/core/modules/workflows/tests/src/Unit/WorkflowStateTransitionOperationsAccessCheckTest.php
@@ -50,7 +50,7 @@ class WorkflowStateTransitionOperationsAccessCheckTest extends UnitTestCase {
   /**
    * Test cases for ::testAccess.
    */
-  public function accessTestCases() {
+  public static function accessTestCases() {
     return [
       'Transition add' => [
         'add-transition',
@@ -140,7 +140,7 @@ class WorkflowStateTransitionOperationsAccessCheckTest extends UnitTestCase {
   /**
    * Test cases for ::testInvalidOperationName.
    */
-  public function invalidOperationNameTestCases() {
+  public static function invalidOperationNameTestCases() {
     return [
       ['invalid-op'],
       ['foo-add-transition'],
diff --git a/core/modules/workspaces/tests/src/Kernel/WorkspaceAccessTest.php b/core/modules/workspaces/tests/src/Kernel/WorkspaceAccessTest.php
index 87d111cd5bc8..b3e86398b58b 100644
--- a/core/modules/workspaces/tests/src/Kernel/WorkspaceAccessTest.php
+++ b/core/modules/workspaces/tests/src/Kernel/WorkspaceAccessTest.php
@@ -49,7 +49,7 @@ class WorkspaceAccessTest extends KernelTestBase {
    * @return array
    *   An array of operations and permissions to test with.
    */
-  public function operationCases() {
+  public static function operationCases() {
     return [
       ['create', 'administer workspaces'],
       ['create', 'create workspace'],
diff --git a/core/modules/workspaces/tests/src/Kernel/WorkspaceIntegrationTest.php b/core/modules/workspaces/tests/src/Kernel/WorkspaceIntegrationTest.php
index 78702d398c75..01884992fb78 100644
--- a/core/modules/workspaces/tests/src/Kernel/WorkspaceIntegrationTest.php
+++ b/core/modules/workspaces/tests/src/Kernel/WorkspaceIntegrationTest.php
@@ -752,7 +752,7 @@ class WorkspaceIntegrationTest extends KernelTestBase {
   /**
    * Data provider for allowed entity CRUD operations.
    */
-  public function providerTestAllowedEntityCrudInNonDefaultWorkspace() {
+  public static function providerTestAllowedEntityCrudInNonDefaultWorkspace() {
     return [
       'workspace-provided non-internal entity type' => [
         'entity_type_id' => 'workspace',
diff --git a/core/modules/workspaces/tests/src/Unit/ActiveWorkspaceCheckTest.php b/core/modules/workspaces/tests/src/Unit/ActiveWorkspaceCheckTest.php
index b5093824ca92..1105dcfd5773 100644
--- a/core/modules/workspaces/tests/src/Unit/ActiveWorkspaceCheckTest.php
+++ b/core/modules/workspaces/tests/src/Unit/ActiveWorkspaceCheckTest.php
@@ -46,7 +46,7 @@ class ActiveWorkspaceCheckTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestAccess() {
+  public static function providerTestAccess() {
     return [
       [[], FALSE, FALSE],
       [[], TRUE, FALSE],
diff --git a/core/tests/Drupal/BuildTests/Composer/Component/ComponentsTaggedReleaseTest.php b/core/tests/Drupal/BuildTests/Composer/Component/ComponentsTaggedReleaseTest.php
index ae3a08ec3627..5640ff4dde21 100644
--- a/core/tests/Drupal/BuildTests/Composer/Component/ComponentsTaggedReleaseTest.php
+++ b/core/tests/Drupal/BuildTests/Composer/Component/ComponentsTaggedReleaseTest.php
@@ -26,7 +26,7 @@ class ComponentsTaggedReleaseTest extends ComposerBuildTestBase {
    *   - Second element is the resulting constraint which should be present in
    *     the component core dependencies.
    */
-  public function providerVersionConstraint(): array {
+  public static function providerVersionConstraint(): array {
     return [
       // [Tag, constraint]
       '1.0.x-dev' => ['1.0.x-dev', '1.0.x-dev'],
diff --git a/core/tests/Drupal/BuildTests/Composer/Template/ComposerProjectTemplatesTest.php b/core/tests/Drupal/BuildTests/Composer/Template/ComposerProjectTemplatesTest.php
index a3420045751c..cfbd463ddb32 100644
--- a/core/tests/Drupal/BuildTests/Composer/Template/ComposerProjectTemplatesTest.php
+++ b/core/tests/Drupal/BuildTests/Composer/Template/ComposerProjectTemplatesTest.php
@@ -67,7 +67,7 @@ class ComposerProjectTemplatesTest extends ComposerBuildTestBase {
     return $data;
   }
 
-  public function provideTemplateCreateProject() {
+  public static function provideTemplateCreateProject() {
     return [
       'recommended-project' => [
         'drupal/recommended-project',
diff --git a/core/tests/Drupal/FunctionalJavascriptTests/Ajax/FormValuesTest.php b/core/tests/Drupal/FunctionalJavascriptTests/Ajax/FormValuesTest.php
index c6996f06d31e..c2a1d3e5a880 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/Ajax/FormValuesTest.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/Ajax/FormValuesTest.php
@@ -117,7 +117,7 @@ class FormValuesTest extends WebDriverTestBase {
   /**
    * Data provider for testSimpleAjaxFormValue.
    */
-  public function formModeProvider() {
+  public static function formModeProvider() {
     return [
       ['direct'],
       ['dialog'],
diff --git a/core/tests/Drupal/FunctionalJavascriptTests/MachineName/MachineNameTransliterationTest.php b/core/tests/Drupal/FunctionalJavascriptTests/MachineName/MachineNameTransliterationTest.php
index d223feab7b5a..74546cb8104f 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/MachineName/MachineNameTransliterationTest.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/MachineName/MachineNameTransliterationTest.php
@@ -70,7 +70,7 @@ class MachineNameTransliterationTest extends WebDriverTestBase {
    *
    * @return array
    */
-  public function machineNameInputOutput(): array {
+  public static function machineNameInputOutput(): array {
     return [
       // cSpell:disable
       ['en', 'Bob', 'bob'],
diff --git a/core/tests/Drupal/FunctionalTests/Entity/RevisionDeleteFormTest.php b/core/tests/Drupal/FunctionalTests/Entity/RevisionDeleteFormTest.php
index ff8a8ab18b91..7899ebe05e90 100644
--- a/core/tests/Drupal/FunctionalTests/Entity/RevisionDeleteFormTest.php
+++ b/core/tests/Drupal/FunctionalTests/Entity/RevisionDeleteFormTest.php
@@ -85,7 +85,7 @@ class RevisionDeleteFormTest extends BrowserTestBase {
   /**
    * Data provider for testPageTitle.
    */
-  public function providerPageTitle(): array {
+  public static function providerPageTitle(): array {
     return [
       ['entity_test_rev', 'Are you sure you want to delete the revision?'],
       ['entity_test_revlog', 'Are you sure you want to delete the revision from Sun, 01/11/2009 - 16:00?'],
@@ -276,7 +276,7 @@ class RevisionDeleteFormTest extends BrowserTestBase {
   /**
    * Data provider for testSubmitForm.
    */
-  public function providerSubmitForm(): array {
+  public static function providerSubmitForm(): array {
     $data = [];
 
     $data['not supporting revision log, one revision remaining after delete, no view access'] = [
diff --git a/core/tests/Drupal/FunctionalTests/Entity/RevisionRevertFormTest.php b/core/tests/Drupal/FunctionalTests/Entity/RevisionRevertFormTest.php
index 1597137797b3..6c774ae37ab4 100644
--- a/core/tests/Drupal/FunctionalTests/Entity/RevisionRevertFormTest.php
+++ b/core/tests/Drupal/FunctionalTests/Entity/RevisionRevertFormTest.php
@@ -86,7 +86,7 @@ class RevisionRevertFormTest extends BrowserTestBase {
   /**
    * Data provider for testPageTitle.
    */
-  public function providerPageTitle(): array {
+  public static function providerPageTitle(): array {
     return [
       ['entity_test_rev', 'Are you sure you want to revert the revision?'],
       ['entity_test_revlog', 'Are you sure you want to revert to the revision from Sun, 01/11/2009 - 16:00?'],
@@ -227,7 +227,7 @@ class RevisionRevertFormTest extends BrowserTestBase {
   /**
    * Data provider for testSubmitForm.
    */
-  public function providerSubmitForm(): array {
+  public static function providerSubmitForm(): array {
     $data = [];
 
     $data['not supporting revision log, no version history access'] = [
diff --git a/core/tests/Drupal/FunctionalTests/Entity/RevisionViewTest.php b/core/tests/Drupal/FunctionalTests/Entity/RevisionViewTest.php
index f728b6c95802..f2054caf7f16 100644
--- a/core/tests/Drupal/FunctionalTests/Entity/RevisionViewTest.php
+++ b/core/tests/Drupal/FunctionalTests/Entity/RevisionViewTest.php
@@ -106,7 +106,7 @@ class RevisionViewTest extends BrowserTestBase {
   /**
    * Data provider for testRevisionPage.
    */
-  public function providerRevisionPage(): array {
+  public static function providerRevisionPage(): array {
     return [
       ['entity_test_rev', 'Revision of revision 1, view revision'],
       ['entity_test_revlog', 'Revision of revision 1, view revision from Sun, 01/11/2009 - 16:00'],
diff --git a/core/tests/Drupal/FunctionalTests/Libraries/JqueryUiLibraryAssetsTest.php b/core/tests/Drupal/FunctionalTests/Libraries/JqueryUiLibraryAssetsTest.php
index e9bcedaa2f3d..1c144d9173f4 100644
--- a/core/tests/Drupal/FunctionalTests/Libraries/JqueryUiLibraryAssetsTest.php
+++ b/core/tests/Drupal/FunctionalTests/Libraries/JqueryUiLibraryAssetsTest.php
@@ -344,7 +344,7 @@ class JqueryUiLibraryAssetsTest extends BrowserTestBase {
    *     library prior to the change from jQuery UI library dependencies to
    *     direct file inclusion.
    */
-  public function providerTestAssetLoading() {
+  public static function providerTestAssetLoading() {
     return [
       'drupal.autocomplete' => [
         'library' => 'drupal.autocomplete',
diff --git a/core/tests/Drupal/FunctionalTests/Routing/RouteCachingLanguageTest.php b/core/tests/Drupal/FunctionalTests/Routing/RouteCachingLanguageTest.php
index 242f9e424677..e620d5c1f3d6 100644
--- a/core/tests/Drupal/FunctionalTests/Routing/RouteCachingLanguageTest.php
+++ b/core/tests/Drupal/FunctionalTests/Routing/RouteCachingLanguageTest.php
@@ -190,7 +190,7 @@ class RouteCachingLanguageTest extends BrowserTestBase {
   /**
    * Data provider for testFromUri().
    */
-  public function providerLanguage() {
+  public static function providerLanguage() {
     return [
       ['en'],
       ['fr'],
diff --git a/core/tests/Drupal/KernelTests/Component/Render/FormattableMarkupKernelTest.php b/core/tests/Drupal/KernelTests/Component/Render/FormattableMarkupKernelTest.php
index ae2b16367abe..5a33a900b86e 100644
--- a/core/tests/Drupal/KernelTests/Component/Render/FormattableMarkupKernelTest.php
+++ b/core/tests/Drupal/KernelTests/Component/Render/FormattableMarkupKernelTest.php
@@ -50,7 +50,7 @@ class FormattableMarkupKernelTest extends KernelTestBase {
   /**
    * @return array
    */
-  public function providerTestFormattableMarkupUri() {
+  public static function providerTestFormattableMarkupUri() {
     $data = [];
     $data['routed-url'] = [
       'Hey giraffe <a href=":url">MUUUH</a>',
@@ -112,7 +112,7 @@ class FormattableMarkupKernelTest extends KernelTestBase {
   /**
    * @return array
    */
-  public function providerTestFormattableMarkupUriWithException() {
+  public static function providerTestFormattableMarkupUriWithException() {
     $data = [];
     $data['js-protocol'] = [
       'Hey giraffe <a href=":url">MUUUH</a>',
diff --git a/core/tests/Drupal/KernelTests/Config/DefaultConfigTest.php b/core/tests/Drupal/KernelTests/Config/DefaultConfigTest.php
index 396623bec75e..07dcf47f9db7 100644
--- a/core/tests/Drupal/KernelTests/Config/DefaultConfigTest.php
+++ b/core/tests/Drupal/KernelTests/Config/DefaultConfigTest.php
@@ -143,7 +143,7 @@ class DefaultConfigTest extends KernelTestBase {
    *   An array of theme names to test, with both key and value being the name
    *   of the theme.
    */
-  public function themeListDataProvider() {
+  public static function themeListDataProvider() {
     $prefix = dirname(__DIR__, 4) . DIRECTORY_SEPARATOR . 'themes';
     $theme_dirs = array_keys(iterator_to_array(new \FilesystemIterator($prefix)));
     $theme_names = array_map(function ($path) use ($prefix) {
diff --git a/core/tests/Drupal/KernelTests/Config/Schema/MappingTest.php b/core/tests/Drupal/KernelTests/Config/Schema/MappingTest.php
index 0ca7c28c38a3..61d8c31295d2 100644
--- a/core/tests/Drupal/KernelTests/Config/Schema/MappingTest.php
+++ b/core/tests/Drupal/KernelTests/Config/Schema/MappingTest.php
@@ -175,7 +175,7 @@ class MappingTest extends KernelTestBase {
    *
    * @return \Generator
    */
-  public function providerMappingInterpretation(): \Generator {
+  public static function providerMappingInterpretation(): \Generator {
     $available_block_settings_types = [
       'block.settings.field_block:*:*:*' => [
         'formatter',
diff --git a/core/tests/Drupal/KernelTests/Core/Asset/DeprecatedAssetsTest.php b/core/tests/Drupal/KernelTests/Core/Asset/DeprecatedAssetsTest.php
index 6f41b1c9bd5f..bd7f3ac0eeac 100644
--- a/core/tests/Drupal/KernelTests/Core/Asset/DeprecatedAssetsTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Asset/DeprecatedAssetsTest.php
@@ -57,7 +57,7 @@ class DeprecatedAssetsTest extends KernelTestBase {
    * @return array
    *   See description above.
    */
-  public function deprecatedLibrariesProvider(): array {
+  public static function deprecatedLibrariesProvider(): array {
     return [
       'Tests deprecation of library core/js-cookie' => [
         'core',
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigDependencyTest.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigDependencyTest.php
index a2ad515b7c51..352f9b9f7464 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigDependencyTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigDependencyTest.php
@@ -227,7 +227,7 @@ class ConfigDependencyTest extends EntityKernelTestBase {
   /**
    * Data provider for self::testConfigEntityUninstallComplex().
    */
-  public function providerConfigEntityUninstallComplex() {
+  public static function providerConfigEntityUninstallComplex() {
     // Ensure that alphabetical order has no influence on dependency fixing and
     // removal.
     return [
diff --git a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityValidationTestBase.php b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityValidationTestBase.php
index 8b48cdd6ee23..30ed78fd7e17 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityValidationTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/ConfigEntityValidationTestBase.php
@@ -201,7 +201,7 @@ abstract class ConfigEntityValidationTestBase extends KernelTestBase {
    * @return array[]
    *   The test cases.
    */
-  public function providerConfigDependenciesValidation(): array {
+  public static function providerConfigDependenciesValidation(): array {
     return [
       'valid dependency types' => [
         [
diff --git a/core/tests/Drupal/KernelTests/Core/Config/SchemaCheckTraitTest.php b/core/tests/Drupal/KernelTests/Core/Config/SchemaCheckTraitTest.php
index de38eaaa6ea5..aa5149e494b8 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/SchemaCheckTraitTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/SchemaCheckTraitTest.php
@@ -72,7 +72,7 @@ class SchemaCheckTraitTest extends KernelTestBase {
     $this->assertEquals($no_data_expectations, $ret);
   }
 
-  public function providerCheckConfigSchema(): array {
+  public static function providerCheckConfigSchema(): array {
     // Storage type check errors.
     // @see \Drupal\Core\Config\Schema\SchemaCheckTrait::checkValue()
     $expected_storage_null_check_errors = [
diff --git a/core/tests/Drupal/KernelTests/Core/Config/SimpleConfigValidationTest.php b/core/tests/Drupal/KernelTests/Core/Config/SimpleConfigValidationTest.php
index 5da73d743391..f714ab65f707 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/SimpleConfigValidationTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/SimpleConfigValidationTest.php
@@ -78,7 +78,7 @@ class SimpleConfigValidationTest extends KernelTestBase {
    * @return array[]
    *   The test cases.
    */
-  public function providerSpecialCharacters(): array {
+  public static function providerSpecialCharacters(): array {
     $data = [];
 
     for ($code_point = 0; $code_point < 32; $code_point++) {
diff --git a/core/tests/Drupal/KernelTests/Core/Config/Storage/StorageReplaceDataWrapperTest.php b/core/tests/Drupal/KernelTests/Core/Config/Storage/StorageReplaceDataWrapperTest.php
index 98bd908f0979..a4e6cd2fd9d3 100644
--- a/core/tests/Drupal/KernelTests/Core/Config/Storage/StorageReplaceDataWrapperTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Config/Storage/StorageReplaceDataWrapperTest.php
@@ -80,7 +80,7 @@ class StorageReplaceDataWrapperTest extends ConfigStorageTestBase {
    * @return array
    *   Returns an array of collection names.
    */
-  public function providerCollections() {
+  public static function providerCollections() {
     return [
       [StorageInterface::DEFAULT_COLLECTION],
       ['foo.bar'],
diff --git a/core/tests/Drupal/KernelTests/Core/Database/DriverSpecificSchemaTestBase.php b/core/tests/Drupal/KernelTests/Core/Database/DriverSpecificSchemaTestBase.php
index 0a2c16501917..56e796e33dbb 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/DriverSpecificSchemaTestBase.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/DriverSpecificSchemaTestBase.php
@@ -649,7 +649,7 @@ abstract class DriverSpecificSchemaTestBase extends DriverSpecificKernelTestBase
    * @return array
    *   An array of test cases for SchemaTest::testSchemaCreateTablePrimaryKey().
    */
-  public function providerTestSchemaCreateTablePrimaryKey() {
+  public static function providerTestSchemaCreateTablePrimaryKey() {
     $tests = [];
 
     $tests['simple_primary_key'] = [
diff --git a/core/tests/Drupal/KernelTests/Core/Database/LoggingTest.php b/core/tests/Drupal/KernelTests/Core/Database/LoggingTest.php
index f6db6e65d2f8..438e442bd693 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/LoggingTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/LoggingTest.php
@@ -186,7 +186,7 @@ class LoggingTest extends DatabaseTestBase {
    *
    * @see ::testContribDriverLog()
    */
-  public function providerContribDriverLog() {
+  public static function providerContribDriverLog() {
     $stack = [
       [
         'file' => '/var/www/core/lib/Drupal/Core/Database/Log.php',
diff --git a/core/tests/Drupal/KernelTests/Core/Database/SelectExtenderTest.php b/core/tests/Drupal/KernelTests/Core/Database/SelectExtenderTest.php
index c2a62186e09c..6283b48d13ee 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/SelectExtenderTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/SelectExtenderTest.php
@@ -25,7 +25,7 @@ class SelectExtenderTest extends KernelTestBase {
    *   - The database driver namespace.
    *   - The namespaced class name for which to extend.
    */
-  public function providerExtend(): array {
+  public static function providerExtend(): array {
     return [
       [
         'Drupal\Core\Database\Query\PagerSelectExtender',
diff --git a/core/tests/Drupal/KernelTests/Core/Database/SelectLeastTest.php b/core/tests/Drupal/KernelTests/Core/Database/SelectLeastTest.php
index 7db76d03c568..8afe32e38637 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/SelectLeastTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/SelectLeastTest.php
@@ -19,7 +19,7 @@ class SelectLeastTest extends DatabaseTestBase {
     $this->assertEquals($expected, $least);
   }
 
-  public function selectLeastProvider() {
+  public static function selectLeastProvider() {
     return [
       [[1, 2, 3, 4, 5, 6], 1],
       [['A', 'B', 'C', 'NULL', 'F'], 'A'],
diff --git a/core/tests/Drupal/KernelTests/Core/Database/SelectTest.php b/core/tests/Drupal/KernelTests/Core/Database/SelectTest.php
index 68ea5ebb2f80..256da561a17e 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/SelectTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/SelectTest.php
@@ -498,7 +498,7 @@ class SelectTest extends DatabaseTestBase {
    *     - the regular expression pattern to search for.
    *     - the regular expression operator 'REGEXP' or 'NOT REGEXP'.
    */
-  public function providerRegularExpressionCondition() {
+  public static function providerRegularExpressionCondition() {
     return [
       [['John'], 'name', 'hn$', 'REGEXP'],
       [['Paul'], 'name', '^Pau', 'REGEXP'],
@@ -598,7 +598,7 @@ class SelectTest extends DatabaseTestBase {
    *   Array of non array compatible operators and its value in the expected
    *   exception message.
    */
-  public function providerNonArrayOperatorWithArrayValueCondition() {
+  public static function providerNonArrayOperatorWithArrayValueCondition() {
     return [
       '=' => ['=', '='],
       '>' => ['>', '>'],
diff --git a/core/tests/Drupal/KernelTests/Core/Datetime/DatetimeElementFormTest.php b/core/tests/Drupal/KernelTests/Core/Datetime/DatetimeElementFormTest.php
index 958dc6132409..231d1834f4ca 100644
--- a/core/tests/Drupal/KernelTests/Core/Datetime/DatetimeElementFormTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Datetime/DatetimeElementFormTest.php
@@ -175,7 +175,7 @@ class DatetimeElementFormTest extends KernelTestBase implements FormInterface, T
    * @return string[][]
    *   Test cases.
    */
-  public function providerUntrusted() : array {
+  public static function providerUntrusted() : array {
     return [
       'untrusted date' => [
         'datetimeDateCallback',
diff --git a/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php b/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php
index ffa8cc7c7caf..ff1d2d5d5516 100644
--- a/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php
+++ b/core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php
@@ -189,7 +189,7 @@ class DrupalKernelTest extends KernelTestBase {
    * Data provider for self::testClassLoaderAutoDetect.
    * @return array
    */
-  public function providerClassLoaderAutoDetect() {
+  public static function providerClassLoaderAutoDetect() {
     return [
       'TRUE' => [TRUE],
       'FALSE' => [FALSE],
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityStorageBaseTest.php b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityStorageBaseTest.php
index 88b4395841e7..fd71efa81f24 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityStorageBaseTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityStorageBaseTest.php
@@ -41,7 +41,7 @@ class ContentEntityStorageBaseTest extends KernelTestBase {
   /**
    * Provides test data for testCreate().
    */
-  public function providerTestCreate() {
+  public static function providerTestCreate() {
     return [
       ['scalar' => 'test_bundle'],
       ['array keyed by delta' => [0 => ['value' => 'test_bundle']]],
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityAccessControlHandlerTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityAccessControlHandlerTest.php
index 3a34d85990d1..bf2ecb9519d1 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityAccessControlHandlerTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityAccessControlHandlerTest.php
@@ -343,7 +343,7 @@ class EntityAccessControlHandlerTest extends EntityLanguageTestBase {
     $this->assertEquals('The entity ID cannot be changed.', $access_result->getReason());
   }
 
-  public function providerTestFieldAccess() {
+  public static function providerTestFieldAccess() {
     return [
       'serial ID entity' => [
         EntityTest::class,
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityDecoupledTranslationRevisionsTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityDecoupledTranslationRevisionsTest.php
index bcd9955e6cae..88f418d67fe0 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityDecoupledTranslationRevisionsTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityDecoupledTranslationRevisionsTest.php
@@ -109,7 +109,7 @@ class EntityDecoupledTranslationRevisionsTest extends EntityKernelTestBase {
   /**
    * Data provider for ::testDecoupledDefaultRevisions.
    */
-  public function dataTestDecoupledPendingRevisions() {
+  public static function dataTestDecoupledPendingRevisions() {
     $sets = [];
 
     $sets['Intermixed languages - No initial default translation'][] = [
@@ -211,7 +211,7 @@ class EntityDecoupledTranslationRevisionsTest extends EntityKernelTestBase {
   /**
    * Data provider for ::testUntranslatableFields.
    */
-  public function dataTestUntranslatableFields() {
+  public static function dataTestUntranslatableFields() {
     $sets = [];
 
     $sets['Default behavior - Untranslatable fields affect all revisions'] = [
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityDefinitionUpdateTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityDefinitionUpdateTest.php
index 48b33b75512e..e71016b70459 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityDefinitionUpdateTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityDefinitionUpdateTest.php
@@ -669,7 +669,7 @@ class EntityDefinitionUpdateTest extends EntityKernelTestBase {
   /**
    * Test cases for ::testBaseFieldDeleteWithExistingData.
    */
-  public function baseFieldDeleteWithExistingDataTestCases() {
+  public static function baseFieldDeleteWithExistingDataTestCases() {
     return [
       'Non-revisionable, non-translatable entity type' => [
         'entity_test_update',
@@ -1296,7 +1296,7 @@ class EntityDefinitionUpdateTest extends EntityKernelTestBase {
   /**
    * Test cases for ::testInitialValueFromField.
    */
-  public function initialValueFromFieldTestCases() {
+  public static function initialValueFromFieldTestCases() {
     return [
       'literal value' => [
         'test initial value',
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityDeriverTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityDeriverTest.php
index 9ae3f6bf32d4..66ce30dd09b3 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityDeriverTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityDeriverTest.php
@@ -68,7 +68,7 @@ class EntityDeriverTest extends KernelTestBase {
   /**
    * Provides test data for ::testDerivatives().
    */
-  public function derivativesProvider() {
+  public static function derivativesProvider() {
     return [
       'un-bundleable entity type with no bundle type' => ['entity:user', FALSE],
       'un-bundleable entity type with bundle type' => ['entity:user:user', TRUE],
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityKeysTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityKeysTest.php
index 18eb76267d3b..0b5d95eb6ca6 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityKeysTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityKeysTest.php
@@ -42,7 +42,7 @@ class EntityKeysTest extends EntityKernelTestBase {
   /**
    * Data provider for ::testMultipleKeysCache.
    */
-  public function multipleKeysCacheTestCases() {
+  public static function multipleKeysCacheTestCases() {
     return [
       'translatable Entity Key' => [
         TRUE,
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntitySchemaTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntitySchemaTest.php
index 4528445ca162..b231f6d73fc0 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntitySchemaTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntitySchemaTest.php
@@ -282,7 +282,7 @@ class EntitySchemaTest extends EntityKernelTestBase {
    * @return array
    *   An array of test cases consisting of an entity type ID and a field name.
    */
-  public function providerTestPrimaryKeyUpdate() {
+  public static function providerTestPrimaryKeyUpdate() {
     // Build up test cases for all possible entity type configurations.
     // For each entity type we test reinstalling each field that is part of
     // any table's primary key.
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityTypedDataDefinitionTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityTypedDataDefinitionTest.php
index d4f0fe685490..0d40daef92fd 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityTypedDataDefinitionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityTypedDataDefinitionTest.php
@@ -171,7 +171,7 @@ class EntityTypedDataDefinitionTest extends KernelTestBase {
   /**
    * Provides test cases for testEntityDefinitionIsInternal.
    */
-  public function entityDefinitionIsInternalProvider() {
+  public static function entityDefinitionIsInternalProvider() {
     return [
       'internal' => [TRUE, TRUE],
       'external' => [FALSE, FALSE],
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/FieldableEntityDefinitionUpdateTest.php b/core/tests/Drupal/KernelTests/Core/Entity/FieldableEntityDefinitionUpdateTest.php
index 7e96479bb428..7b69cf8a7c12 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/FieldableEntityDefinitionUpdateTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/FieldableEntityDefinitionUpdateTest.php
@@ -185,7 +185,7 @@ class FieldableEntityDefinitionUpdateTest extends EntityKernelTestBase {
   /**
    * Data provider for testFieldableEntityTypeUpdates().
    */
-  public function providerTestFieldableEntityTypeUpdates() {
+  public static function providerTestFieldableEntityTypeUpdates() {
     return [
       'no change' => [
         'initial_rev' => FALSE,
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/RevisionRouteProviderTest.php b/core/tests/Drupal/KernelTests/Core/Entity/RevisionRouteProviderTest.php
index 59cd473b6c48..f0c24260b532 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/RevisionRouteProviderTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/RevisionRouteProviderTest.php
@@ -104,7 +104,7 @@ class RevisionRouteProviderTest extends KernelTestBase {
    * @return array
    *   Data for testing.
    */
-  public function providerOperationAccessRevisionRoutes(): array {
+  public static function providerOperationAccessRevisionRoutes(): array {
     $data = [];
 
     $data['view revision'] = [
diff --git a/core/tests/Drupal/KernelTests/Core/Extension/ModuleInstallerTest.php b/core/tests/Drupal/KernelTests/Core/Extension/ModuleInstallerTest.php
index 743178fa9d9e..04ff69d5cc79 100644
--- a/core/tests/Drupal/KernelTests/Core/Extension/ModuleInstallerTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Extension/ModuleInstallerTest.php
@@ -102,7 +102,7 @@ class ModuleInstallerTest extends KernelTestBase {
   /**
    * Data provider for testInvalidCoreInstall().
    */
-  public function providerTestInvalidCoreInstall() {
+  public static function providerTestInvalidCoreInstall() {
     return [
       'no dependencies system_core_incompatible_semver_test' => [
         'system_core_incompatible_semver_test',
diff --git a/core/tests/Drupal/KernelTests/Core/Field/Entity/BaseFieldOverrideTest.php b/core/tests/Drupal/KernelTests/Core/Field/Entity/BaseFieldOverrideTest.php
index 92c1b98cc047..5b959bb860f7 100644
--- a/core/tests/Drupal/KernelTests/Core/Field/Entity/BaseFieldOverrideTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Field/Entity/BaseFieldOverrideTest.php
@@ -52,7 +52,7 @@ class BaseFieldOverrideTest extends KernelTestBase {
   /**
    * Test cases for ::testGetClass.
    */
-  public function getClassTestCases() {
+  public static function getClassTestCases() {
     return [
       'String (default class)' => [
         'string',
diff --git a/core/tests/Drupal/KernelTests/Core/File/FileUrlGeneratorTest.php b/core/tests/Drupal/KernelTests/Core/File/FileUrlGeneratorTest.php
index 5359ee3fc56a..1ccb74990c6b 100644
--- a/core/tests/Drupal/KernelTests/Core/File/FileUrlGeneratorTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/FileUrlGeneratorTest.php
@@ -219,7 +219,7 @@ class FileUrlGeneratorTest extends FileTestBase {
   /**
    * Data provider.
    */
-  public function providerGenerateURI() {
+  public static function providerGenerateURI() {
     return [
       'schemaless' =>
         [
diff --git a/core/tests/Drupal/KernelTests/Core/File/UrlTransformRelativeTest.php b/core/tests/Drupal/KernelTests/Core/File/UrlTransformRelativeTest.php
index c24bd75e3f54..c6eefa1f446d 100644
--- a/core/tests/Drupal/KernelTests/Core/File/UrlTransformRelativeTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/UrlTransformRelativeTest.php
@@ -43,7 +43,7 @@ class UrlTransformRelativeTest extends KernelTestBase {
     $this->assertSame($expected, \Drupal::service('file_url_generator')->transformRelative($url, $root_relative));
   }
 
-  public function providerFileUrlTransformRelative() {
+  public static function providerFileUrlTransformRelative() {
     $data = [
       'http' => [
         'example.com',
diff --git a/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php b/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php
index 267538134db6..adfb42294764 100644
--- a/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php
@@ -105,7 +105,7 @@ class ToolkitGdTest extends KernelTestBase {
   /**
    * Data provider for ::testManipulations().
    */
-  public function providerTestImageFiles(): array {
+  public static function providerTestImageFiles(): array {
     // Typically the corner colors will be unchanged. These colors are in the
     // order of top-left, top-right, bottom-right, bottom-left.
     $default_corners = [static::RED, static::GREEN, static::BLUE, static::TRANSPARENT];
@@ -390,7 +390,7 @@ class ToolkitGdTest extends KernelTestBase {
   /**
    * Data provider for ::testCreateImageFromScratch().
    */
-  public function providerSupportedImageTypes(): array {
+  public static function providerSupportedImageTypes(): array {
     return [
       [IMAGETYPE_PNG],
       [IMAGETYPE_GIF],
diff --git a/core/tests/Drupal/KernelTests/Core/Installer/InstallerRedirectTraitTest.php b/core/tests/Drupal/KernelTests/Core/Installer/InstallerRedirectTraitTest.php
index 6b897941512a..41b2e770e307 100644
--- a/core/tests/Drupal/KernelTests/Core/Installer/InstallerRedirectTraitTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Installer/InstallerRedirectTraitTest.php
@@ -29,7 +29,7 @@ class InstallerRedirectTraitTest extends KernelTestBase {
    *   - Whether or not there is database connection info.
    *   - Whether or not there exists a sessions table in the database.
    */
-  public function providerShouldRedirectToInstaller() {
+  public static function providerShouldRedirectToInstaller() {
     return [
       [TRUE, DatabaseNotFoundException::class, FALSE, FALSE],
       [TRUE, DatabaseNotFoundException::class, TRUE, FALSE],
diff --git a/core/tests/Drupal/KernelTests/Core/Layout/IconBuilderTest.php b/core/tests/Drupal/KernelTests/Core/Layout/IconBuilderTest.php
index 92ac3cec7a25..3977ac885f58 100644
--- a/core/tests/Drupal/KernelTests/Core/Layout/IconBuilderTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Layout/IconBuilderTest.php
@@ -32,7 +32,7 @@ class IconBuilderTest extends KernelTestBase {
     $this->assertSame($expected, $output);
   }
 
-  public function providerTestBuild() {
+  public static function providerTestBuild() {
     $data = [];
     $data['empty'][] = (new SvgIconBuilder());
     $data['empty'][] = [];
diff --git a/core/tests/Drupal/KernelTests/Core/Pager/PagerManagerTest.php b/core/tests/Drupal/KernelTests/Core/Pager/PagerManagerTest.php
index 11faa4aeb4ac..6ec99deb050f 100644
--- a/core/tests/Drupal/KernelTests/Core/Pager/PagerManagerTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Pager/PagerManagerTest.php
@@ -81,7 +81,7 @@ class PagerManagerTest extends KernelTestBase {
    *   - Array of elements to pass to PagerManager::createPager().
    *   - The expected value returned by PagerManager::getMaxPagerElementId().
    */
-  public function providerTestGetMaxPagerElementId(): array {
+  public static function providerTestGetMaxPagerElementId(): array {
     return [
       'no_pager' => [[], -1],
       'single_pager' => [[0], 0],
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/Condition/ResponseStatusTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/Condition/ResponseStatusTest.php
index 33c407508e75..faec6e8c45f7 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/Condition/ResponseStatusTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/Condition/ResponseStatusTest.php
@@ -77,7 +77,7 @@ class ResponseStatusTest extends KernelTestBase {
   /**
    * Provides test data for testConditions.
    */
-  public function providerTestConditions() {
+  public static function providerTestConditions() {
     // Default values with 200 response code.
     yield [
       'status_codes' => [],
diff --git a/core/tests/Drupal/KernelTests/Core/Plugin/ContextTypedDataTest.php b/core/tests/Drupal/KernelTests/Core/Plugin/ContextTypedDataTest.php
index f75f65193bc6..d4a3770a587c 100644
--- a/core/tests/Drupal/KernelTests/Core/Plugin/ContextTypedDataTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Plugin/ContextTypedDataTest.php
@@ -63,7 +63,7 @@ class ContextTypedDataTest extends KernelTestBase {
   /**
    * Data provider for testHasContextValue.
    */
-  public function providerHasContextValue() {
+  public static function providerHasContextValue() {
     return [
       [TRUE, FALSE],
       [TRUE, 0],
diff --git a/core/tests/Drupal/KernelTests/Core/Routing/RouteProviderTest.php b/core/tests/Drupal/KernelTests/Core/Routing/RouteProviderTest.php
index 03c04c3c982a..30ea7be869b5 100644
--- a/core/tests/Drupal/KernelTests/Core/Routing/RouteProviderTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Routing/RouteProviderTest.php
@@ -204,7 +204,7 @@ class RouteProviderTest extends KernelTestBase {
   /**
    * Data provider for testMixedCasePaths()
    */
-  public function providerMixedCaseRoutePaths() {
+  public static function providerMixedCaseRoutePaths() {
     // cSpell:disable
     return [
       ['/path/one', 'route_a'],
@@ -254,7 +254,7 @@ class RouteProviderTest extends KernelTestBase {
   /**
    * Data provider for testMixedCasePaths()
    */
-  public function providerDuplicateRoutePaths() {
+  public static function providerDuplicateRoutePaths() {
     // When matching routes with the same fit the route with the lowest-sorting
     // name should end up first in the resulting route collection.
     return [
diff --git a/core/tests/Drupal/KernelTests/Core/StreamWrapper/StreamWrapperManagerTest.php b/core/tests/Drupal/KernelTests/Core/StreamWrapper/StreamWrapperManagerTest.php
index 2cc2ee5a4022..d548cab0140b 100644
--- a/core/tests/Drupal/KernelTests/Core/StreamWrapper/StreamWrapperManagerTest.php
+++ b/core/tests/Drupal/KernelTests/Core/StreamWrapper/StreamWrapperManagerTest.php
@@ -43,7 +43,7 @@ class StreamWrapperManagerTest extends KernelTestBase {
   /**
    * Data provider.
    */
-  public function providerTestUriScheme() {
+  public static function providerTestUriScheme() {
     $data = [];
     $data[] = [
       'public://filename',
diff --git a/core/tests/Drupal/KernelTests/Core/Test/Comparator/MarkupInterfaceComparatorTest.php b/core/tests/Drupal/KernelTests/Core/Test/Comparator/MarkupInterfaceComparatorTest.php
index 61cf2818080c..81db9967a6ec 100644
--- a/core/tests/Drupal/KernelTests/Core/Test/Comparator/MarkupInterfaceComparatorTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Test/Comparator/MarkupInterfaceComparatorTest.php
@@ -54,7 +54,7 @@ class MarkupInterfaceComparatorTest extends KernelTestBase {
    *     comparison should match, FALSE if error, or a class name of an object
    *     thrown.
    */
-  public function dataSetProvider() {
+  public static function dataSetProvider() {
     return [
       'FormattableMarkup vs FormattableMarkup, equal' => [
         new FormattableMarkup('GoldFinger', []),
@@ -162,7 +162,7 @@ class MarkupInterfaceComparatorTest extends KernelTestBase {
    *     thrown.
    *   - the expected deprecation message.
    */
-  public function dataSetProviderDeprecatedCases() {
+  public static function dataSetProviderDeprecatedCases() {
     return [
       'html string with tags vs FormattableMarkup, equal' => [
         '<em class="placeholder">For Your Eyes</em> Only',
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php b/core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php
index 1a1328dd5973..d5f74801f7cd 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php
@@ -218,7 +218,7 @@ class RegistryTest extends KernelTestBase {
    * @return array
    *   An associative array of 40x theme suggestions.
    */
-  public function provider40xThemeSuggestions() {
+  public static function provider40xThemeSuggestions() {
     return [
       [401, 'page__401'],
       [403, 'page__403'],
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php b/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php
index 0e2b1bd7ffce..2ba2622a6e80 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php
@@ -192,7 +192,7 @@ class ThemeInstallerTest extends KernelTestBase {
   /**
    * Data provider for testInstallThemeWithUnmetModuleDependencies().
    */
-  public function providerTestInstallThemeWithUnmetModuleDependencies() {
+  public static function providerTestInstallThemeWithUnmetModuleDependencies() {
     return [
       'theme with uninstalled module dependencies' => [
         'test_theme_depending_on_modules',
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/ThemeRenderAndAutoescapeTest.php b/core/tests/Drupal/KernelTests/Core/Theme/ThemeRenderAndAutoescapeTest.php
index a6708856467e..901be11a72f1 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/ThemeRenderAndAutoescapeTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/ThemeRenderAndAutoescapeTest.php
@@ -55,7 +55,7 @@ class ThemeRenderAndAutoescapeTest extends KernelTestBase {
   /**
    * Provide test examples.
    */
-  public function providerTestThemeRenderAndAutoescape() {
+  public static function providerTestThemeRenderAndAutoescape() {
     return [
       'empty string unchanged' => ['', ''],
       'simple string unchanged' => ['ab', 'ab'],
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php b/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php
index 7d3d40160796..2aa4a9bc904b 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php
@@ -38,7 +38,7 @@ class TwigMarkupInterfaceTest extends KernelTestBase {
   /**
    * Provide test examples.
    */
-  public function providerTestMarkupInterfaceEmpty() {
+  public static function providerTestMarkupInterfaceEmpty() {
     return [
       // The first argument to \Drupal\Core\StringTranslation\TranslatableMarkup
       // is not supposed to be an empty string.
diff --git a/core/tests/Drupal/Tests/Component/Annotation/Doctrine/DocParserTest.php b/core/tests/Drupal/Tests/Component/Annotation/Doctrine/DocParserTest.php
index 14314de2d886..f52b8fb8dce0 100644
--- a/core/tests/Drupal/Tests/Component/Annotation/Doctrine/DocParserTest.php
+++ b/core/tests/Drupal/Tests/Component/Annotation/Doctrine/DocParserTest.php
@@ -398,7 +398,7 @@ DOCBLOCK;
 
     }
 
-    public function getAnnotationVarTypeProviderValid()
+    public static function getAnnotationVarTypeProviderValid()
     {
         //({attribute name}, {attribute value})
          return array(
@@ -451,7 +451,7 @@ DOCBLOCK;
         );
     }
 
-    public function getAnnotationVarTypeProviderInvalid()
+    public static function getAnnotationVarTypeProviderInvalid()
     {
          //({attribute name}, {type declared type}, {attribute value} , {given type or class})
          return array(
@@ -504,7 +504,7 @@ DOCBLOCK;
         );
     }
 
-    public function getAnnotationVarTypeArrayProviderInvalid()
+    public static function getAnnotationVarTypeArrayProviderInvalid()
     {
          //({attribute name}, {type declared type}, {attribute value} , {given type or class})
          return array(
@@ -760,7 +760,7 @@ DOCBLOCK;
         $parser->parse($docblock);
     }
 
-    public function getConstantsProvider()
+    public static function getConstantsProvider()
     {
         $provider[] = array(
             '@AnnotationWithConstants(PHP_EOL)',
diff --git a/core/tests/Drupal/Tests/Component/Assertion/InspectorTest.php b/core/tests/Drupal/Tests/Component/Assertion/InspectorTest.php
index 384bb30ed5d9..eb5772781a38 100644
--- a/core/tests/Drupal/Tests/Component/Assertion/InspectorTest.php
+++ b/core/tests/Drupal/Tests/Component/Assertion/InspectorTest.php
@@ -35,7 +35,7 @@ class InspectorTest extends TestCase {
     $this->assertSame($expected, Inspector::assertAllStrings($input));
   }
 
-  public function providerTestAssertAllStrings() {
+  public static function providerTestAssertAllStrings() {
     $data = [
       'empty-array' => [[], TRUE],
       'array-with-strings' => [['foo', 'bar'], TRUE],
diff --git a/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php b/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php
index 28c91f351c9e..99d0b79bdb42 100644
--- a/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php
+++ b/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php
@@ -317,7 +317,7 @@ class DateTimePlusTest extends TestCase {
    *
    * @see DateTimePlusTest::testDates()
    */
-  public function providerTestDates() {
+  public static function providerTestDates() {
     $dates = [
       // String input.
       // Create date object from datetime string.
@@ -357,7 +357,7 @@ class DateTimePlusTest extends TestCase {
    *
    * @see DateTimePlusTest::testDates()
    */
-  public function providerTestDateArrays() {
+  public static function providerTestDateArrays() {
     $dates = [
       // Array input.
       // Create date object from date array, date only.
@@ -397,7 +397,7 @@ class DateTimePlusTest extends TestCase {
    *
    * @see testDateFormats()
    */
-  public function providerTestDateFormat() {
+  public static function providerTestDateFormat() {
     return [
       // Create a year-only date.
       ['2009', NULL, 'Y', 'Y', '2009'],
@@ -422,7 +422,7 @@ class DateTimePlusTest extends TestCase {
    *
    * @see testInvalidDates
    */
-  public function providerTestInvalidDates() {
+  public static function providerTestInvalidDates() {
     return [
       // Test for invalid month names when we are using a short version
       // of the month.
@@ -449,7 +449,7 @@ class DateTimePlusTest extends TestCase {
    *
    * @see testInvalidDateArrays
    */
-  public function providerTestInvalidDateArrays() {
+  public static function providerTestInvalidDateArrays() {
     return [
       // One year larger than the documented upper limit of checkdate().
       [['year' => 32768, 'month' => 1, 'day' => 8, 'hour' => 8, 'minute' => 0, 'second' => 0], 'America/Chicago', \InvalidArgumentException::class],
@@ -476,7 +476,7 @@ class DateTimePlusTest extends TestCase {
    *
    * @see testCheckArray
    */
-  public function providerTestCheckArray() {
+  public static function providerTestCheckArray() {
     return [
       'Date array, date only' => [['year' => 2010, 'month' => 2, 'day' => 28], TRUE],
       'Date array with hour' => [['year' => 2010, 'month' => 2, 'day' => 28, 'hour' => 10], TRUE],
@@ -502,7 +502,7 @@ class DateTimePlusTest extends TestCase {
    *
    * @see testDateTimezone
    */
-  public function providerTestDateTimezone() {
+  public static function providerTestDateTimezone() {
     // Use a common date for most of the tests.
     $date_string = '2007-01-31 21:00:00';
 
@@ -531,7 +531,7 @@ class DateTimePlusTest extends TestCase {
    *
    * @see testTimestamp()
    */
-  public function providerTestTimestamp() {
+  public static function providerTestTimestamp() {
     return [
       // Create date object from a unix timestamp and display it in
       // local time.
@@ -583,7 +583,7 @@ class DateTimePlusTest extends TestCase {
    *
    * @see testDateTimestamp()
    */
-  public function providerTestDateTimestamp() {
+  public static function providerTestDateTimestamp() {
     return [
       // Create date object from datetime string in UTC, and convert
       // it to a local date.
@@ -652,7 +652,7 @@ class DateTimePlusTest extends TestCase {
    *
    * @see DateTimePlusTest::testDateDiff()
    */
-  public function providerTestDateDiff() {
+  public static function providerTestDateDiff() {
 
     $empty_interval = new \DateInterval('PT0S');
 
@@ -730,7 +730,7 @@ class DateTimePlusTest extends TestCase {
    *
    * @see DateTimePlusTest::testInvalidDateDiff()
    */
-  public function providerTestInvalidDateDiff() {
+  public static function providerTestInvalidDateDiff() {
     return [
       [
         'input1' => DateTimePlus::createFromFormat('U', 3600),
@@ -770,7 +770,7 @@ class DateTimePlusTest extends TestCase {
    * @return array
    *   An array of invalid date/time strings, and corresponding error messages.
    */
-  public function providerTestInvalidConstructor() {
+  public static function providerTestInvalidConstructor() {
     return [
       [
         'YYYY-MM-DD',
diff --git a/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php b/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php
index 6f6281033521..3883c0d945de 100644
--- a/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php
+++ b/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php
@@ -121,7 +121,7 @@ namespace Drupal\Tests\Component\DependencyInjection\Dumper {
      *     - aliases as returned by ContainerBuilder.
      *     - aliases as expected in the container definition.
      */
-    public function getAliasesDataProvider() {
+    public static function getAliasesDataProvider() {
       return [
         [[], []],
         [
@@ -166,7 +166,7 @@ namespace Drupal\Tests\Component\DependencyInjection\Dumper {
      *     - parameters as expected in the container definition.
      *     - frozen value
      */
-    public function getParametersDataProvider() {
+    public static function getParametersDataProvider() {
       return [
         [[], [], TRUE],
         [
@@ -546,7 +546,7 @@ namespace Drupal\Tests\Component\DependencyInjection\Dumper {
       $this->assertEquals(static::serializeDefinition($data), $dump['services']['foo'], 'Expected definition matches dump.');
     }
 
-    public function publicPrivateDataProvider() {
+    public static function publicPrivateDataProvider() {
       return [
         [TRUE],
         [FALSE],
@@ -688,7 +688,7 @@ namespace Drupal\Tests\Component\DependencyInjection\Dumper {
      *     - expected final value.
      *     - escaped value in service definition.
      */
-    public function percentsEscapeProvider() {
+    public static function percentsEscapeProvider() {
       return [
         ['%foo%', '%%foo%%'],
         ['foo%bar%', 'foo%%bar%%'],
diff --git a/core/tests/Drupal/Tests/Component/Diff/DiffFormatterTest.php b/core/tests/Drupal/Tests/Component/Diff/DiffFormatterTest.php
index b0f25967fc70..9016dd483f47 100644
--- a/core/tests/Drupal/Tests/Component/Diff/DiffFormatterTest.php
+++ b/core/tests/Drupal/Tests/Component/Diff/DiffFormatterTest.php
@@ -23,7 +23,7 @@ class DiffFormatterTest extends TestCase {
    *   - First array of text to diff.
    *   - Second array of text to diff.
    */
-  public function provideTestDiff() {
+  public static function provideTestDiff() {
     return [
       'empty' => ['', [], []],
       'add' => [
diff --git a/core/tests/Drupal/Tests/Component/Diff/DiffOpOutputBuilderTest.php b/core/tests/Drupal/Tests/Component/Diff/DiffOpOutputBuilderTest.php
index 6c169fcb6dfc..29143ca9b2b0 100644
--- a/core/tests/Drupal/Tests/Component/Diff/DiffOpOutputBuilderTest.php
+++ b/core/tests/Drupal/Tests/Component/Diff/DiffOpOutputBuilderTest.php
@@ -26,7 +26,7 @@ class DiffOpOutputBuilderTest extends TestCase {
    *   - An array of strings to change from.
    *   - An array of strings to change to.
    */
-  public function provideTestDiff(): array {
+  public static function provideTestDiff(): array {
     return [
       'empty' => [[], [], []],
       'add' => [[new DiffOpAdd(['a'])], [], ['a']],
diff --git a/core/tests/Drupal/Tests/Component/Diff/Engine/DiffEngineTest.php b/core/tests/Drupal/Tests/Component/Diff/Engine/DiffEngineTest.php
index dce6e52b2cb1..231b3c999192 100644
--- a/core/tests/Drupal/Tests/Component/Diff/Engine/DiffEngineTest.php
+++ b/core/tests/Drupal/Tests/Component/Diff/Engine/DiffEngineTest.php
@@ -31,7 +31,7 @@ class DiffEngineTest extends TestCase {
    *   - An array of strings to change from.
    *   - An array of strings to change to.
    */
-  public function provideTestDiff() {
+  public static function provideTestDiff() {
     return [
       'empty' => [[], [], []],
       'add' => [[DiffOpAdd::class], [], ['a']],
diff --git a/core/tests/Drupal/Tests/Component/Diff/Engine/HWLDFWordAccumulatorTest.php b/core/tests/Drupal/Tests/Component/Diff/Engine/HWLDFWordAccumulatorTest.php
index 6364a6143ba8..bcaf935eabdf 100644
--- a/core/tests/Drupal/Tests/Component/Diff/Engine/HWLDFWordAccumulatorTest.php
+++ b/core/tests/Drupal/Tests/Component/Diff/Engine/HWLDFWordAccumulatorTest.php
@@ -36,7 +36,7 @@ class HWLDFWordAccumulatorTest extends TestCase {
    *   - Array of strings for the $words parameter to addWords().
    *   - String tag for the $tag parameter to addWords().
    */
-  public function provideAddWords() {
+  public static function provideAddWords() {
     return [
       [['wordword2'], ['word', 'word2'], 'tag'],
       [['word', 'word2'], ['word', "\nword2"], 'tag'],
diff --git a/core/tests/Drupal/Tests/Component/DrupalComponentTest.php b/core/tests/Drupal/Tests/Component/DrupalComponentTest.php
index 09e356765d34..8291c7464963 100644
--- a/core/tests/Drupal/Tests/Component/DrupalComponentTest.php
+++ b/core/tests/Drupal/Tests/Component/DrupalComponentTest.php
@@ -113,7 +113,7 @@ class DrupalComponentTest extends TestCase {
    *   - TRUE if the test passes, FALSE otherwise.
    *   - File data as a string. This will be used as a virtual file.
    */
-  public function providerAssertNoCoreUsage() {
+  public static function providerAssertNoCoreUsage() {
     return [
       [
         TRUE,
diff --git a/core/tests/Drupal/Tests/Component/FileSystem/RegexDirectoryIteratorTest.php b/core/tests/Drupal/Tests/Component/FileSystem/RegexDirectoryIteratorTest.php
index c340f14630b0..39a5095525b1 100644
--- a/core/tests/Drupal/Tests/Component/FileSystem/RegexDirectoryIteratorTest.php
+++ b/core/tests/Drupal/Tests/Component/FileSystem/RegexDirectoryIteratorTest.php
@@ -33,7 +33,7 @@ class RegexDirectoryIteratorTest extends TestCase {
   /**
    * Provider for self::testRegexDirectoryIterator().
    */
-  public function providerTestRegexDirectoryIterator() {
+  public static function providerTestRegexDirectoryIterator() {
     return [
       [
         [
diff --git a/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php b/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php
index c0ba7cf6ff1a..54d7914475ac 100644
--- a/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php
+++ b/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php
@@ -49,7 +49,7 @@ class PoHeaderTest extends TestCase {
    *   Pairs of plural expressions and expected plural positions keyed by plural
    *   value.
    */
-  public function providerTestPluralsFormula() {
+  public static function providerTestPluralsFormula() {
     return [
       [
         'nplurals=1; plural=0;',
diff --git a/core/tests/Drupal/Tests/Component/Gettext/PoStreamWriterTest.php b/core/tests/Drupal/Tests/Component/Gettext/PoStreamWriterTest.php
index f120955571da..d18888eecddd 100644
--- a/core/tests/Drupal/Tests/Component/Gettext/PoStreamWriterTest.php
+++ b/core/tests/Drupal/Tests/Component/Gettext/PoStreamWriterTest.php
@@ -90,7 +90,7 @@ class PoStreamWriterTest extends TestCase {
    *   - Written content.
    *   - Content longer than 10 bytes.
    */
-  public function providerWriteData() {
+  public static function providerWriteData() {
     // cSpell:disable
     return [
       ['', '', FALSE],
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Context/ContextTest.php b/core/tests/Drupal/Tests/Component/Plugin/Context/ContextTest.php
index e48973a39f65..4a6c28eae119 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Context/ContextTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Context/ContextTest.php
@@ -16,7 +16,7 @@ class ContextTest extends TestCase {
   /**
    * Data provider for testGetContextValue.
    */
-  public function providerGetContextValue() {
+  public static function providerGetContextValue() {
     return [
       ['context_value', 'context_value', FALSE, 'data_type'],
       [NULL, NULL, FALSE, 'data_type'],
@@ -84,7 +84,7 @@ class ContextTest extends TestCase {
   /**
    * Data provider for testHasContextValue.
    */
-  public function providerHasContextValue() {
+  public static function providerHasContextValue() {
     return [
       [TRUE, FALSE],
       [TRUE, 0],
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Discovery/AnnotatedClassDiscoveryTest.php b/core/tests/Drupal/Tests/Component/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
index 28577e83c25e..6b7c905c28f3 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
@@ -24,7 +24,7 @@ class AnnotatedClassDiscoveryTest extends TestCase {
    *
    * @var string[]
    */
-  public function provideBadAnnotations() {
+  public static function provideBadAnnotations() {
     return [
       ['addtogroup'],
       ['code'],
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php
index c6466ba66905..ca63bff0cdad 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php
@@ -22,7 +22,7 @@ class DiscoveryCachedTraitTest extends TestCase {
    *   - Definitions to be returned by getDefinitions().
    *   - Plugin name to query for.
    */
-  public function providerGetDefinition() {
+  public static function providerGetDefinition() {
     return [
       ['definition', [], ['plugin_name' => 'definition'], 'plugin_name'],
       ['definition', ['plugin_name' => 'definition'], [], 'plugin_name'],
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
index b18c95c0c3e7..fce4210daec9 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
@@ -21,7 +21,7 @@ class DiscoveryTraitTest extends TestCase {
    *   - Plugin definition array, to pass to doGetDefinition().
    *   - Plugin ID to get, passed to doGetDefinition().
    */
-  public function providerDoGetDefinition() {
+  public static function providerDoGetDefinition() {
     return [
       ['definition', ['plugin_name' => 'definition'], 'plugin_name'],
       [NULL, ['plugin_name' => 'definition'], 'bad_plugin_name'],
@@ -52,7 +52,7 @@ class DiscoveryTraitTest extends TestCase {
    *   - Plugin definition array, to pass to doGetDefinition().
    *   - Plugin ID to get, passed to doGetDefinition().
    */
-  public function providerDoGetDefinitionException() {
+  public static function providerDoGetDefinitionException() {
     return [
       [FALSE, ['plugin_name' => 'definition'], 'bad_plugin_name'],
     ];
@@ -117,7 +117,7 @@ class DiscoveryTraitTest extends TestCase {
    *   - Expected TRUE or FALSE.
    *   - Plugin ID to look for.
    */
-  public function providerHasDefinition() {
+  public static function providerHasDefinition() {
     return [
       [TRUE, 'valid'],
       [FALSE, 'not_valid'],
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php b/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php
index b05a7be50281..ef640f5dbf72 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php
@@ -44,7 +44,7 @@ class StaticDiscoveryDecoratorTest extends TestCase {
    *   - A plugin definition.
    *   - Base plugin ID.
    */
-  public function providerGetDefinition() {
+  public static function providerGetDefinition() {
     return [
       ['is_defined', TRUE, FALSE, ['plugin-definition' => 'is_defined'], 'plugin-definition'],
       // Make sure we don't call the decorated method if we shouldn't.
@@ -116,7 +116,7 @@ class StaticDiscoveryDecoratorTest extends TestCase {
    *   - bool Whether the test mock has a callback.
    *   - array Plugin definitions.
    */
-  public function providerGetDefinitions() {
+  public static function providerGetDefinitions() {
     return [
       [TRUE, ['definition' => 'is_fake']],
       [FALSE, ['definition' => 'array_of_stuff']],
@@ -181,7 +181,7 @@ class StaticDiscoveryDecoratorTest extends TestCase {
    *   - Array of arguments to pass to the method, with the expectation that our
    *     mocked __call() will return them.
    */
-  public function providerCall() {
+  public static function providerCall() {
     return [
       ['complexArguments', ['1', 2.0, 3, ['4' => 'five']]],
       ['noArguments', []],
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php b/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php
index d4446b188632..ccacab19e64f 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php
@@ -25,7 +25,7 @@ class ReflectionFactoryTest extends TestCase {
    *   - $plugin_definition parameter to getInstanceArguments().
    *   - $configuration parameter to getInstanceArguments().
    */
-  public function providerGetInstanceArguments() {
+  public static function providerGetInstanceArguments() {
     return [
       [
         ['arguments_plugin_id'],
diff --git a/core/tests/Drupal/Tests/Component/Plugin/PluginBaseTest.php b/core/tests/Drupal/Tests/Component/Plugin/PluginBaseTest.php
index f90fd02a9252..e33cf214a759 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/PluginBaseTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/PluginBaseTest.php
@@ -31,7 +31,7 @@ class PluginBaseTest extends TestCase {
    *
    * @return array
    */
-  public function providerTestGetPluginId() {
+  public static function providerTestGetPluginId() {
     return [
       ['base_id', 'base_id'],
       ['base_id:derivative', 'base_id:derivative'],
@@ -58,7 +58,7 @@ class PluginBaseTest extends TestCase {
    *
    * @return array
    */
-  public function providerTestGetBaseId() {
+  public static function providerTestGetBaseId() {
     return [
       ['base_id', 'base_id'],
       ['base_id:derivative', 'base_id'],
@@ -85,7 +85,7 @@ class PluginBaseTest extends TestCase {
    *
    * @return array
    */
-  public function providerTestGetDerivativeId() {
+  public static function providerTestGetDerivativeId() {
     return [
       ['base_id', NULL],
       ['base_id:derivative', 'derivative'],
diff --git a/core/tests/Drupal/Tests/Component/Render/FormattableMarkupTest.php b/core/tests/Drupal/Tests/Component/Render/FormattableMarkupTest.php
index 57a79b185cfe..06a50ebd5bc7 100644
--- a/core/tests/Drupal/Tests/Component/Render/FormattableMarkupTest.php
+++ b/core/tests/Drupal/Tests/Component/Render/FormattableMarkupTest.php
@@ -69,7 +69,7 @@ class FormattableMarkupTest extends TestCase {
    *
    * @return array
    */
-  public function providerTestNullPlaceholder() {
+  public static function providerTestNullPlaceholder() {
     return [
       ['', '@empty', ['@empty' => NULL], 'Deprecated NULL placeholder value for key (@empty) in: "@empty". This will throw a PHP error in drupal:11.0.0. See https://www.drupal.org/node/3318826'],
       ['', ':empty', [':empty' => NULL], 'Deprecated NULL placeholder value for key (:empty) in: ":empty". This will throw a PHP error in drupal:11.0.0. See https://www.drupal.org/node/3318826'],
@@ -117,7 +117,7 @@ class FormattableMarkupTest extends TestCase {
    *
    * @return array
    */
-  public function providerTestUnexpectedPlaceholder() {
+  public static function providerTestUnexpectedPlaceholder() {
     return [
       ['Non alpha, non-allowed starting character: ~placeholder', ['~placeholder' => 'replaced'], E_USER_WARNING, 'Placeholders must begin with one of the following "@", ":" or "%", invalid placeholder (~placeholder) with string: "Non alpha, non-allowed starting character: ~placeholder"'],
       ['Alpha starting character: placeholder', ['placeholder' => 'replaced'], NULL, ''],
diff --git a/core/tests/Drupal/Tests/Component/Serialization/YamlTest.php b/core/tests/Drupal/Tests/Component/Serialization/YamlTest.php
index 473de7a5eb8b..e6ed083aff45 100644
--- a/core/tests/Drupal/Tests/Component/Serialization/YamlTest.php
+++ b/core/tests/Drupal/Tests/Component/Serialization/YamlTest.php
@@ -125,7 +125,7 @@ class YamlTest extends TestCase {
   /**
    * Data provider that lists all YAML files in core.
    */
-  public function providerYamlFilesInCore() {
+  public static function providerYamlFilesInCore() {
     $files = [];
     $dirs = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator(__DIR__ . '/../../../../../', \RecursiveDirectoryIterator::FOLLOW_SYMLINKS));
     foreach ($dirs as $dir) {
diff --git a/core/tests/Drupal/Tests/Component/Transliteration/PhpTransliterationTest.php b/core/tests/Drupal/Tests/Component/Transliteration/PhpTransliterationTest.php
index fa7f8ab14f06..91efbb75866d 100644
--- a/core/tests/Drupal/Tests/Component/Transliteration/PhpTransliterationTest.php
+++ b/core/tests/Drupal/Tests/Component/Transliteration/PhpTransliterationTest.php
@@ -41,7 +41,7 @@ class PhpTransliterationTest extends TestCase {
    *   An array of arrays, each containing the parameters for
    *   self::testRemoveDiacritics().
    */
-  public function providerTestPhpTransliterationRemoveDiacritics() {
+  public static function providerTestPhpTransliterationRemoveDiacritics() {
     // cSpell:disable
     return [
       // Test all characters in the Unicode range 0x00bf to 0x017f.
diff --git a/core/tests/Drupal/Tests/Component/Utility/ArgumentsResolverTest.php b/core/tests/Drupal/Tests/Component/Utility/ArgumentsResolverTest.php
index 5411e6d15a5d..c20e800a7f9d 100644
--- a/core/tests/Drupal/Tests/Component/Utility/ArgumentsResolverTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/ArgumentsResolverTest.php
@@ -33,7 +33,7 @@ class ArgumentsResolverTest extends TestCase {
   /**
    * Provides test data to testGetArgument().
    */
-  public function providerTestGetArgument() {
+  public static function providerTestGetArgument() {
     $data = [];
 
     // Test an optional parameter with no provided value.
@@ -183,7 +183,7 @@ class ArgumentsResolverTest extends TestCase {
   /**
    * Provides test data to testHandleUnresolvedArgument().
    */
-  public function providerTestHandleUnresolvedArgument() {
+  public static function providerTestHandleUnresolvedArgument() {
     $data = [];
     $data[] = [function ($foo) {}];
     $data[] = [[new TestClass(), 'access']];
diff --git a/core/tests/Drupal/Tests/Component/Utility/BytesTest.php b/core/tests/Drupal/Tests/Component/Utility/BytesTest.php
index b9294b6cae36..3ec6e0913163 100644
--- a/core/tests/Drupal/Tests/Component/Utility/BytesTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/BytesTest.php
@@ -44,7 +44,7 @@ class BytesTest extends TestCase {
    *   \Drupal\Component\Utility\Bytes::toNumber(): size, and the expected
    *   return value with the expected type (float).
    */
-  public function providerTestToNumber(): array {
+  public static function providerTestToNumber(): array {
     return [
       ['1', 1.0],
       ['1 byte', 1.0],
@@ -98,7 +98,7 @@ class BytesTest extends TestCase {
    *   \Drupal\Component\Utility\Bytes::validate(): string, and the expected
    *   return value with the expected type (bool).
    */
-  public function providerTestValidate(): array {
+  public static function providerTestValidate(): array {
     return [
       // String not starting with a number.
       ['foo', FALSE],
diff --git a/core/tests/Drupal/Tests/Component/Utility/ColorTest.php b/core/tests/Drupal/Tests/Component/Utility/ColorTest.php
index d3b457e3f20d..3f8983469355 100644
--- a/core/tests/Drupal/Tests/Component/Utility/ColorTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/ColorTest.php
@@ -31,7 +31,7 @@ class ColorTest extends TestCase {
   /**
    * Provides data for testValidateHex().
    */
-  public function providerTestValidateHex() {
+  public static function providerTestValidateHex() {
     return [
       // Tests length.
       [FALSE, ''],
@@ -98,7 +98,7 @@ class ColorTest extends TestCase {
    *     - The rgb color array value.
    *     - (optional) Boolean indicating invalid status. Defaults to FALSE.
    */
-  public function providerTestHexToRgb() {
+  public static function providerTestHexToRgb() {
     $invalid = [];
     // Any invalid arguments should throw an exception.
     foreach (['', '-1', '1', '12', '12345', '1234567', '123456789', '123456789a', 'foo'] as $value) {
@@ -155,7 +155,7 @@ class ColorTest extends TestCase {
    *     - The rgb color array value.
    *     - The hex color value.
    */
-  public function providerTestRbgToHex() {
+  public static function providerTestRbgToHex() {
     // Input using named RGB array (e.g., as returned by Color::hexToRgb()).
     $tests = [
       [['red' => 0, 'green' => 0, 'blue' => 0], '#000000'],
@@ -184,7 +184,7 @@ class ColorTest extends TestCase {
    *     - The hex color value.
    *     - The 6 character length hex color value.
    */
-  public function providerTestNormalizeHexLength() {
+  public static function providerTestNormalizeHexLength() {
     $data = [
       ['#000', '#000000'],
       ['#FFF', '#FFFFFF'],
diff --git a/core/tests/Drupal/Tests/Component/Utility/CryptTest.php b/core/tests/Drupal/Tests/Component/Utility/CryptTest.php
index 8894d9cf21cb..b85bbcf92742 100644
--- a/core/tests/Drupal/Tests/Component/Utility/CryptTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/CryptTest.php
@@ -71,7 +71,7 @@ class CryptTest extends TestCase {
    *
    * @return array Test data.
    */
-  public function providerTestHashBase64() {
+  public static function providerTestHashBase64() {
     return [
       [
         'data' => 'The SHA (Secure Hash Algorithm) is one of a number of cryptographic hash functions. A cryptographic hash is like a signature for a text or a data file. SHA-256 algorithm generates an almost-unique, fixed size 256-bit (32-byte) hash. Hash is a one way function – it cannot be decrypted back. This makes it suitable for password validation, challenge hash authentication, anti-tamper, digital signatures.',
@@ -91,7 +91,7 @@ class CryptTest extends TestCase {
    *
    * @return array Test data.
    */
-  public function providerTestHmacBase64() {
+  public static function providerTestHmacBase64() {
     return [
       [
         'data' => 'Calculates a base-64 encoded, URL-safe sha-256 hmac.',
@@ -107,7 +107,7 @@ class CryptTest extends TestCase {
    *
    * @return array Test data.
    */
-  public function providerTestHmacBase64Invalid() {
+  public static function providerTestHmacBase64Invalid() {
     return [
       [new \stdClass(), new \stdClass()],
       [new \stdClass(), 'string'],
diff --git a/core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php b/core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php
index 10a5c2800a8a..7f0ef7f0c960 100644
--- a/core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php
@@ -45,7 +45,7 @@ class EnvironmentTest extends TestCase {
    *   \Drupal\Component\Utility\Environment::checkMemoryLimit():
    *   required and memory_limit, and the expected return value.
    */
-  public function providerTestCheckMemoryLimit() {
+  public static function providerTestCheckMemoryLimit() {
     return [
       // Minimal amount of memory should be available.
       ['30MB', NULL, TRUE],
diff --git a/core/tests/Drupal/Tests/Component/Utility/HtmlTest.php b/core/tests/Drupal/Tests/Component/Utility/HtmlTest.php
index 32dea1dfa5c7..1f6cadd2bd3d 100644
--- a/core/tests/Drupal/Tests/Component/Utility/HtmlTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/HtmlTest.php
@@ -64,7 +64,7 @@ class HtmlTest extends TestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestCleanCssIdentifier() {
+  public static function providerTestCleanCssIdentifier() {
     $id1 = 'abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMNOPQRSTUVWXYZ-0123456789';
     $id2 = '¡¢£¤¥';
     $id3 = 'css__identifier__with__double__underscores';
@@ -132,7 +132,7 @@ class HtmlTest extends TestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestHtmlGetUniqueId() {
+  public static function providerTestHtmlGetUniqueId() {
     // cSpell:disable
     $id = 'abcdefghijklmnopqrstuvwxyz-0123456789';
     return [
@@ -184,7 +184,7 @@ class HtmlTest extends TestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestHtmlGetUniqueIdWithAjaxIds() {
+  public static function providerTestHtmlGetUniqueIdWithAjaxIds() {
     return [
       ['test-unique-id1--', 'test-unique-id1'],
       // Note, we truncate two hyphens at the end.
@@ -217,7 +217,7 @@ class HtmlTest extends TestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestHtmlGetId() {
+  public static function providerTestHtmlGetId() {
     // cSpell:disable
     $id = 'abcdefghijklmnopqrstuvwxyz-0123456789';
     return [
@@ -249,7 +249,7 @@ class HtmlTest extends TestCase {
    *
    * @see testDecodeEntities()
    */
-  public function providerDecodeEntities() {
+  public static function providerDecodeEntities() {
     return [
       ['Drupal', 'Drupal'],
       ['<script>', '<script>'],
@@ -290,7 +290,7 @@ class HtmlTest extends TestCase {
    *
    * @see testEscape()
    */
-  public function providerEscape() {
+  public static function providerEscape() {
     return [
       ['Drupal', 'Drupal'],
       ['&lt;script&gt;', '<script>'],
@@ -364,7 +364,7 @@ class HtmlTest extends TestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestTransformRootRelativeUrlsToAbsolute() {
+  public static function providerTestTransformRootRelativeUrlsToAbsolute() {
     $data = [];
 
     // Random generator.
@@ -409,7 +409,7 @@ class HtmlTest extends TestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestTransformRootRelativeUrlsToAbsoluteAssertion() {
+  public static function providerTestTransformRootRelativeUrlsToAbsoluteAssertion() {
     return [
       'only relative path' => ['llama'],
       'only root-relative path' => ['/llama'],
diff --git a/core/tests/Drupal/Tests/Component/Utility/ImageTest.php b/core/tests/Drupal/Tests/Component/Utility/ImageTest.php
index 5860e9bea307..c41af3179101 100644
--- a/core/tests/Drupal/Tests/Component/Utility/ImageTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/ImageTest.php
@@ -44,7 +44,7 @@ class ImageTest extends TestCase {
    *
    * @see testScaleDimensions()
    */
-  public function providerTestScaleDimensions() {
+  public static function providerTestScaleDimensions() {
     // Define input / output datasets to test different branch conditions.
     $tests = [];
 
diff --git a/core/tests/Drupal/Tests/Component/Utility/NestedArrayTest.php b/core/tests/Drupal/Tests/Component/Utility/NestedArrayTest.php
index f6f687394823..f1d4436a5cfc 100644
--- a/core/tests/Drupal/Tests/Component/Utility/NestedArrayTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/NestedArrayTest.php
@@ -264,7 +264,7 @@ class NestedArrayTest extends TestCase {
     $this->assertEquals($expected, NestedArray::filter($array, $callable));
   }
 
-  public function providerTestFilter() {
+  public static function providerTestFilter() {
     $data = [];
     $data['1d-array'] = [
       [0, 1, '', TRUE], NULL, [1 => 1, 3 => TRUE],
diff --git a/core/tests/Drupal/Tests/Component/Utility/NumberTest.php b/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
index f719ec07a345..3e06711db903 100644
--- a/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
@@ -145,7 +145,7 @@ class NumberTest extends TestCase {
    *     - The integer value.
    *     - The alphadecimal value.
    */
-  public function providerTestConversions() {
+  public static function providerTestConversions() {
     return [
       [0, '00'],
       [1, '01'],
diff --git a/core/tests/Drupal/Tests/Component/Utility/RectangleTest.php b/core/tests/Drupal/Tests/Component/Utility/RectangleTest.php
index 47d1c0c7a0aa..79d42ff079d9 100644
--- a/core/tests/Drupal/Tests/Component/Utility/RectangleTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/RectangleTest.php
@@ -96,7 +96,7 @@ class RectangleTest extends TestCase {
    *
    * @see testRotateDimensions()
    */
-  public function providerPhp55RotateDimensions() {
+  public static function providerPhp55RotateDimensions() {
     // The dataset is stored in a .json file because it is very large and causes
     // problems for PHPCS.
     return json_decode(file_get_contents(__DIR__ . '/fixtures/RectangleTest.json'));
diff --git a/core/tests/Drupal/Tests/Component/Utility/ReflectionTest.php b/core/tests/Drupal/Tests/Component/Utility/ReflectionTest.php
index f82392b189e2..1b15c34f331c 100644
--- a/core/tests/Drupal/Tests/Component/Utility/ReflectionTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/ReflectionTest.php
@@ -31,7 +31,7 @@ class ReflectionTest extends TestCase {
    *
    * @return array[]
    */
-  public function providerGetParameterClassName() {
+  public static function providerGetParameterClassName() {
     $reflection_method = new \ReflectionMethod(static::class, 'existsForTesting');
     $parameters = $reflection_method->getParameters();
     return [
diff --git a/core/tests/Drupal/Tests/Component/Utility/SortArrayTest.php b/core/tests/Drupal/Tests/Component/Utility/SortArrayTest.php
index 34b191184cdf..f23aaf4bd87e 100644
--- a/core/tests/Drupal/Tests/Component/Utility/SortArrayTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/SortArrayTest.php
@@ -44,7 +44,7 @@ class SortArrayTest extends TestCase {
    *
    * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByWeightElement()
    */
-  public function providerSortByWeightElement() {
+  public static function providerSortByWeightElement() {
     $tests = [];
 
     // Weights set and equal.
@@ -120,7 +120,7 @@ class SortArrayTest extends TestCase {
    *
    * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByWeightProperty()
    */
-  public function providerSortByWeightProperty() {
+  public static function providerSortByWeightProperty() {
     $tests = [];
 
     // Weights set and equal.
@@ -196,7 +196,7 @@ class SortArrayTest extends TestCase {
    *
    * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByTitleElement()
    */
-  public function providerSortByTitleElement() {
+  public static function providerSortByTitleElement() {
     $tests = [];
 
     // Titles set and equal.
@@ -265,7 +265,7 @@ class SortArrayTest extends TestCase {
    *
    * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByTitleProperty()
    */
-  public function providerSortByTitleProperty() {
+  public static function providerSortByTitleProperty() {
     $tests = [];
 
     // Titles set and equal.
diff --git a/core/tests/Drupal/Tests/Component/Utility/UnicodeTest.php b/core/tests/Drupal/Tests/Component/Utility/UnicodeTest.php
index 4c9d301337ff..6dfe031dd123 100644
--- a/core/tests/Drupal/Tests/Component/Utility/UnicodeTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/UnicodeTest.php
@@ -36,7 +36,7 @@ class UnicodeTest extends TestCase {
    * @return array
    *   An array containing a string and its uppercase first version.
    */
-  public function providerUcfirst() {
+  public static function providerUcfirst() {
     // cSpell:disable
     return [
       ['tHe QUIcK bRoWn', 'THe QUIcK bRoWn'],
@@ -67,7 +67,7 @@ class UnicodeTest extends TestCase {
    * @return array
    *   An array containing a string and its lowercase version.
    */
-  public function providerLcfirst() {
+  public static function providerLcfirst() {
     // cSpell:disable
     return [
       ['tHe QUIcK bRoWn', 'tHe QUIcK bRoWn'],
@@ -98,7 +98,7 @@ class UnicodeTest extends TestCase {
    * @return array
    *   An array containing a string and its capitalized version.
    */
-  public function providerUcwords() {
+  public static function providerUcwords() {
     // cSpell:disable
     return [
       ['tHe QUIcK bRoWn', 'THe QUIcK BRoWn'],
@@ -136,7 +136,7 @@ class UnicodeTest extends TestCase {
    *     - (optional) Boolean for the $wordsafe flag. Defaults to FALSE.
    *     - (optional) Boolean for the $add_ellipsis flag. Defaults to FALSE.
    */
-  public function providerTruncate() {
+  public static function providerTruncate() {
     // cSpell:disable
     $tests = [
       ['frànçAIS is über-åwesome', 24, 'frànçAIS is über-åwesome'],
@@ -229,7 +229,7 @@ EOF;
    *   An array of arrays, each containing the parameters to
    *   self::testTruncateBytes().
    */
-  public function providerTestTruncateBytes() {
+  public static function providerTestTruncateBytes() {
     return [
       // String shorter than max length.
       ['Short string', 42, 'Short string'],
@@ -266,7 +266,7 @@ EOF;
    *   An array of arrays, each containing the parameters for
    *   self::testValidateUtf8().
    */
-  public function providerTestValidateUtf8() {
+  public static function providerTestValidateUtf8() {
     return [
       // Empty string.
       ['', TRUE, 'An empty string did not validate.'],
@@ -303,7 +303,7 @@ EOF;
    *   An array of arrays, each containing the parameters to
    *   self::testConvertUtf8().  }
    */
-  public function providerTestConvertToUtf8() {
+  public static function providerTestConvertToUtf8() {
     return [
       [chr(0x97), 'Windows-1252', '—'],
       [chr(0x99), 'Windows-1252', '™'],
diff --git a/core/tests/Drupal/Tests/Component/Utility/UrlHelperTest.php b/core/tests/Drupal/Tests/Component/Utility/UrlHelperTest.php
index da578931b3ec..c21fff98369e 100644
--- a/core/tests/Drupal/Tests/Component/Utility/UrlHelperTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/UrlHelperTest.php
@@ -19,7 +19,7 @@ class UrlHelperTest extends TestCase {
    *
    * @return array
    */
-  public function providerTestBuildQuery() {
+  public static function providerTestBuildQuery() {
     return [
       [['a' => ' &#//+%20@۞'], 'a=%20%26%23//%2B%2520%40%DB%9E', 'Value was properly encoded.'],
       [[' &#//+%20@۞' => 'a'], '%20%26%23%2F%2F%2B%2520%40%DB%9E=a', 'Key was properly encoded.'],
@@ -607,7 +607,7 @@ class UrlHelperTest extends TestCase {
    *
    * @see \Drupal\Tests\Component\Utility\UrlHelperTest::testExternalIsLocal()
    */
-  public function providerTestExternalIsLocal() {
+  public static function providerTestExternalIsLocal() {
     return [
       // Different mixes of trailing slash.
       ['http://example.com', 'http://example.com', TRUE],
@@ -660,7 +660,7 @@ class UrlHelperTest extends TestCase {
    *
    * @see \Drupal\Tests\Component\Utility\UrlHelperTest::testExternalIsLocalInvalid()
    */
-  public function providerTestExternalIsLocalInvalid() {
+  public static function providerTestExternalIsLocalInvalid() {
     return [
       ['http://example.com/foo', ''],
       ['http://example.com/foo', 'bar'],
diff --git a/core/tests/Drupal/Tests/Component/Utility/UserAgentTest.php b/core/tests/Drupal/Tests/Component/Utility/UserAgentTest.php
index d19292c62de6..5a20f8df0790 100644
--- a/core/tests/Drupal/Tests/Component/Utility/UserAgentTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/UserAgentTest.php
@@ -86,7 +86,7 @@ class UserAgentTest extends TestCase {
    *   - An accept-language string.
    *   - Expected best matching language code.
    */
-  public function providerTestGetBestMatchingLangcode() {
+  public static function providerTestGetBestMatchingLangcode() {
     // Random generator.
     $random = new Random();
 
diff --git a/core/tests/Drupal/Tests/Component/Utility/VariableTest.php b/core/tests/Drupal/Tests/Component/Utility/VariableTest.php
index 196f0db029ce..0df91d37e95d 100644
--- a/core/tests/Drupal/Tests/Component/Utility/VariableTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/VariableTest.php
@@ -23,7 +23,7 @@ class VariableTest extends TestCase {
    * @return array[]
    *   Sets of arguments to pass to the test method.
    */
-  public function providerCallableToString(): array {
+  public static function providerCallableToString(): array {
     $mock = VariableTestMock::class;
     return [
       'string' => [
@@ -91,7 +91,7 @@ class VariableTest extends TestCase {
    *     - The expected export string.
    *     - The variable to export.
    */
-  public function providerTestExport() {
+  public static function providerTestExport() {
     return [
       // Array.
       [
diff --git a/core/tests/Drupal/Tests/Component/Utility/XssTest.php b/core/tests/Drupal/Tests/Component/Utility/XssTest.php
index 0f242959ebee..f781306dc83a 100644
--- a/core/tests/Drupal/Tests/Component/Utility/XssTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/XssTest.php
@@ -93,7 +93,7 @@ class XssTest extends TestCase {
    *     - (optional) The allowed HTML tags array that should be passed to
    *       \Drupal\Component\Utility\Xss::filter().
    */
-  public function providerTestFilterXssNormalized() {
+  public static function providerTestFilterXssNormalized() {
     return [
       [
         "Who&#039;s Online",
@@ -160,7 +160,7 @@ class XssTest extends TestCase {
    *     - (optional) The allowed HTML tags array that should be passed to
    *       \Drupal\Component\Utility\Xss::filter().
    */
-  public function providerTestFilterXssNotNormalized() {
+  public static function providerTestFilterXssNotNormalized() {
     $cases = [
       // Tag stripping, different ways to work around removal of HTML tags.
       [
@@ -465,7 +465,7 @@ class XssTest extends TestCase {
    *     - The value to expect after filtering.
    *     - The assertion message.
    */
-  public function providerTestInvalidMultiByte() {
+  public static function providerTestInvalidMultiByte() {
     return [
       ["Foo\xC0barbaz", '', 'Xss::filter() accepted invalid sequence "Foo\xC0barbaz"'],
       ["Fooÿñ", "Fooÿñ", 'Xss::filter() rejects valid sequence Fooÿñ"'],
@@ -495,7 +495,7 @@ class XssTest extends TestCase {
   /**
    * Data provider for testFilterXssAdminNotNormalized().
    */
-  public function providerTestAttributes() {
+  public static function providerTestAttributes() {
     return [
       [
         '<img src="http://example.com/foo.jpg" title="Example: title" alt="Example: alt" class="md:block">',
@@ -601,7 +601,7 @@ class XssTest extends TestCase {
    *     - The value to expect after filtering.
    *     - The assertion message.
    */
-  public function providerTestFilterXssAdminNotNormalized() {
+  public static function providerTestFilterXssAdminNotNormalized() {
     return [
       // DRUPAL-SA-2008-044
       ['<object />', 'object', 'Admin HTML filter -- should not allow object tag.'],
diff --git a/core/tests/Drupal/Tests/Component/Uuid/UuidTest.php b/core/tests/Drupal/Tests/Component/Uuid/UuidTest.php
index 3170d7ce0757..77a5ed1fb96b 100644
--- a/core/tests/Drupal/Tests/Component/Uuid/UuidTest.php
+++ b/core/tests/Drupal/Tests/Component/Uuid/UuidTest.php
@@ -41,7 +41,7 @@ class UuidTest extends TestCase {
    *
    * @return array
    */
-  public function providerUuidInstances() {
+  public static function providerUuidInstances() {
 
     $instances = [];
     $instances[][] = new Php();
@@ -84,7 +84,7 @@ class UuidTest extends TestCase {
    *   - (bool) Whether or not the Uuid is valid.
    *   - Failure message.
    */
-  public function providerTestValidation() {
+  public static function providerTestValidation() {
     return [
       // These valid UUIDs.
       ['6ba7b810-9dad-11d1-80b4-00c04fd430c8', TRUE, 'Basic FQDN UUID did not validate'],
diff --git a/core/tests/Drupal/Tests/Composer/Generator/BuilderTest.php b/core/tests/Drupal/Tests/Composer/Generator/BuilderTest.php
index ca4b9701ef7a..a41153b4ee86 100644
--- a/core/tests/Drupal/Tests/Composer/Generator/BuilderTest.php
+++ b/core/tests/Drupal/Tests/Composer/Generator/BuilderTest.php
@@ -20,7 +20,7 @@ class BuilderTest extends TestCase {
   /**
    * Provides test data for testBuilder.
    */
-  public function builderTestData() {
+  public static function builderTestData() {
     return [
       [
         DrupalCoreRecommendedBuilder::class,
diff --git a/core/tests/Drupal/Tests/Composer/Generator/MetapackageUpdateTest.php b/core/tests/Drupal/Tests/Composer/Generator/MetapackageUpdateTest.php
index 664ffd7a73a9..dcadfe9989c5 100644
--- a/core/tests/Drupal/Tests/Composer/Generator/MetapackageUpdateTest.php
+++ b/core/tests/Drupal/Tests/Composer/Generator/MetapackageUpdateTest.php
@@ -22,7 +22,7 @@ class MetapackageUpdateTest extends TestCase {
   /**
    * Provides test data for testUpdated.
    */
-  public function updatedTestData() {
+  public static function updatedTestData() {
     return [
       [
         DrupalCoreRecommendedBuilder::class,
diff --git a/core/tests/Drupal/Tests/Composer/Generator/OverlapWithTopLevelDependenciesTest.php b/core/tests/Drupal/Tests/Composer/Generator/OverlapWithTopLevelDependenciesTest.php
index 69616f7fa63b..2b0305f98509 100644
--- a/core/tests/Drupal/Tests/Composer/Generator/OverlapWithTopLevelDependenciesTest.php
+++ b/core/tests/Drupal/Tests/Composer/Generator/OverlapWithTopLevelDependenciesTest.php
@@ -16,7 +16,7 @@ class OverlapWithTopLevelDependenciesTest extends TestCase {
   /**
    * Provides data for testOverlapWithTemplateProject().
    */
-  public function templateProjectPathProvider() {
+  public static function templateProjectPathProvider() {
     return [
       [
         'composer/Template/RecommendedProject',
diff --git a/core/tests/Drupal/Tests/Composer/Plugin/ProjectMessage/ConfigTest.php b/core/tests/Drupal/Tests/Composer/Plugin/ProjectMessage/ConfigTest.php
index f1ed74713955..4294472eb537 100644
--- a/core/tests/Drupal/Tests/Composer/Plugin/ProjectMessage/ConfigTest.php
+++ b/core/tests/Drupal/Tests/Composer/Plugin/ProjectMessage/ConfigTest.php
@@ -24,7 +24,7 @@ class ConfigTest extends TestCase {
     ]);
   }
 
-  public function provideGetMessageText() {
+  public static function provideGetMessageText() {
     return [
       [[], []],
       [
diff --git a/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/Functional/ScaffoldTest.php b/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/Functional/ScaffoldTest.php
index 55ecf23c99c0..eeef34bc571d 100644
--- a/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/Functional/ScaffoldTest.php
+++ b/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/Functional/ScaffoldTest.php
@@ -137,7 +137,7 @@ class ScaffoldTest extends TestCase {
   /**
    * Data provider for testScaffoldWithExpectedException.
    */
-  public function scaffoldExpectedExceptionTestValues() {
+  public static function scaffoldExpectedExceptionTestValues() {
     return [
       [
         'drupal-drupal-missing-scaffold-file',
@@ -200,7 +200,7 @@ class ScaffoldTest extends TestCase {
     $this->assertAutoloadFileCorrect($result->docroot());
   }
 
-  public function scaffoldOverridingSettingsExcludingHtaccessValues() {
+  public static function scaffoldOverridingSettingsExcludingHtaccessValues() {
     return [
       [
         'drupal-composer-drupal-project',
diff --git a/core/tests/Drupal/Tests/Composer/Plugin/VendorHardening/VendorHardeningPluginTest.php b/core/tests/Drupal/Tests/Composer/Plugin/VendorHardening/VendorHardeningPluginTest.php
index 0a5fcee9c451..e98ee24373bf 100644
--- a/core/tests/Drupal/Tests/Composer/Plugin/VendorHardening/VendorHardeningPluginTest.php
+++ b/core/tests/Drupal/Tests/Composer/Plugin/VendorHardening/VendorHardeningPluginTest.php
@@ -172,7 +172,7 @@ class VendorHardeningPluginTest extends TestCase {
     $this->assertFileExists($dir . '/web.config');
   }
 
-  public function providerFindBinOverlap() {
+  public static function providerFindBinOverlap() {
     return [
       [
         [],
diff --git a/core/tests/Drupal/Tests/ComposerIntegrationTest.php b/core/tests/Drupal/Tests/ComposerIntegrationTest.php
index dedd18729223..f37883e9ac4c 100644
--- a/core/tests/Drupal/Tests/ComposerIntegrationTest.php
+++ b/core/tests/Drupal/Tests/ComposerIntegrationTest.php
@@ -135,7 +135,7 @@ class ComposerIntegrationTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestExpectedScaffoldFiles() {
+  public static function providerTestExpectedScaffoldFiles() {
     return [
       ['.editorconfig', 'assets/scaffold/files/editorconfig', '[project-root]'],
       ['.gitattributes', 'assets/scaffold/files/gitattributes', '[project-root]'],
diff --git a/core/tests/Drupal/Tests/Core/Access/AccessManagerTest.php b/core/tests/Drupal/Tests/Core/Access/AccessManagerTest.php
index 3b66a4f835ae..8048eebf51e5 100644
--- a/core/tests/Drupal/Tests/Core/Access/AccessManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Access/AccessManagerTest.php
@@ -248,7 +248,7 @@ class AccessManagerTest extends UnitTestCase {
    *
    * @see \Drupal\Tests\Core\Access\AccessManagerTest::testCheckConjunctions()
    */
-  public function providerTestCheckConjunctions() {
+  public static function providerTestCheckConjunctions() {
     $access_allow = AccessResult::allowed();
     $access_deny = AccessResult::neutral();
     $access_kill = AccessResult::forbidden();
@@ -507,7 +507,7 @@ class AccessManagerTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerCheckException() {
+  public static function providerCheckException() {
     return [
       [[1]],
       ['string'],
diff --git a/core/tests/Drupal/Tests/Core/Access/AccessResultTest.php b/core/tests/Drupal/Tests/Core/Access/AccessResultTest.php
index ae25925f2943..f9cd0e838c66 100644
--- a/core/tests/Drupal/Tests/Core/Access/AccessResultTest.php
+++ b/core/tests/Drupal/Tests/Core/Access/AccessResultTest.php
@@ -584,7 +584,7 @@ class AccessResultTest extends UnitTestCase {
    *   does not implement CacheableDependencyInterface, then the result won't
    *   either. This is the case for bullets 3, 6 and 9 in the set above.
    */
-  public function andOrCacheabilityPropagationProvider() {
+  public static function andOrCacheabilityPropagationProvider() {
     // ct: cacheable=true, cf: cacheable=false, un: uncacheable.
     // Note: the test cases that have a "un" access result as the first operand
     // test UncacheableTestAccessResult, not AccessResult. However, we
@@ -940,7 +940,7 @@ class AccessResultTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestAllowedIfHasPermissions() {
+  public static function providerTestAllowedIfHasPermissions() {
     $access_result = AccessResult::allowedIf(FALSE);
     $data[] = [[], 'AND', $access_result];
     $data[] = [[], 'OR', $access_result];
diff --git a/core/tests/Drupal/Tests/Core/Access/CsrfTokenGeneratorTest.php b/core/tests/Drupal/Tests/Core/Access/CsrfTokenGeneratorTest.php
index f81f9960b0dc..ea71f5e23ed2 100644
--- a/core/tests/Drupal/Tests/Core/Access/CsrfTokenGeneratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Access/CsrfTokenGeneratorTest.php
@@ -157,7 +157,7 @@ class CsrfTokenGeneratorTest extends UnitTestCase {
    * @return array
    *   An array of data used by the test.
    */
-  public function providerTestValidateParameterTypes() {
+  public static function providerTestValidateParameterTypes() {
     return [
       [[], ''],
       [TRUE, 'foo'],
@@ -189,7 +189,7 @@ class CsrfTokenGeneratorTest extends UnitTestCase {
    * @return array
    *   An array of data used by the test.
    */
-  public function providerTestInvalidParameterTypes() {
+  public static function providerTestInvalidParameterTypes() {
     return [
       [NULL, new \stdClass()],
       [0, []],
diff --git a/core/tests/Drupal/Tests/Core/Ajax/AjaxCommandsTest.php b/core/tests/Drupal/Tests/Core/Ajax/AjaxCommandsTest.php
index 1f6b02bc188a..8b92157a1113 100644
--- a/core/tests/Drupal/Tests/Core/Ajax/AjaxCommandsTest.php
+++ b/core/tests/Drupal/Tests/Core/Ajax/AjaxCommandsTest.php
@@ -43,7 +43,7 @@ class AjaxCommandsTest extends UnitTestCase {
    *   - Array of css elements
    *   - Expected value
    */
-  public function providerCss() {
+  public static function providerCss() {
     return [
       'empty' => [
         [],
@@ -196,7 +196,7 @@ class AjaxCommandsTest extends UnitTestCase {
   /**
    * Data provider for testAnnounceCommand().
    */
-  public function announceCommandProvider() {
+  public static function announceCommandProvider() {
     return [
       'no priority' => [
         'Things are going to change!',
diff --git a/core/tests/Drupal/Tests/Core/Annotation/PluralTranslationTest.php b/core/tests/Drupal/Tests/Core/Annotation/PluralTranslationTest.php
index 845e624685a9..48ef55692719 100644
--- a/core/tests/Drupal/Tests/Core/Annotation/PluralTranslationTest.php
+++ b/core/tests/Drupal/Tests/Core/Annotation/PluralTranslationTest.php
@@ -58,7 +58,7 @@ class PluralTranslationTest extends UnitTestCase {
     new PluralTranslation($data);
   }
 
-  public function providerTestMissingData() {
+  public static function providerTestMissingData() {
     $data = [];
     $data['all-missing'] = [[]];
     $data['singular-missing'] = [['plural' => 'muh']];
diff --git a/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php b/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php
index 41c53115e997..4546b38a8319 100644
--- a/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/AssetResolverTest.php
@@ -146,7 +146,7 @@ class AssetResolverTest extends UnitTestCase {
     $this->assertCount($expected_cache_item_count * 2, $this->cache->getAllCids());
   }
 
-  public function providerAttachedAssets() {
+  public static function providerAttachedAssets() {
     $time = time();
     return [
       'same libraries, different timestamps' => [
diff --git a/core/tests/Drupal/Tests/Core/Asset/CssCollectionRendererUnitTest.php b/core/tests/Drupal/Tests/Core/Asset/CssCollectionRendererUnitTest.php
index bf3071056b9e..18fb5b7f7128 100644
--- a/core/tests/Drupal/Tests/Core/Asset/CssCollectionRendererUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/CssCollectionRendererUnitTest.php
@@ -80,7 +80,7 @@ class CssCollectionRendererUnitTest extends UnitTestCase {
    *
    * @see testRender
    */
-  public function providerTestRender() {
+  public static function providerTestRender() {
     $create_link_element = function ($href, $media = 'all', $custom_attributes = []) {
       $attributes = [
         'rel' => 'stylesheet',
diff --git a/core/tests/Drupal/Tests/Core/Asset/CssOptimizerUnitTest.php b/core/tests/Drupal/Tests/Core/Asset/CssOptimizerUnitTest.php
index 318f2c62b0e3..2b7033ac8e13 100644
--- a/core/tests/Drupal/Tests/Core/Asset/CssOptimizerUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/CssOptimizerUnitTest.php
@@ -52,7 +52,7 @@ class CssOptimizerUnitTest extends UnitTestCase {
   /**
    * Provides data for the CSS asset optimizing test.
    */
-  public function providerTestOptimize() {
+  public static function providerTestOptimize() {
     $path = 'core/tests/Drupal/Tests/Core/Asset/css_test_files/';
     $absolute_path = dirname(__FILE__) . '/css_test_files/';
     return [
diff --git a/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php b/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php
index d698dcda1706..e1da45e626a2 100644
--- a/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php
@@ -38,7 +38,7 @@ class JsOptimizerUnitTest extends UnitTestCase {
    * @return array
    *   An array of test data.
    */
-  public function providerTestClean() {
+  public static function providerTestClean() {
     $path = dirname(__FILE__) . '/js_test_files/';
     return [
       // File. Tests:
@@ -85,7 +85,7 @@ class JsOptimizerUnitTest extends UnitTestCase {
    * @return array
    *   An array of test data.
    */
-  public function providerTestOptimize() {
+  public static function providerTestOptimize() {
     $path = dirname(__FILE__) . '/js_test_files/';
     return [
       0 => [
diff --git a/core/tests/Drupal/Tests/Core/Asset/LibraryDependencyResolverTest.php b/core/tests/Drupal/Tests/Core/Asset/LibraryDependencyResolverTest.php
index 40327713c063..705461e915e0 100644
--- a/core/tests/Drupal/Tests/Core/Asset/LibraryDependencyResolverTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/LibraryDependencyResolverTest.php
@@ -73,7 +73,7 @@ class LibraryDependencyResolverTest extends UnitTestCase {
   /**
    * Provides test data for ::testGetLibrariesWithDependencies().
    */
-  public function providerTestGetLibrariesWithDependencies() {
+  public static function providerTestGetLibrariesWithDependencies() {
     return [
       // Empty list of libraries.
       [[], []],
@@ -125,7 +125,7 @@ class LibraryDependencyResolverTest extends UnitTestCase {
   /**
    * Provides test data for ::testGetMinimalRepresentativeSubset().
    */
-  public function providerTestGetMinimalRepresentativeSubset() {
+  public static function providerTestGetMinimalRepresentativeSubset() {
     return [
       // Empty list of libraries.
       [[], []],
diff --git a/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryParserTest.php b/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryParserTest.php
index aee09bc92bd1..3724faaf3f0b 100644
--- a/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryParserTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/LibraryDiscoveryParserTest.php
@@ -756,7 +756,7 @@ class LibraryDiscoveryParserTest extends UnitTestCase {
   /**
    * Data provider for testing bad CSS declarations.
    */
-  public function providerTestCssAssert() {
+  public static function providerTestCssAssert() {
     return [
       'css_bad_category' => ['css_bad_category', 'See https://www.drupal.org/node/2274843.'],
       'Improper CSS nesting' => ['css_bad_nesting', 'CSS must be nested under a category. See https://www.drupal.org/node/2274843.'],
diff --git a/core/tests/Drupal/Tests/Core/Authentication/AuthenticationManagerTest.php b/core/tests/Drupal/Tests/Core/Authentication/AuthenticationManagerTest.php
index d67b3309584c..c988388f73d2 100644
--- a/core/tests/Drupal/Tests/Core/Authentication/AuthenticationManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Authentication/AuthenticationManagerTest.php
@@ -64,7 +64,7 @@ class AuthenticationManagerTest extends UnitTestCase {
   /**
    * Provides data to self::testDefaultFilter().
    */
-  public function providerTestDefaultFilter() {
+  public static function providerTestDefaultFilter() {
     $data = [];
     // No route, cookie is global, should apply.
     $data[] = [TRUE, FALSE, [], 'cookie', TRUE];
diff --git a/core/tests/Drupal/Tests/Core/Batch/PercentagesTest.php b/core/tests/Drupal/Tests/Core/Batch/PercentagesTest.php
index 128f4d5da8dc..58009604f43e 100644
--- a/core/tests/Drupal/Tests/Core/Batch/PercentagesTest.php
+++ b/core/tests/Drupal/Tests/Core/Batch/PercentagesTest.php
@@ -32,7 +32,7 @@ class PercentagesTest extends UnitTestCase {
    * @return array
    *   An array of data used by the test.
    */
-  public function providerTestPercentages() {
+  public static function providerTestPercentages() {
     // Set up an array of test cases.
     return [
       // array(total, current, expected).
diff --git a/core/tests/Drupal/Tests/Core/Block/BlockBaseTest.php b/core/tests/Drupal/Tests/Core/Block/BlockBaseTest.php
index 0ac1f6c775cd..5d4d2cbf4e11 100644
--- a/core/tests/Drupal/Tests/Core/Block/BlockBaseTest.php
+++ b/core/tests/Drupal/Tests/Core/Block/BlockBaseTest.php
@@ -47,7 +47,7 @@ class BlockBaseTest extends UnitTestCase {
   /**
    * Provides data for testGetMachineNameSuggestion().
    */
-  public function providerTestGetMachineNameSuggestion() {
+  public static function providerTestGetMachineNameSuggestion() {
     return [
       ['Admin label', 'adminlabel'],
       // cspell:disable-next-line
diff --git a/core/tests/Drupal/Tests/Core/Cache/CacheTest.php b/core/tests/Drupal/Tests/Core/Cache/CacheTest.php
index 71090f46c24d..8d14805b3ca5 100644
--- a/core/tests/Drupal/Tests/Core/Cache/CacheTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/CacheTest.php
@@ -53,7 +53,7 @@ class CacheTest extends UnitTestCase {
    *
    * @return array
    */
-  public function mergeTagsProvider() {
+  public static function mergeTagsProvider() {
     return [
       [[], [], []],
       [['bar', 'foo'], ['bar'], ['foo']],
@@ -80,7 +80,7 @@ class CacheTest extends UnitTestCase {
    *
    * @return array
    */
-  public function mergeMaxAgesProvider() {
+  public static function mergeMaxAgesProvider() {
     return [
       [Cache::PERMANENT, Cache::PERMANENT, Cache::PERMANENT],
       [60, 60, 60],
@@ -119,7 +119,7 @@ class CacheTest extends UnitTestCase {
    *
    * @return array
    */
-  public function mergeCacheContextsProvide() {
+  public static function mergeCacheContextsProvide() {
     return [
       [[], [], []],
       [['foo'], [], ['foo']],
@@ -158,7 +158,7 @@ class CacheTest extends UnitTestCase {
    *
    * @return array
    */
-  public function buildTagsProvider() {
+  public static function buildTagsProvider() {
     return [
       ['node', [1], ['node:1']],
       ['node', [1, 2, 3], ['node:1', 'node:2', 'node:3']],
diff --git a/core/tests/Drupal/Tests/Core/Cache/CacheableMetadataTest.php b/core/tests/Drupal/Tests/Core/Cache/CacheableMetadataTest.php
index d0b4c2f65361..09fb21469a0d 100644
--- a/core/tests/Drupal/Tests/Core/Cache/CacheableMetadataTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/CacheableMetadataTest.php
@@ -68,7 +68,7 @@ class CacheableMetadataTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestMerge() {
+  public static function providerTestMerge() {
     return [
       // All empty.
       [(new CacheableMetadata()), (new CacheableMetadata()), (new CacheableMetadata())],
@@ -122,7 +122,7 @@ class CacheableMetadataTest extends UnitTestCase {
   /**
    * Data provider for testSetCacheMaxAge.
    */
-  public function providerSetCacheMaxAge() {
+  public static function providerSetCacheMaxAge() {
     return [
       [0 , FALSE],
       ['http', TRUE],
@@ -147,7 +147,7 @@ class CacheableMetadataTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestCreateFromRenderArray() {
+  public static function providerTestCreateFromRenderArray() {
     $data = [];
 
     $empty_metadata = new CacheableMetadata();
@@ -183,7 +183,7 @@ class CacheableMetadataTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestCreateFromObject() {
+  public static function providerTestCreateFromObject() {
     $data = [];
 
     $empty_metadata = new CacheableMetadata();
diff --git a/core/tests/Drupal/Tests/Core/Cache/Context/CacheContextsManagerTest.php b/core/tests/Drupal/Tests/Core/Cache/Context/CacheContextsManagerTest.php
index 0ba6ac354b3a..51afa3a9d424 100644
--- a/core/tests/Drupal/Tests/Core/Cache/Context/CacheContextsManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/Context/CacheContextsManagerTest.php
@@ -66,7 +66,7 @@ class CacheContextsManagerTest extends UnitTestCase {
   /**
    * Provides a list of context token sets.
    */
-  public function providerTestOptimizeTokens() {
+  public static function providerTestOptimizeTokens() {
     return [
       [['a', 'x'], ['a', 'x']],
       [['a.b', 'x'], ['a.b', 'x']],
@@ -149,7 +149,7 @@ class CacheContextsManagerTest extends UnitTestCase {
   /**
    * Provides a list of invalid 'baz' cache contexts: the parameter is missing.
    */
-  public function providerTestInvalidCalculatedContext() {
+  public static function providerTestInvalidCalculatedContext() {
     return [
       ['baz'],
       ['baz:'],
@@ -200,7 +200,7 @@ class CacheContextsManagerTest extends UnitTestCase {
    *
    * @return array
    */
-  public function validateTokensProvider() {
+  public static function validateTokensProvider() {
     return [
       [[], FALSE],
       [['foo'], FALSE],
diff --git a/core/tests/Drupal/Tests/Core/Cache/Context/CookieCacheContextTest.php b/core/tests/Drupal/Tests/Core/Cache/Context/CookieCacheContextTest.php
index 3dee9fc94757..8eef5a405063 100644
--- a/core/tests/Drupal/Tests/Core/Cache/Context/CookieCacheContextTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/Context/CookieCacheContextTest.php
@@ -34,7 +34,7 @@ class CookieCacheContextTest extends UnitTestCase {
   /**
    * Provides a list of cookies and expected cache contexts.
    */
-  public function providerTestGetContext() {
+  public static function providerTestGetContext() {
     return [
       [['foo' => 1, 'bar' => 2, 'baz' => 3], 'foo', 1],
       // Context is ordered by cookie name.
diff --git a/core/tests/Drupal/Tests/Core/Cache/Context/HeadersCacheContextTest.php b/core/tests/Drupal/Tests/Core/Cache/Context/HeadersCacheContextTest.php
index 1a946b5760a8..f691ffe9da5a 100644
--- a/core/tests/Drupal/Tests/Core/Cache/Context/HeadersCacheContextTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/Context/HeadersCacheContextTest.php
@@ -34,7 +34,7 @@ class HeadersCacheContextTest extends UnitTestCase {
   /**
    * Provides a list of headers and expected cache contexts.
    */
-  public function providerTestGetContext() {
+  public static function providerTestGetContext() {
     return [
       [[], NULL, ''],
       [[], 'foo', ''],
diff --git a/core/tests/Drupal/Tests/Core/Cache/Context/PathParentCacheContextTest.php b/core/tests/Drupal/Tests/Core/Cache/Context/PathParentCacheContextTest.php
index 440e0e5c07d4..1d5b652ddbcb 100644
--- a/core/tests/Drupal/Tests/Core/Cache/Context/PathParentCacheContextTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/Context/PathParentCacheContextTest.php
@@ -31,7 +31,7 @@ class PathParentCacheContextTest extends UnitTestCase {
   /**
    * Provides a list of paths and expected cache contexts.
    */
-  public function providerTestGetContext() {
+  public static function providerTestGetContext() {
     return [
       ['/some/path', 'some'],
       ['/some/other-path', 'some'],
diff --git a/core/tests/Drupal/Tests/Core/Cache/Context/ProtocolVersionCacheContextTest.php b/core/tests/Drupal/Tests/Core/Cache/Context/ProtocolVersionCacheContextTest.php
index 72f1de4094a1..673cd4cc387f 100644
--- a/core/tests/Drupal/Tests/Core/Cache/Context/ProtocolVersionCacheContextTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/Context/ProtocolVersionCacheContextTest.php
@@ -32,7 +32,7 @@ class ProtocolVersionCacheContextTest extends UnitTestCase {
   /**
    * Provides a list of query arguments and expected cache contexts.
    */
-  public function providerTestGetContext() {
+  public static function providerTestGetContext() {
     return [
       ['HTTP/1.0', 'HTTP/1.0'],
       ['HTTP/1.1', 'HTTP/1.1'],
diff --git a/core/tests/Drupal/Tests/Core/Cache/Context/QueryArgsCacheContextTest.php b/core/tests/Drupal/Tests/Core/Cache/Context/QueryArgsCacheContextTest.php
index ae8009f24f2b..4ed09f3ae4d1 100644
--- a/core/tests/Drupal/Tests/Core/Cache/Context/QueryArgsCacheContextTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/Context/QueryArgsCacheContextTest.php
@@ -31,7 +31,7 @@ class QueryArgsCacheContextTest extends UnitTestCase {
   /**
    * Provides a list of query arguments and expected cache contexts.
    */
-  public function providerTestGetContext() {
+  public static function providerTestGetContext() {
     return [
       [[], NULL, ''],
       [[], 'foo', ''],
diff --git a/core/tests/Drupal/Tests/Core/Cache/DatabaseBackendFactoryTest.php b/core/tests/Drupal/Tests/Core/Cache/DatabaseBackendFactoryTest.php
index d2c3ad1dd545..93666f28daf6 100644
--- a/core/tests/Drupal/Tests/Core/Cache/DatabaseBackendFactoryTest.php
+++ b/core/tests/Drupal/Tests/Core/Cache/DatabaseBackendFactoryTest.php
@@ -37,7 +37,7 @@ class DatabaseBackendFactoryTest extends UnitTestCase {
     $this->assertSame($expected_max_rows_bar, $database_backend_factory->get('bar')->getMaxRows());
   }
 
-  public function getProvider() {
+  public static function getProvider() {
     return [
       'default' => [
         [],
diff --git a/core/tests/Drupal/Tests/Core/Common/AttributesTest.php b/core/tests/Drupal/Tests/Core/Common/AttributesTest.php
index f2fd29e16dc0..49321a4fa2a7 100644
--- a/core/tests/Drupal/Tests/Core/Common/AttributesTest.php
+++ b/core/tests/Drupal/Tests/Core/Common/AttributesTest.php
@@ -19,7 +19,7 @@ class AttributesTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestAttributeData() {
+  public static function providerTestAttributeData() {
     return [
       // Verify that special characters are HTML encoded.
       [['&"\'<>' => 'value'], ' &amp;&quot;&#039;&lt;&gt;="value"', 'HTML encode attribute names.'],
diff --git a/core/tests/Drupal/Tests/Core/Config/ConfigDependencyManagerTest.php b/core/tests/Drupal/Tests/Core/Config/ConfigDependencyManagerTest.php
index 92a6342c262f..a84b4f22bc58 100644
--- a/core/tests/Drupal/Tests/Core/Config/ConfigDependencyManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/ConfigDependencyManagerTest.php
@@ -25,7 +25,7 @@ class ConfigDependencyManagerTest extends UnitTestCase {
     $this->assertEquals($expected_order, $dependency_manager->sortAll());
   }
 
-  public function providerTestSortAll() {
+  public static function providerTestSortAll() {
     $datasets[] = [
       [
         'provider.entity_b' => [],
diff --git a/core/tests/Drupal/Tests/Core/Config/ConfigFactoryOverrideBaseTest.php b/core/tests/Drupal/Tests/Core/Config/ConfigFactoryOverrideBaseTest.php
index d4ba1b1a0636..8a01635b81fe 100644
--- a/core/tests/Drupal/Tests/Core/Config/ConfigFactoryOverrideBaseTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/ConfigFactoryOverrideBaseTest.php
@@ -26,7 +26,7 @@ class ConfigFactoryOverrideBaseTest extends UnitTestCase {
     $this->assertEquals($override_data_after, $override_data_before);
   }
 
-  public function providerTestFilterNestedArray() {
+  public static function providerTestFilterNestedArray() {
     $data = [];
     $data['empty'] = [
       [],
diff --git a/core/tests/Drupal/Tests/Core/Config/ConfigTest.php b/core/tests/Drupal/Tests/Core/Config/ConfigTest.php
index 1bdc3cbd28af..29032f8f54db 100644
--- a/core/tests/Drupal/Tests/Core/Config/ConfigTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/ConfigTest.php
@@ -94,7 +94,7 @@ class ConfigTest extends UnitTestCase {
    *
    * @see \Drupal\Tests\Core\Config\ConfigTest::testSetName()
    */
-  public function setNameProvider() {
+  public static function setNameProvider() {
     return [
       // Valid name with dot.
       [
@@ -400,7 +400,7 @@ class ConfigTest extends UnitTestCase {
    *
    * @see \Drupal\Tests\Core\Config\ConfigTest::testMerge()
    */
-  public function mergeDataProvider() {
+  public static function mergeDataProvider() {
     return [
       [
         // Data.
@@ -435,7 +435,7 @@ class ConfigTest extends UnitTestCase {
    *
    * @see \Drupal\Tests\Core\Config\ConfigTest::testValidateNameException()
    */
-  public function validateNameProvider() {
+  public static function validateNameProvider() {
     $return = [
       // Name missing namespace (dot).
       [
@@ -465,7 +465,7 @@ class ConfigTest extends UnitTestCase {
    * @see \Drupal\Tests\Core\Config\ConfigTest::testOverrideData()
    * @see \Drupal\Tests\Core\Config\ConfigTest::testDelete()
    */
-  public function overrideDataProvider() {
+  public static function overrideDataProvider() {
     $test_cases = [
       [
         // Original data.
@@ -539,7 +539,7 @@ class ConfigTest extends UnitTestCase {
    *
    * @see \Drupal\Tests\Core\Config\ConfigTest::testClear()
    */
-  public function simpleDataProvider() {
+  public static function simpleDataProvider() {
     return [
       [
         [
@@ -560,7 +560,7 @@ class ConfigTest extends UnitTestCase {
    * @see \Drupal\Tests\Core\Config\ConfigTest::testInitWithData()
    * @see \Drupal\Tests\Core\Config\ConfigTest::testNestedClear()
    */
-  public function nestedDataProvider() {
+  public static function nestedDataProvider() {
     return [
       [
         [
diff --git a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php
index 09b47a11c3dc..9b22d95d0b6c 100644
--- a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php
@@ -140,7 +140,7 @@ class ConfigEntityTypeTest extends UnitTestCase {
   /**
    * Provides test data.
    */
-  public function providerTestGetConfigPrefix() {
+  public static function providerTestGetConfigPrefix() {
     return [
       [['provider' => 'node', 'id' => 'node_type', 'config_prefix' => 'type'], 'node.type'],
       [['provider' => 'views', 'id' => 'view'], 'views.view'],
@@ -162,7 +162,7 @@ class ConfigEntityTypeTest extends UnitTestCase {
     $this->assertSame($expected, $properties_to_export);
   }
 
-  public function providerGetPropertiesToExport() {
+  public static function providerGetPropertiesToExport() {
     $data = [];
     $data[] = [
       [
diff --git a/core/tests/Drupal/Tests/Core/Config/ReadOnlyStorageTest.php b/core/tests/Drupal/Tests/Core/Config/ReadOnlyStorageTest.php
index 69855da4c9c3..980d5fd47210 100644
--- a/core/tests/Drupal/Tests/Core/Config/ReadOnlyStorageTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/ReadOnlyStorageTest.php
@@ -67,7 +67,7 @@ class ReadOnlyStorageTest extends UnitTestCase {
    * @return array
    *   The data.
    */
-  public function readMethodsProvider() {
+  public static function readMethodsProvider() {
     $fixture = [
       StorageInterface::DEFAULT_COLLECTION => ['config.a', 'config.b', 'other.a'],
     ];
diff --git a/core/tests/Drupal/Tests/Core/Config/StorageCopyTraitTest.php b/core/tests/Drupal/Tests/Core/Config/StorageCopyTraitTest.php
index 9b13f9328a53..aa30d1028f00 100644
--- a/core/tests/Drupal/Tests/Core/Config/StorageCopyTraitTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/StorageCopyTraitTest.php
@@ -68,7 +68,7 @@ class StorageCopyTraitTest extends UnitTestCase {
   /**
    * Provides data for testCheckRequirements().
    */
-  public function providerTestReplaceStorageContents() {
+  public static function providerTestReplaceStorageContents() {
     $data = [];
     $data[] = [TRUE, TRUE];
     $data[] = [TRUE, FALSE];
diff --git a/core/tests/Drupal/Tests/Core/Controller/ControllerResolverTest.php b/core/tests/Drupal/Tests/Core/Controller/ControllerResolverTest.php
index 2f0335f24229..7ba733c18fa3 100644
--- a/core/tests/Drupal/Tests/Core/Controller/ControllerResolverTest.php
+++ b/core/tests/Drupal/Tests/Core/Controller/ControllerResolverTest.php
@@ -63,7 +63,7 @@ class ControllerResolverTest extends UnitTestCase {
   /**
    * Provides test data for testCreateController().
    */
-  public function providerTestCreateController() {
+  public static function providerTestCreateController() {
     return [
       // Tests class::method.
       ['Drupal\Tests\Core\Controller\MockController::getResult', 'Drupal\Tests\Core\Controller\MockController', 'This is a regular controller.'],
@@ -111,7 +111,7 @@ class ControllerResolverTest extends UnitTestCase {
   /**
    * Provides test data for testGetController().
    */
-  public function providerTestGetController() {
+  public static function providerTestGetController() {
     return [
       // Tests passing a controller via the request.
       [['_controller' => 'Drupal\Tests\Core\Controller\MockContainerAware::getResult'], 'Drupal\Tests\Core\Controller\MockContainerAware', 'This is container aware.'],
@@ -134,7 +134,7 @@ class ControllerResolverTest extends UnitTestCase {
   /**
    * Provides test data for testGetControllerFromDefinition().
    */
-  public function providerTestGetControllerFromDefinition() {
+  public static function providerTestGetControllerFromDefinition() {
     return [
       // Tests a method on an object.
       [[new MockController(), 'getResult'], 'This is a regular controller.'],
diff --git a/core/tests/Drupal/Tests/Core/Cron/CronSuspendQueueDelayTest.php b/core/tests/Drupal/Tests/Core/Cron/CronSuspendQueueDelayTest.php
index 2738682e9954..687e75e154f5 100644
--- a/core/tests/Drupal/Tests/Core/Cron/CronSuspendQueueDelayTest.php
+++ b/core/tests/Drupal/Tests/Core/Cron/CronSuspendQueueDelayTest.php
@@ -285,7 +285,7 @@ final class CronSuspendQueueDelayTest extends UnitTestCase {
    * @return array
    *   Scenarios for testing.
    */
-  public function providerSuspendQueueThreshold(): array {
+  public static function providerSuspendQueueThreshold(): array {
     $scenarios = [];
     $scenarios['cron will wait for the queue, and rerun'] = [
       15.0,
diff --git a/core/tests/Drupal/Tests/Core/CronTest.php b/core/tests/Drupal/Tests/Core/CronTest.php
index 09d3d5325b80..226c3e8cdac2 100644
--- a/core/tests/Drupal/Tests/Core/CronTest.php
+++ b/core/tests/Drupal/Tests/Core/CronTest.php
@@ -172,7 +172,7 @@ class CronTest extends UnitTestCase {
   /**
    * Data provider for ::testProcessQueues() method.
    */
-  public function processQueuesTestData() {
+  public static function processQueuesTestData() {
     return [
       ['Complete', 'assertFalse', 0],
       ['Exception', 'assertTrue', 1],
diff --git a/core/tests/Drupal/Tests/Core/Database/ConditionTest.php b/core/tests/Drupal/Tests/Core/Database/ConditionTest.php
index 4e6908694bc1..0cd5b4fcd3c3 100644
--- a/core/tests/Drupal/Tests/Core/Database/ConditionTest.php
+++ b/core/tests/Drupal/Tests/Core/Database/ConditionTest.php
@@ -27,7 +27,7 @@ class ConditionTest extends UnitTestCase {
    *   - Expected result for the string version of the condition.
    *   - The field name to input in the condition.
    */
-  public function providerSimpleCondition() {
+  public static function providerSimpleCondition() {
     return [
       ['name = :db_condition_placeholder_0', 'name'],
       ['name123 = :db_condition_placeholder_0', 'name-123'],
@@ -113,7 +113,7 @@ class ConditionTest extends UnitTestCase {
    *
    * @return array
    */
-  public function dataProviderTestCompileWithKnownOperators() {
+  public static function dataProviderTestCompileWithKnownOperators() {
     // Below are a list of commented out test cases, which should work but
     // aren't directly supported by core, but instead need manual handling with
     // prefix/suffix at the moment.
@@ -173,7 +173,7 @@ class ConditionTest extends UnitTestCase {
     $condition->compile($connection, $query_placeholder);
   }
 
-  public function providerTestCompileWithSqlInjectionForOperator() {
+  public static function providerTestCompileWithSqlInjectionForOperator() {
     $data = [];
     $data[] = ["IS NOT NULL) ;INSERT INTO {test} (name) VALUES ('test12345678'); -- "];
     $data[] = ["IS NOT NULL) UNION ALL SELECT name, pass FROM {users_field_data} -- "];
diff --git a/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php b/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php
index 2522a8947619..7447460984eb 100644
--- a/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php
+++ b/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php
@@ -28,7 +28,7 @@ class ConnectionTest extends UnitTestCase {
    *   - Arguments to pass to Connection::setPrefix().
    *   - Expected result from Connection::tablePrefix().
    */
-  public function providerPrefixRoundTrip() {
+  public static function providerPrefixRoundTrip() {
     return [
       [
         [
@@ -77,7 +77,7 @@ class ConnectionTest extends UnitTestCase {
    *   - Query to be prefixed.
    *   - Quote identifier.
    */
-  public function providerTestPrefixTables() {
+  public static function providerTestPrefixTables() {
     return [
       [
         'SELECT * FROM test_table',
@@ -126,7 +126,7 @@ class ConnectionTest extends UnitTestCase {
    *   - Namespace.
    *   - Class name without namespace.
    */
-  public function providerGetDriverClass() {
+  public static function providerGetDriverClass() {
     return [
       [
         'nonexistent_class',
@@ -355,7 +355,7 @@ class ConnectionTest extends UnitTestCase {
    *   - Driver for PDO connection.
    *   - Namespace for connection.
    */
-  public function providerSchema() {
+  public static function providerSchema() {
     return [
       [
         'Drupal\\Tests\\Core\\Database\\Stub\\Driver\\Schema',
@@ -385,7 +385,7 @@ class ConnectionTest extends UnitTestCase {
    *   - Expected filtered comment.
    *   - Arguments for Connection::makeComment().
    */
-  public function providerMakeComments() {
+  public static function providerMakeComments() {
     return [
       [
         '/*  */ ',
@@ -421,7 +421,7 @@ class ConnectionTest extends UnitTestCase {
    *   - Expected filtered comment.
    *   - Comment to filter.
    */
-  public function providerFilterComments() {
+  public static function providerFilterComments() {
     return [
       ['', ''],
       ['Exploit  *  / DROP TABLE node. --', 'Exploit * / DROP TABLE node; --'],
@@ -456,7 +456,7 @@ class ConnectionTest extends UnitTestCase {
    *   testEscapeField. The first value is the expected value, and the second
    *   value is the value to test.
    */
-  public function providerEscapeTables() {
+  public static function providerEscapeTables() {
     return [
       ['nocase', 'nocase'],
       ['camelCase', 'camelCase'],
@@ -491,7 +491,7 @@ class ConnectionTest extends UnitTestCase {
    *   - Expected escaped string.
    *   - String to escape.
    */
-  public function providerEscapeAlias() {
+  public static function providerEscapeAlias() {
     return [
       ['!nocase!', 'nocase', ['!', '!']],
       ['`backtick`', 'backtick', ['`', '`']],
@@ -522,7 +522,7 @@ class ConnectionTest extends UnitTestCase {
    *   - Expected escaped string.
    *   - String to escape.
    */
-  public function providerEscapeFields() {
+  public static function providerEscapeFields() {
     return [
       ['/title/', 'title', ['/', '/']],
       ['`backtick`', 'backtick', ['`', '`']],
@@ -556,7 +556,7 @@ class ConnectionTest extends UnitTestCase {
    *   testEscapeField. The first value is the expected value, and the second
    *   value is the value to test.
    */
-  public function providerEscapeDatabase() {
+  public static function providerEscapeDatabase() {
     return [
       ['/name/', 'name', ['/', '/']],
       ['`backtick`', 'backtick', ['`', '`']],
@@ -628,7 +628,7 @@ class ConnectionTest extends UnitTestCase {
    *   - Padded query.
    *   - Query options.
    */
-  public function provideQueriesToTrim() {
+  public static function provideQueriesToTrim() {
     return [
       'remove_non_breaking_space' => [
         'SELECT * FROM test',
@@ -735,7 +735,7 @@ class ConnectionTest extends UnitTestCase {
    *
    * @see ::testFindCallerFromDebugBacktraceWithMockedBacktrace()
    */
-  public function providerMockedBacktrace(): array {
+  public static function providerMockedBacktrace(): array {
     $stack = [
       [
         'file' => '/var/www/core/lib/Drupal/Core/Database/Log.php',
diff --git a/core/tests/Drupal/Tests/Core/Database/DatabaseTest.php b/core/tests/Drupal/Tests/Core/Database/DatabaseTest.php
index 38f518fc9f2c..87a62f9026a2 100644
--- a/core/tests/Drupal/Tests/Core/Database/DatabaseTest.php
+++ b/core/tests/Drupal/Tests/Core/Database/DatabaseTest.php
@@ -88,7 +88,7 @@ class DatabaseTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerFindDriverAutoloadDirectory() {
+  public static function providerFindDriverAutoloadDirectory() {
     return [
       'core mysql' => ['core/modules/mysql/src/Driver/Database/mysql/', 'Drupal\mysql\Driver\Database\mysql', FALSE],
       'D8 custom fake' => [FALSE, 'Drupal\Driver\Database\CoreFake', TRUE],
@@ -113,7 +113,7 @@ class DatabaseTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerFindDriverAutoloadDirectoryException() {
+  public static function providerFindDriverAutoloadDirectoryException() {
     return [
       'test module but tests not included' => [
         "The database_driver Drupal\driver_test\Driver\Database\DrivertestMysql does not exist.",
diff --git a/core/tests/Drupal/Tests/Core/Database/InstallerObjectTest.php b/core/tests/Drupal/Tests/Core/Database/InstallerObjectTest.php
index 460fe1129372..85ee0d5fd7c0 100644
--- a/core/tests/Drupal/Tests/Core/Database/InstallerObjectTest.php
+++ b/core/tests/Drupal/Tests/Core/Database/InstallerObjectTest.php
@@ -59,7 +59,7 @@ class InstallerObjectTest extends UnitTestCase {
    *   - namespace: The namespace providing the driver.
    *   - class: The fully qualified class name of the expected install task.
    */
-  public function providerDbInstallerObject() {
+  public static function providerDbInstallerObject() {
     return [
       // A driver only in the core namespace.
       ['mysql', "Drupal\\mysql\\Driver\\Database\\mysql", MysqlInstallTasks::class],
diff --git a/core/tests/Drupal/Tests/Core/Database/RowCountExceptionTest.php b/core/tests/Drupal/Tests/Core/Database/RowCountExceptionTest.php
index 9610b5249892..aa978be52e60 100644
--- a/core/tests/Drupal/Tests/Core/Database/RowCountExceptionTest.php
+++ b/core/tests/Drupal/Tests/Core/Database/RowCountExceptionTest.php
@@ -24,7 +24,7 @@ class RowCountExceptionTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestExceptionMessage() {
+  public static function providerTestExceptionMessage() {
     return [
       [static::DEFAULT_EXCEPTION_MESSAGE, ''],
       ['test', 'test'],
diff --git a/core/tests/Drupal/Tests/Core/Database/UrlConversionTest.php b/core/tests/Drupal/Tests/Core/Database/UrlConversionTest.php
index 6f87304b590b..c2e8f1352332 100644
--- a/core/tests/Drupal/Tests/Core/Database/UrlConversionTest.php
+++ b/core/tests/Drupal/Tests/Core/Database/UrlConversionTest.php
@@ -41,7 +41,7 @@ class UrlConversionTest extends UnitTestCase {
    *   - url: The full URL string to be tested.
    *   - database_array: An array containing the expected results.
    */
-  public function providerConvertDbUrlToConnectionInfo() {
+  public static function providerConvertDbUrlToConnectionInfo() {
     $root = dirname(__FILE__, 7);
     return [
       'MySql without prefix' => [
@@ -293,7 +293,7 @@ class UrlConversionTest extends UnitTestCase {
    *   - Drupal root string.
    *   - The expected exception message.
    */
-  public function providerInvalidArgumentsUrlConversion() {
+  public static function providerInvalidArgumentsUrlConversion() {
     return [
       ['foo', '', "Missing scheme in URL 'foo'"],
       ['foo', 'bar', "Missing scheme in URL 'foo'"],
@@ -325,7 +325,7 @@ class UrlConversionTest extends UnitTestCase {
    *     database, username, password, prefix, host, port, namespace and driver.
    *   - The expected URL after conversion.
    */
-  public function providerGetConnectionInfoAsUrl() {
+  public static function providerGetConnectionInfoAsUrl() {
     $info1 = [
       'database' => 'test_database',
       'username' => 'test_user',
@@ -477,7 +477,7 @@ class UrlConversionTest extends UnitTestCase {
    *     database, username, password, prefix, host, port, namespace and driver.
    *   - The expected exception message.
    */
-  public function providerInvalidArgumentGetConnectionInfoAsUrl() {
+  public static function providerInvalidArgumentGetConnectionInfoAsUrl() {
     return [
       'Missing database key' => [
         [
diff --git a/core/tests/Drupal/Tests/Core/Datetime/DateHelperTest.php b/core/tests/Drupal/Tests/Core/Datetime/DateHelperTest.php
index e9295ad379bd..41ca72ba1ff7 100644
--- a/core/tests/Drupal/Tests/Core/Datetime/DateHelperTest.php
+++ b/core/tests/Drupal/Tests/Core/Datetime/DateHelperTest.php
@@ -60,7 +60,7 @@ class DateHelperTest extends UnitTestCase {
     $this->assertSame($expected, DateHelper::weekDaysOrdered($weekdays));
   }
 
-  public function providerTestWeekDaysOrdered() {
+  public static function providerTestWeekDaysOrdered() {
     $data = [];
     $data[] = [
       0,
diff --git a/core/tests/Drupal/Tests/Core/Datetime/DateTest.php b/core/tests/Drupal/Tests/Core/Datetime/DateTest.php
index c9010bdcd7c7..39d9c54850f1 100644
--- a/core/tests/Drupal/Tests/Core/Datetime/DateTest.php
+++ b/core/tests/Drupal/Tests/Core/Datetime/DateTest.php
@@ -124,7 +124,7 @@ class DateTest extends UnitTestCase {
   /**
    * Provides some test data for the format interval test.
    */
-  public function providerTestFormatInterval() {
+  public static function providerTestFormatInterval() {
     $data = [
       // Checks for basic seconds.
       [1, 1, '1 sec'],
diff --git a/core/tests/Drupal/Tests/Core/Datetime/DrupalDateTimeTest.php b/core/tests/Drupal/Tests/Core/Datetime/DrupalDateTimeTest.php
index fc0213793f13..53467b6d7895 100644
--- a/core/tests/Drupal/Tests/Core/Datetime/DrupalDateTimeTest.php
+++ b/core/tests/Drupal/Tests/Core/Datetime/DrupalDateTimeTest.php
@@ -62,7 +62,7 @@ class DrupalDateTimeTest extends UnitTestCase {
    *
    * @see DrupalDateTimeTest::testDateDiff()
    */
-  public function providerTestDateDiff() {
+  public static function providerTestDateDiff() {
 
     $settings = ['langcode' => 'en'];
 
@@ -145,7 +145,7 @@ class DrupalDateTimeTest extends UnitTestCase {
    *
    * @see DateTimePlusTest::testInvalidDateDiff()
    */
-  public function providerTestInvalidDateDiff() {
+  public static function providerTestInvalidDateDiff() {
     $settings = ['langcode' => 'en'];
     $utc_tz = new \DateTimeZone('UTC');
     return [
diff --git a/core/tests/Drupal/Tests/Core/DependencyInjection/YamlFileLoaderTest.php b/core/tests/Drupal/Tests/Core/DependencyInjection/YamlFileLoaderTest.php
index 7f55c404fb23..dcf9c974afaa 100644
--- a/core/tests/Drupal/Tests/Core/DependencyInjection/YamlFileLoaderTest.php
+++ b/core/tests/Drupal/Tests/Core/DependencyInjection/YamlFileLoaderTest.php
@@ -80,7 +80,7 @@ YAML;
     $yaml_file_loader->load('vfs://drupal/modules/example/example.yml');
   }
 
-  public function providerTestExceptions() {
+  public static function providerTestExceptions() {
     return [
       '_defaults must be an array' => [<<<YAML
 services:
diff --git a/core/tests/Drupal/Tests/Core/Display/DisplayVariantTest.php b/core/tests/Drupal/Tests/Core/Display/DisplayVariantTest.php
index 71a39d0cfb90..e8555b9bc3f8 100644
--- a/core/tests/Drupal/Tests/Core/Display/DisplayVariantTest.php
+++ b/core/tests/Drupal/Tests/Core/Display/DisplayVariantTest.php
@@ -87,7 +87,7 @@ class DisplayVariantTest extends UnitTestCase {
   /**
    * Provides test data for testGetConfiguration().
    */
-  public function providerTestGetConfiguration() {
+  public static function providerTestGetConfiguration() {
     $data = [];
     $data[] = [
       [],
diff --git a/core/tests/Drupal/Tests/Core/DrupalKernel/DrupalKernelTest.php b/core/tests/Drupal/Tests/Core/DrupalKernel/DrupalKernelTest.php
index 8c86bd922e1b..dee0d58572a0 100644
--- a/core/tests/Drupal/Tests/Core/DrupalKernel/DrupalKernelTest.php
+++ b/core/tests/Drupal/Tests/Core/DrupalKernel/DrupalKernelTest.php
@@ -55,7 +55,7 @@ class DrupalKernelTest extends UnitTestCase {
   /**
    * Provides test data for testTrustedHosts().
    */
-  public function providerTestTrustedHosts() {
+  public static function providerTestTrustedHosts() {
     $data = [];
 
     // Tests canonical URL.
diff --git a/core/tests/Drupal/Tests/Core/DrupalKernel/ValidateHostnameTest.php b/core/tests/Drupal/Tests/Core/DrupalKernel/ValidateHostnameTest.php
index 8e440aefff96..4be76598eeb1 100644
--- a/core/tests/Drupal/Tests/Core/DrupalKernel/ValidateHostnameTest.php
+++ b/core/tests/Drupal/Tests/Core/DrupalKernel/ValidateHostnameTest.php
@@ -28,7 +28,7 @@ class ValidateHostnameTest extends UnitTestCase {
   /**
    * Provides test data for testValidateHostname().
    */
-  public function providerTestValidateHostname() {
+  public static function providerTestValidateHostname() {
     $data = [];
 
     // Verifies that DrupalKernel::validateHostname() prevents invalid
diff --git a/core/tests/Drupal/Tests/Core/Entity/ContentEntityBaseUnitTest.php b/core/tests/Drupal/Tests/Core/Entity/ContentEntityBaseUnitTest.php
index 6d7951bc9743..bb56a7e78bf7 100644
--- a/core/tests/Drupal/Tests/Core/Entity/ContentEntityBaseUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/ContentEntityBaseUnitTest.php
@@ -360,7 +360,7 @@ class ContentEntityBaseUnitTest extends UnitTestCase {
    *   - A bool whether to provide a bundle-specific definition.
    *   - A bool whether to provide an entity type-specific definition.
    */
-  public function providerTestTypedData(): array {
+  public static function providerTestTypedData(): array {
     return [
       'Entity data definition derivative with entity type and bundle' => [
         TRUE,
@@ -534,7 +534,7 @@ class ContentEntityBaseUnitTest extends UnitTestCase {
    *   - Language code for $activeLanguage.
    *   - Fields array for $fields.
    */
-  public function providerGet() {
+  public static function providerGet() {
     return [
       // Populated fields array.
       ['result', 'field_name', 'langcode', ['field_name' => ['langcode' => 'result']]],
@@ -596,7 +596,7 @@ class ContentEntityBaseUnitTest extends UnitTestCase {
    *     Drupal\Core\Field\FieldDefinitionInterface object will be mocked for
    *     each name.
    */
-  public function providerGetFields() {
+  public static function providerGetFields() {
     return [
       [[], FALSE, FALSE, []],
       [['field' => 'field', 'field2' => 'field2'], TRUE, FALSE, ['field', 'field2']],
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityCreateAccessCheckTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityCreateAccessCheckTest.php
index 7e93fa4f70c4..66b4e94d0cdf 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityCreateAccessCheckTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityCreateAccessCheckTest.php
@@ -47,7 +47,7 @@ class EntityCreateAccessCheckTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestAccess() {
+  public static function providerTestAccess() {
     $no_access = FALSE;
     $access = TRUE;
 
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityFieldManagerTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityFieldManagerTest.php
index cf2293b8d3ff..0a8966454081 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityFieldManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityFieldManagerTest.php
@@ -361,7 +361,7 @@ class EntityFieldManagerTest extends UnitTestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestGetBaseFieldDefinitionsTranslatableEntityTypeDefaultLangcode() {
+  public static function providerTestGetBaseFieldDefinitionsTranslatableEntityTypeDefaultLangcode() {
     return [
       ['default_langcode'],
       ['custom_default_langcode_key'],
@@ -405,7 +405,7 @@ class EntityFieldManagerTest extends UnitTestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestGetBaseFieldDefinitionsTranslatableEntityTypeLangcode() {
+  public static function providerTestGetBaseFieldDefinitionsTranslatableEntityTypeLangcode() {
     return [
       [FALSE, TRUE, TRUE],
       [TRUE, FALSE, TRUE],
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityFormTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityFormTest.php
index 3712b7fac625..8e30610eab4c 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityFormTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityFormTest.php
@@ -72,7 +72,7 @@ class EntityFormTest extends UnitTestCase {
   /**
    * Provides test data for testFormId().
    */
-  public function providerTestFormIds() {
+  public static function providerTestFormIds() {
     return [
       [
         'node_article_form',
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityLinkTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityLinkTest.php
index 1398c4503d8d..ab3003c78e1d 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityLinkTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityLinkTest.php
@@ -115,7 +115,7 @@ class EntityLinkTest extends UnitTestCase {
   /**
    * Provides test data for testLink().
    */
-  public function providerTestLink() {
+  public static function providerTestLink() {
     $data = [];
     $data[] = [
       'some_entity_label',
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityResolverManagerTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityResolverManagerTest.php
index cdb68553e454..49ae87a2cf9d 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityResolverManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityResolverManagerTest.php
@@ -86,7 +86,7 @@ class EntityResolverManagerTest extends UnitTestCase {
   /**
    * Data provider for testSetRouteOptionsWithStandardRoute.
    */
-  public function providerTestSetRouteOptionsWithStandardRoute() {
+  public static function providerTestSetRouteOptionsWithStandardRoute() {
     return [
       ['Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerMethod'],
       ['Drupal\Tests\Core\Entity\test_function_controller'],
@@ -116,7 +116,7 @@ class EntityResolverManagerTest extends UnitTestCase {
   /**
    * Data provider for testSetRouteOptionsWithStandardRouteWithArgument.
    */
-  public function providerTestSetRouteOptionsWithStandardRouteWithArgument() {
+  public static function providerTestSetRouteOptionsWithStandardRouteWithArgument() {
     return [
       ['Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerMethodWithArgument'],
       ['Drupal\Tests\Core\Entity\test_function_controller_with_argument'],
@@ -146,7 +146,7 @@ class EntityResolverManagerTest extends UnitTestCase {
   /**
    * Data provider for testSetRouteOptionsWithContentController.
    */
-  public function providerTestSetRouteOptionsWithContentController() {
+  public static function providerTestSetRouteOptionsWithContentController() {
     return [
       ['Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerMethodWithArgument'],
       ['Drupal\Tests\Core\Entity\test_function_controller_with_argument'],
@@ -179,7 +179,7 @@ class EntityResolverManagerTest extends UnitTestCase {
   /**
    * Data provider for testSetRouteOptionsWithEntityTypeNoUpcasting.
    */
-  public function providerTestSetRouteOptionsWithEntityTypeNoUpcasting() {
+  public static function providerTestSetRouteOptionsWithEntityTypeNoUpcasting() {
     return [
       ['Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerWithEntityNoUpcasting'],
       ['Drupal\Tests\Core\Entity\test_function_controller_no_upcasting'],
@@ -213,7 +213,7 @@ class EntityResolverManagerTest extends UnitTestCase {
   /**
    * Data provider for testSetRouteOptionsWithEntityTypeUpcasting.
    */
-  public function providerTestSetRouteOptionsWithEntityTypeUpcasting() {
+  public static function providerTestSetRouteOptionsWithEntityTypeUpcasting() {
     return [
       ['Drupal\Tests\Core\Entity\BasicControllerClass::exampleControllerWithEntityUpcasting'],
       ['Drupal\Tests\Core\Entity\test_function_controller_entity_upcasting'],
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityTypeBundleInfoTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityTypeBundleInfoTest.php
index 6482dd91e2e1..256a06e94488 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityTypeBundleInfoTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityTypeBundleInfoTest.php
@@ -189,7 +189,7 @@ class EntityTypeBundleInfoTest extends UnitTestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestGetBundleInfo() {
+  public static function providerTestGetBundleInfo() {
     return [
       [
         'apple',
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityTypeManagerTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityTypeManagerTest.php
index 9c192c55b558..4e74f0735010 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityTypeManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityTypeManagerTest.php
@@ -157,7 +157,7 @@ class EntityTypeManagerTest extends UnitTestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestHasHandler() {
+  public static function providerTestHasHandler() {
     return [
       ['apple', TRUE],
       ['banana', FALSE],
@@ -288,7 +288,7 @@ class EntityTypeManagerTest extends UnitTestCase {
    * @return array
    *   Test data.
    */
-  public function provideMissingHandlerData() : array {
+  public static function provideMissingHandlerData() : array {
     return [
       'missing_handler' => [
         'test_entity_type',
@@ -391,7 +391,7 @@ class EntityTypeManagerTest extends UnitTestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestGetDefinition() {
+  public static function providerTestGetDefinition() {
     return [
       ['apple', TRUE],
       ['banana', TRUE],
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityTypeTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityTypeTest.php
index 2a2c510d1418..071b5d419126 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityTypeTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityTypeTest.php
@@ -95,7 +95,7 @@ class EntityTypeTest extends UnitTestCase {
   /**
    * Provides test data for testGet.
    */
-  public function providerTestGet() {
+  public static function providerTestGet() {
     return [
       [[], 'provider', NULL],
       [['provider' => ''], 'provider', ''],
@@ -109,7 +109,7 @@ class EntityTypeTest extends UnitTestCase {
   /**
    * Provides test data for testSet.
    */
-  public function providerTestSet() {
+  public static function providerTestSet() {
     return [
       ['provider', NULL],
       ['provider', ''],
@@ -123,7 +123,7 @@ class EntityTypeTest extends UnitTestCase {
   /**
    * Provides test data.
    */
-  public function providerTestGetKeys() {
+  public static function providerTestGetKeys() {
     return [
       [[], ['revision' => '', 'bundle' => '', 'langcode' => '']],
       [['id' => 'id'], ['id' => 'id', 'revision' => '', 'bundle' => '', 'langcode' => '']],
@@ -433,7 +433,7 @@ class EntityTypeTest extends UnitTestCase {
   /**
    * Provides test data for ::testGetBundleLabel().
    */
-  public function providerTestGetBundleLabel() {
+  public static function providerTestGetBundleLabel() {
     return [
       [['label' => 'Entity Label Foo'], 'Entity Label Foo bundle'],
       [['bundle_label' => 'Bundle Label Bar'], 'Bundle Label Bar'],
diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityUrlTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityUrlTest.php
index 8e1bf3b2efaa..85dc0eebdf09 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityUrlTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityUrlTest.php
@@ -189,7 +189,7 @@ class EntityUrlTest extends UnitTestCase {
    * @return array
    *   An array of test cases for testToUrlLinkTemplates().
    */
-  public function providerTestToUrlLinkTemplates() {
+  public static function providerTestToUrlLinkTemplates() {
     $test_cases = [];
 
     $test_cases['canonical'] = ['canonical', 'entity.test_entity.canonical'];
@@ -284,7 +284,7 @@ class EntityUrlTest extends UnitTestCase {
    * @return array
    *   An array of test cases for testToUrlLinkTemplateNoId().
    */
-  public function providerTestToUrlLinkTemplateNoId() {
+  public static function providerTestToUrlLinkTemplateNoId() {
     $test_cases = [];
 
     $test_cases['collection'] = ['collection', 'entity.test_entity.collection'];
@@ -377,7 +377,7 @@ class EntityUrlTest extends UnitTestCase {
    * @return array
    *   An array of test cases for testToUrlUriCallbackUndefined().
    */
-  public function providerTestToUrlUriCallbackUndefined() {
+  public static function providerTestToUrlUriCallbackUndefined() {
     $test_cases = [];
 
     $test_cases['no_callback'] = [[], NULL];
diff --git a/core/tests/Drupal/Tests/Core/Entity/FieldDefinitionTest.php b/core/tests/Drupal/Tests/Core/Entity/FieldDefinitionTest.php
index fd72a312cb31..b7e4ce30f9aa 100644
--- a/core/tests/Drupal/Tests/Core/Entity/FieldDefinitionTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/FieldDefinitionTest.php
@@ -344,7 +344,7 @@ class FieldDefinitionTest extends UnitTestCase {
   /**
    * A data provider for all the types of factories that can create definitions.
    */
-  public function factoryTypeProvider() {
+  public static function factoryTypeProvider() {
     return [
       '::createFromFieldStorageDefinition factory' => [
         'createFromFieldStorageDefinition',
diff --git a/core/tests/Drupal/Tests/Core/Entity/Sql/DefaultTableMappingTest.php b/core/tests/Drupal/Tests/Core/Entity/Sql/DefaultTableMappingTest.php
index cd97ea8b379d..7351ae894391 100644
--- a/core/tests/Drupal/Tests/Core/Entity/Sql/DefaultTableMappingTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/Sql/DefaultTableMappingTest.php
@@ -323,7 +323,7 @@ class DefaultTableMappingTest extends UnitTestCase {
    *   field name, base field status, list of field columns, name of the column
    *   to be retrieved, expected result, whether an exception is expected.
    */
-  public function providerTestGetFieldColumnName() {
+  public static function providerTestGetFieldColumnName() {
     $data = [];
     // Base field with single column.
     $data[] = [TRUE, ['foo'], 'foo', 'test'];
@@ -416,7 +416,7 @@ class DefaultTableMappingTest extends UnitTestCase {
    *   A nested array where each inner array has the following values: a list of
    *   table names and the expected table name.
    */
-  public function providerTestGetFieldTableName() {
+  public static function providerTestGetFieldTableName() {
     $data = [];
 
     $data[] = [['data' => 'data_table', 'base' => 'base_table', 'revision' => 'revision_table'], 'data_table'];
@@ -496,7 +496,7 @@ class DefaultTableMappingTest extends UnitTestCase {
    *   consisting of the entity type ID, field name and a table prefix, followed
    *   by the expected data table name and the revision table name.
    */
-  public function providerTestGetDedicatedTableName() {
+  public static function providerTestGetDedicatedTableName() {
     $data = [];
 
     $data['short entity type; short field name; no prefix'] = [
diff --git a/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageSchemaTest.php b/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageSchemaTest.php
index 3cc96f3ce8b0..66fac780ca45 100644
--- a/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageSchemaTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageSchemaTest.php
@@ -1581,7 +1581,7 @@ class SqlContentEntityStorageSchemaTest extends UnitTestCase {
   /**
    * Provides data for testCastValue().
    */
-  public function providerSchemaCastValue() {
+  public static function providerSchemaCastValue() {
     $cases = [];
     // Tests NULL values.
     $cases[] = [
diff --git a/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageTest.php b/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageTest.php
index 3031589477b2..f4374c2964f4 100644
--- a/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageTest.php
@@ -173,7 +173,7 @@ class SqlContentEntityStorageTest extends UnitTestCase {
    *   value of SqlContentEntityStorage::getBaseTable() as the second
    *   value.
    */
-  public function providerTestGetBaseTable() {
+  public static function providerTestGetBaseTable() {
     return [
       // Test that the entity type's base table is used, if provided.
       ['entity_test', 'entity_test'],
@@ -221,7 +221,7 @@ class SqlContentEntityStorageTest extends UnitTestCase {
    *   return value of SqlContentEntityStorage::getRevisionTable() as the
    *   second value.
    */
-  public function providerTestGetRevisionTable() {
+  public static function providerTestGetRevisionTable() {
     return [
       // Test that the entity type's revision table is used, if provided.
       ['entity_test_revision', 'entity_test_revision'],
@@ -299,7 +299,7 @@ class SqlContentEntityStorageTest extends UnitTestCase {
    *   return value of SqlContentEntityStorage::getRevisionDataTable() as
    *   the second value.
    */
-  public function providerTestGetRevisionDataTable() {
+  public static function providerTestGetRevisionDataTable() {
     return [
       // Test that the entity type's revision data table is used, if provided.
       ['entity_test_field_revision', 'entity_test_field_revision'],
@@ -526,7 +526,7 @@ class SqlContentEntityStorageTest extends UnitTestCase {
    *   A nested array, where each inner array has a single value being a  map of
    *   entity keys to use for the mocked entity type.
    */
-  public function providerTestGetTableMappingSimple() {
+  public static function providerTestGetTableMappingSimple() {
     return [
       [['id' => 'test_id', 'bundle' => NULL, 'uuid' => NULL]],
       [['id' => 'test_id', 'bundle' => 'test_bundle', 'uuid' => NULL]],
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/ActiveLinkResponseFilterTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/ActiveLinkResponseFilterTest.php
index 5657fa656ab8..e25dd83077c9 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/ActiveLinkResponseFilterTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/ActiveLinkResponseFilterTest.php
@@ -35,7 +35,7 @@ class ActiveLinkResponseFilterTest extends UnitTestCase {
    *
    * @see \Drupal\Core\EventSubscriber\ActiveLinkResponseFilter::setLinkActiveClass()
    */
-  public function providerTestSetLinkActiveClass() {
+  public static function providerTestSetLinkActiveClass() {
     // Define all the variations that *don't* affect whether or not an
     // "is-active" class is set, but that should remain unchanged:
     // - surrounding HTML
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/ExceptionJsonSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/ExceptionJsonSubscriberTest.php
index 921d37019044..db86952b9508 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/ExceptionJsonSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/ExceptionJsonSubscriberTest.php
@@ -41,7 +41,7 @@ class ExceptionJsonSubscriberTest extends UnitTestCase {
     $this->assertEquals('application/json', $response->headers->get('Content-Type'));
   }
 
-  public function providerTestOn4xx() {
+  public static function providerTestOn4xx() {
     return [
       'uncacheable exception' => [
         new MethodNotAllowedHttpException(['POST', 'PUT'], 'test message'),
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/ModuleRouteSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/ModuleRouteSubscriberTest.php
index 3b65d4039714..6b9b68be9b78 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/ModuleRouteSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/ModuleRouteSubscriberTest.php
@@ -74,7 +74,7 @@ class ModuleRouteSubscriberTest extends UnitTestCase {
   /**
    * Data provider for testRemoveRoute().
    */
-  public function providerTestRemoveRoute() {
+  public static function providerTestRemoveRoute() {
     return [
       ['enabled', ['_module_dependencies' => 'enabled'], FALSE],
       ['disabled', ['_module_dependencies' => 'disabled'], TRUE],
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/OptionsRequestSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/OptionsRequestSubscriberTest.php
index c186267eece7..23d8fcd1878e 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/OptionsRequestSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/OptionsRequestSubscriberTest.php
@@ -74,7 +74,7 @@ class OptionsRequestSubscriberTest extends UnitTestCase {
     $this->assertEquals($expected_header, $response->headers->get('Allow'));
   }
 
-  public function providerTestOnRequestWithOptionsRequest() {
+  public static function providerTestOnRequestWithOptionsRequest() {
     $data = [];
 
     foreach (['GET', 'POST', 'PATCH', 'PUT', 'DELETE'] as $method) {
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php
index 42921760ed73..641120a531fe 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php
@@ -151,7 +151,7 @@ class RedirectResponseSubscriberTest extends UnitTestCase {
   /**
    * Data provider for testDestinationRedirectToExternalUrl().
    */
-  public function providerTestDestinationRedirectToExternalUrl() {
+  public static function providerTestDestinationRedirectToExternalUrl() {
     return [
       'absolute external url' => [new Request(['destination' => 'http://example.com']), 'http://example.com'],
       'absolute external url with folder' => [new Request(['destination' => 'http://example.com/foobar']), 'http://example.com/foobar'],
@@ -180,7 +180,7 @@ class RedirectResponseSubscriberTest extends UnitTestCase {
   /**
    * Data provider for testDestinationRedirectWithInvalidUrl().
    */
-  public function providerTestDestinationRedirectWithInvalidUrl() {
+  public static function providerTestDestinationRedirectWithInvalidUrl() {
     $data = [];
     $data[] = [new Request(['destination' => '//example:com'])];
     $data[] = [new Request(['destination' => '//example:com/test'])];
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/RssResponseRelativeUrlFilterTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/RssResponseRelativeUrlFilterTest.php
index b97522dee6e7..82961fa886e0 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/RssResponseRelativeUrlFilterTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/RssResponseRelativeUrlFilterTest.php
@@ -17,7 +17,7 @@ use Symfony\Component\HttpKernel\HttpKernelInterface;
  */
 class RssResponseRelativeUrlFilterTest extends UnitTestCase {
 
-  public function providerTestOnResponse() {
+  public static function providerTestOnResponse() {
     $data = [];
 
     $valid_feed = <<<RSS
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php
index 179e09950408..e662533bf1dd 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php
@@ -23,7 +23,7 @@ class SpecialAttributesRouteSubscriberTest extends UnitTestCase {
    * @return array
    *   An array of invalid routes.
    */
-  public function providerTestOnRouteBuildingInvalidVariables() {
+  public static function providerTestOnRouteBuildingInvalidVariables() {
     // Build an array of mock route objects based on paths.
     $routes = [];
     $paths = [
@@ -49,7 +49,7 @@ class SpecialAttributesRouteSubscriberTest extends UnitTestCase {
    * @return array
    *   An array of valid routes.
    */
-  public function providerTestOnRouteBuildingValidVariables() {
+  public static function providerTestOnRouteBuildingValidVariables() {
     // Build an array of mock route objects based on paths.
     $routes = [];
     $paths = [
diff --git a/core/tests/Drupal/Tests/Core/Extension/DatabaseDriverListTest.php b/core/tests/Drupal/Tests/Core/Extension/DatabaseDriverListTest.php
index 7f7c281a096b..4af0786a1ba1 100644
--- a/core/tests/Drupal/Tests/Core/Extension/DatabaseDriverListTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/DatabaseDriverListTest.php
@@ -59,7 +59,7 @@ class DatabaseDriverListTest extends UnitTestCase {
   /**
    * Data provider for testLegacyGetFromDriverName().
    */
-  public function providerDatabaseDrivers(): array {
+  public static function providerDatabaseDrivers(): array {
     return [
       ['mysql', 'mysql', 'Drupal\\mysql\\Driver\\Database\\mysql'],
       ['pgsql', 'pgsql', 'Drupal\\pgsql\\Driver\\Database\\pgsql'],
diff --git a/core/tests/Drupal/Tests/Core/Extension/DependencyTest.php b/core/tests/Drupal/Tests/Core/Extension/DependencyTest.php
index a57cd28156c3..b3f81fd2977f 100644
--- a/core/tests/Drupal/Tests/Core/Extension/DependencyTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/DependencyTest.php
@@ -28,7 +28,7 @@ class DependencyTest extends UnitTestCase {
   /**
    * Data provider for testCreateFromString.
    */
-  public function providerCreateFromString() {
+  public static function providerCreateFromString() {
     $tests = [];
     $tests['module_name_only'] = ['views', 'views', '', ''];
     $tests['module_and_project_names'] = ['drupal:views', 'views', 'drupal', ''];
diff --git a/core/tests/Drupal/Tests/Core/Extension/ExtensionListTest.php b/core/tests/Drupal/Tests/Core/Extension/ExtensionListTest.php
index 3e90d94c93d3..c5f1f4b7f5da 100644
--- a/core/tests/Drupal/Tests/Core/Extension/ExtensionListTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/ExtensionListTest.php
@@ -220,7 +220,7 @@ class ExtensionListTest extends UnitTestCase {
   /**
    * DataProvider for testCheckIncompatibility().
    */
-  public function providerCheckIncompatibility() {
+  public static function providerCheckIncompatibility() {
     return [
       'core_incompatible true' => [
         [
diff --git a/core/tests/Drupal/Tests/Core/Extension/ExtensionVersionTest.php b/core/tests/Drupal/Tests/Core/Extension/ExtensionVersionTest.php
index 06aa51e53fdf..1c6979db0644 100644
--- a/core/tests/Drupal/Tests/Core/Extension/ExtensionVersionTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/ExtensionVersionTest.php
@@ -65,7 +65,7 @@ class ExtensionVersionTest extends UnitTestCase {
    * @return mixed[][]
    *   Arrays of version information.
    */
-  public function providerVersionInfos(): array {
+  public static function providerVersionInfos(): array {
     // Data provider values are:
     // - The version number to test.
     // - Array of expected version information with the following keys:
@@ -263,7 +263,7 @@ class ExtensionVersionTest extends UnitTestCase {
    * @return string[]
    *   The test cases for testInvalidVersionNumber().
    */
-  public function providerInvalidVersionNumber(): array {
+  public static function providerInvalidVersionNumber(): array {
     return static::createKeyedTestCases([
       '',
       '8',
@@ -306,7 +306,7 @@ class ExtensionVersionTest extends UnitTestCase {
    * @return string[]
    *   The test cases for testInvalidVersionCorePrefix().
    */
-  public function providerInvalidVersionCorePrefix(): array {
+  public static function providerInvalidVersionCorePrefix(): array {
     return static::createKeyedTestCases([
       '6.x-1.0',
       '7.x-1.x',
@@ -335,7 +335,7 @@ class ExtensionVersionTest extends UnitTestCase {
    * @return string[]
    *   The test cases for testInvalidBranchCorePrefix().
    */
-  public function providerInvalidBranchCorePrefix(): array {
+  public static function providerInvalidBranchCorePrefix(): array {
     return static::createKeyedTestCases([
       '6.x-1.',
       '7.x-1.',
@@ -368,7 +368,7 @@ class ExtensionVersionTest extends UnitTestCase {
    * @return string[][]
    *   The test cases for testCreateFromSupportBranch().
    */
-  public function providerCreateFromSupportBranch(): array {
+  public static function providerCreateFromSupportBranch(): array {
     // Data provider values are:
     // - The version number to test.
     // - Array of expected version information with the following keys:
@@ -418,7 +418,7 @@ class ExtensionVersionTest extends UnitTestCase {
    * @return string[]
    *   The test cases for testInvalidBranch().
    */
-  public function provideInvalidBranch(): array {
+  public static function provideInvalidBranch(): array {
     return self::createKeyedTestCases([
       '8.x-1.0',
       '8.x-2.x',
diff --git a/core/tests/Drupal/Tests/Core/Extension/InfoParserUnitTest.php b/core/tests/Drupal/Tests/Core/Extension/InfoParserUnitTest.php
index bf70c5522d47..4e70611ee378 100644
--- a/core/tests/Drupal/Tests/Core/Extension/InfoParserUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/InfoParserUnitTest.php
@@ -298,7 +298,7 @@ CORE_INCOMPATIBILITY;
   /**
    * Data provider for testCoreIncompatibility().
    */
-  public function providerCoreIncompatibility() {
+  public static function providerCoreIncompatibility() {
     // Remove possible stability suffix to properly parse 11.0-dev.
     $version = preg_replace('/-dev$/', '', \Drupal::VERSION);
     [$major, $minor] = explode('.', $version, 2);
@@ -412,7 +412,7 @@ INFO;
   /**
    * Data provider for testValidLifecycle().
    */
-  public function providerValidLifecycle() {
+  public static function providerValidLifecycle() {
     return [
       'empty' => [
         '',
@@ -469,7 +469,7 @@ INFO;
   /**
    * Data provider for testInvalidLifecycle().
    */
-  public function providerInvalidLifecycle() {
+  public static function providerInvalidLifecycle() {
     return [
       'bogus' => [
         'bogus',
@@ -527,7 +527,7 @@ INFO;
   /**
    * Data provider for testLifecycleLink().
    */
-  public function providerLifecycleLink() {
+  public static function providerLifecycleLink() {
     return [
       'valid deprecated' => [
         ExtensionLifecycle::DEPRECATED,
diff --git a/core/tests/Drupal/Tests/Core/Extension/ThemeExtensionListTest.php b/core/tests/Drupal/Tests/Core/Extension/ThemeExtensionListTest.php
index 19a9d2aabb51..0f112489526b 100644
--- a/core/tests/Drupal/Tests/Core/Extension/ThemeExtensionListTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/ThemeExtensionListTest.php
@@ -137,7 +137,7 @@ class ThemeExtensionListTest extends UnitTestCase {
    * @return array
    *   An array of theme test data.
    */
-  public function providerTestGetBaseThemes() {
+  public static function providerTestGetBaseThemes() {
     $data = [];
 
     // Tests a theme without any base theme.
diff --git a/core/tests/Drupal/Tests/Core/Field/FieldInputValueNormalizerTraitTest.php b/core/tests/Drupal/Tests/Core/Field/FieldInputValueNormalizerTraitTest.php
index 1fa81d6bfb60..b846f9686c9c 100644
--- a/core/tests/Drupal/Tests/Core/Field/FieldInputValueNormalizerTraitTest.php
+++ b/core/tests/Drupal/Tests/Core/Field/FieldInputValueNormalizerTraitTest.php
@@ -26,7 +26,7 @@ class FieldInputValueNormalizerTraitTest extends UnitTestCase {
   /**
    * Provides test cases for ::testKeyValueByDelta.
    */
-  public function keyValueByDeltaTestCases() {
+  public static function keyValueByDeltaTestCases() {
     return [
       'Integer' => [
         1,
diff --git a/core/tests/Drupal/Tests/Core/Field/StringItemTest.php b/core/tests/Drupal/Tests/Core/Field/StringItemTest.php
index b3b6cc0aac38..4906337617c0 100644
--- a/core/tests/Drupal/Tests/Core/Field/StringItemTest.php
+++ b/core/tests/Drupal/Tests/Core/Field/StringItemTest.php
@@ -52,7 +52,7 @@ class StringItemTest extends UnitTestCase {
    * @return array
    *   Test cases.
    */
-  public function providerMaxLength(): array {
+  public static function providerMaxLength(): array {
     return [
       '32' => [32],
       '255' => [255],
diff --git a/core/tests/Drupal/Tests/Core/Field/UriItemTest.php b/core/tests/Drupal/Tests/Core/Field/UriItemTest.php
index 92d88b7ea985..a8fc6710c245 100644
--- a/core/tests/Drupal/Tests/Core/Field/UriItemTest.php
+++ b/core/tests/Drupal/Tests/Core/Field/UriItemTest.php
@@ -42,7 +42,7 @@ class UriItemTest extends UnitTestCase {
    * @return array
    *   Test cases.
    */
-  public function providerMaxLength(): array {
+  public static function providerMaxLength(): array {
     return [
       '32' => [32],
       '255' => [255],
diff --git a/core/tests/Drupal/Tests/Core/File/FileSystemTest.php b/core/tests/Drupal/Tests/Core/File/FileSystemTest.php
index f8a3a402a22e..4794b5fe44b7 100644
--- a/core/tests/Drupal/Tests/Core/File/FileSystemTest.php
+++ b/core/tests/Drupal/Tests/Core/File/FileSystemTest.php
@@ -113,7 +113,7 @@ class FileSystemTest extends UnitTestCase {
     $this->assertSame($expected, $this->fileSystem->basename($uri, $suffix));
   }
 
-  public function providerTestBasename() {
+  public static function providerTestBasename() {
     $data = [];
     $data[] = [
       'public://nested/dir',
diff --git a/core/tests/Drupal/Tests/Core/File/FileUploadSanitizeNameEventTest.php b/core/tests/Drupal/Tests/Core/File/FileUploadSanitizeNameEventTest.php
index c1cf737df9e2..17e7bbe1f5b4 100644
--- a/core/tests/Drupal/Tests/Core/File/FileUploadSanitizeNameEventTest.php
+++ b/core/tests/Drupal/Tests/Core/File/FileUploadSanitizeNameEventTest.php
@@ -81,7 +81,7 @@ class FileUploadSanitizeNameEventTest extends UnitTestCase {
    * @return array
    *   Arrays with original file name.
    */
-  public function provideFilenames() {
+  public static function provideFilenames() {
     return [
       'ASCII filename with extension' => [
         'example.txt',
diff --git a/core/tests/Drupal/Tests/Core/Form/ConfigTargetTest.php b/core/tests/Drupal/Tests/Core/Form/ConfigTargetTest.php
index 09e272230efc..ba24a8515410 100644
--- a/core/tests/Drupal/Tests/Core/Form/ConfigTargetTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/ConfigTargetTest.php
@@ -97,7 +97,7 @@ class ConfigTargetTest extends UnitTestCase {
     $this->assertSame($expected, $form_state->isCached());
   }
 
-  public function providerTestFormCacheable(): array {
+  public static function providerTestFormCacheable(): array {
     $closure = fn (bool $something): string => $something ? 'Yes' : 'No';
     return [
       'No callables' => [TRUE, NULL, NULL],
@@ -164,7 +164,7 @@ class ConfigTargetTest extends UnitTestCase {
     ConfigTarget::fromForm($array_parents, $form);
   }
 
-  public function providerTestFromFormException(): array {
+  public static function providerTestFromFormException(): array {
     return [
       'No #config_target' => [
         [
@@ -215,7 +215,7 @@ class ConfigTargetTest extends UnitTestCase {
     new ConfigTarget(...$arguments);
   }
 
-  public function providerMultiTargetWithoutCallables(): \Generator {
+  public static function providerMultiTargetWithoutCallables(): \Generator {
     yield "neither callable" => ['foo.settings', ['a', 'b']];
     yield "only fromConfig" => ['foo.settings', ['a', 'b'], "intval"];
     yield "only toConfig" => ['foo.settings', ['a', 'b'], NULL, "intval"];
diff --git a/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php b/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php
index cec16f9e06b4..c6934668b31e 100644
--- a/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php
@@ -119,7 +119,7 @@ class ConfirmFormHelperTest extends UnitTestCase {
   /**
    * Provides test data for testCancelLinkDestination().
    */
-  public function providerTestCancelLinkDestination() {
+  public static function providerTestCancelLinkDestination() {
     $data = [];
     $data[] = ['baz'];
     $data[] = ['/baz'];
diff --git a/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php b/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
index fe5f2c4d4570..d732a212b8b7 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
@@ -175,7 +175,7 @@ class FormBuilderTest extends FormTestBase {
   /**
    * Provides test data for testHandleFormStateResponse().
    */
-  public function formStateResponseProvider() {
+  public static function formStateResponseProvider() {
     return [
       ['Symfony\Component\HttpFoundation\Response', 'response'],
       ['Symfony\Component\HttpFoundation\RedirectResponse', 'redirect'],
@@ -335,7 +335,7 @@ class FormBuilderTest extends FormTestBase {
   /**
    * Data provider for ::testBuildFormWithTriggeringElement().
    */
-  public function providerTestBuildFormWithTriggeringElement() {
+  public static function providerTestBuildFormWithTriggeringElement() {
     $plain_text = 'Other submit value';
     $markup = 'Other submit <input> value';
     return [
@@ -649,7 +649,7 @@ class FormBuilderTest extends FormTestBase {
    *
    * @return array
    */
-  public function providerTestChildAccessInheritance() {
+  public static function providerTestChildAccessInheritance() {
     $data = [];
 
     $element = [
@@ -789,7 +789,7 @@ class FormBuilderTest extends FormTestBase {
     $this->assertSame($expected, $is_safe);
   }
 
-  public function providerTestValueCallableIsSafe() {
+  public static function providerTestValueCallableIsSafe() {
     $data = [];
     $data['string_no_slash'] = [
       'Drupal\Core\Render\Element\Token::valueCallback',
@@ -866,7 +866,7 @@ class FormBuilderTest extends FormTestBase {
     }
   }
 
-  public function providerTestInvalidToken() {
+  public static function providerTestInvalidToken() {
     $data = [];
     $data['authenticated_invalid'] = [TRUE, FALSE, TRUE];
     $data['authenticated_valid'] = [FALSE, TRUE, TRUE];
@@ -926,7 +926,7 @@ class FormBuilderTest extends FormTestBase {
    *
    * @return array
    */
-  public function providerTestFormTokenCacheability() {
+  public static function providerTestFormTokenCacheability() {
     return [
       'token:none,authenticated:true' => [NULL, TRUE, ['contexts' => ['user.roles:authenticated']], ['max-age' => 0], 'post'],
       'token:none,authenticated:false' => [NULL, FALSE, ['contexts' => ['user.roles:authenticated']], NULL, 'post'],
diff --git a/core/tests/Drupal/Tests/Core/Form/FormElementHelperTest.php b/core/tests/Drupal/Tests/Core/Form/FormElementHelperTest.php
index 03f09b904116..7eedb6d440b8 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormElementHelperTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormElementHelperTest.php
@@ -31,7 +31,7 @@ class FormElementHelperTest extends UnitTestCase {
   /**
    * Provides test data.
    */
-  public function getElementByNameProvider() {
+  public static function getElementByNameProvider() {
     $data = [];
     $data[] = ['id', [], []];
     $data[] = [
@@ -117,7 +117,7 @@ class FormElementHelperTest extends UnitTestCase {
   /**
    * Provides test data.
    */
-  public function getElementTitleProvider() {
+  public static function getElementTitleProvider() {
     $data = [];
     $data[] = ['id', [], ''];
     $data[] = [
diff --git a/core/tests/Drupal/Tests/Core/Form/FormHelperTest.php b/core/tests/Drupal/Tests/Core/Form/FormHelperTest.php
index c29ebef96e8e..e39c3973a32a 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormHelperTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormHelperTest.php
@@ -99,7 +99,7 @@ class FormHelperTest extends UnitTestCase {
   /**
    * Provides a list of elements to test.
    */
-  public function providerElements() {
+  public static function providerElements() {
     return [
       [
         [
diff --git a/core/tests/Drupal/Tests/Core/Form/FormStateDecoratorBaseTest.php b/core/tests/Drupal/Tests/Core/Form/FormStateDecoratorBaseTest.php
index b81d1ea6b4b0..6c877b5406d1 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormStateDecoratorBaseTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormStateDecoratorBaseTest.php
@@ -48,7 +48,7 @@ class FormStateDecoratorBaseTest extends UnitTestCase {
   /**
    * Provides data to test methods that take a single boolean argument.
    */
-  public function providerSingleBooleanArgument() {
+  public static function providerSingleBooleanArgument() {
     return [
       [TRUE],
       [FALSE],
@@ -283,7 +283,7 @@ class FormStateDecoratorBaseTest extends UnitTestCase {
   /**
    * Provides data to self::testGetLimitValidationErrors() and self::testGetLimitValidationErrors().
    */
-  public function providerLimitValidationErrors() {
+  public static function providerLimitValidationErrors() {
     return [
       [NULL],
       [
@@ -322,7 +322,7 @@ class FormStateDecoratorBaseTest extends UnitTestCase {
   /**
    * Provides data to self::testIsMethodType().
    */
-  public function providerIsMethodType() {
+  public static function providerIsMethodType() {
     return [
       [TRUE, 'GET'],
       [TRUE, 'POST'],
@@ -346,7 +346,7 @@ class FormStateDecoratorBaseTest extends UnitTestCase {
   /**
    * Provides data to self::testSetMethod().
    */
-  public function providerSetRequestMethod() {
+  public static function providerSetRequestMethod() {
     return [
       ['GET'],
       ['POST'],
@@ -662,7 +662,7 @@ class FormStateDecoratorBaseTest extends UnitTestCase {
   /**
    * Provides data to self::testSetTemporaryValue().
    */
-  public function providerSetTemporaryValue() {
+  public static function providerSetTemporaryValue() {
     return [
       ['FOO', 'BAR'],
       ['FOO', NULL],
@@ -700,7 +700,7 @@ class FormStateDecoratorBaseTest extends UnitTestCase {
   /**
    * Provides data to self::testGetTemporaryValue().
    */
-  public function providerGetTemporaryValue() {
+  public static function providerGetTemporaryValue() {
     return [
       [TRUE, 'FOO', 'BAR'],
       [TRUE, 'FOO', NULL],
@@ -732,7 +732,7 @@ class FormStateDecoratorBaseTest extends UnitTestCase {
   /**
    * Provides data to self::testHasTemporaryValue().
    */
-  public function providerHasTemporaryValue() {
+  public static function providerHasTemporaryValue() {
     return [
       [TRUE, 'FOO'],
       [FALSE, 'FOO'],
@@ -866,7 +866,7 @@ class FormStateDecoratorBaseTest extends UnitTestCase {
   /**
    * Provides data to self::testLoadInclude().
    */
-  public function providerLoadInclude() {
+  public static function providerLoadInclude() {
     return [
       // Existing files.
       [__FILE__, 'foo', 'inc', 'foo'],
@@ -1298,7 +1298,7 @@ class FormStateDecoratorBaseTest extends UnitTestCase {
   /**
    * Provides data to self::testGetRedirect().
    */
-  public function providerGetRedirect() {
+  public static function providerGetRedirect() {
     return [
       [NULL],
       [FALSE],
diff --git a/core/tests/Drupal/Tests/Core/Form/FormStateTest.php b/core/tests/Drupal/Tests/Core/Form/FormStateTest.php
index f8fb239b12e3..3aadbc411d43 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormStateTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormStateTest.php
@@ -37,7 +37,7 @@ class FormStateTest extends UnitTestCase {
    * @return array
    *   Returns some test data.
    */
-  public function providerTestGetRedirect() {
+  public static function providerTestGetRedirect() {
     $data = [];
     $data[] = [[], NULL];
 
@@ -80,7 +80,7 @@ class FormStateTest extends UnitTestCase {
     $this->assertSame($error, $form_state->getError($element));
   }
 
-  public function providerTestGetError() {
+  public static function providerTestGetError() {
     return [
       [[], ['foo']],
       [['foo][bar' => 'Fail'], []],
@@ -113,7 +113,7 @@ class FormStateTest extends UnitTestCase {
     $this->assertSame($expected_errors, $form_state->getErrors());
   }
 
-  public function providerTestSetErrorByName() {
+  public static function providerTestSetErrorByName() {
     return [
       // Only validate the 'options' element.
       [[['options']], ['options' => '']],
@@ -264,7 +264,7 @@ class FormStateTest extends UnitTestCase {
   /**
    * Provides test data for testIsCached().
    */
-  public function providerTestIsCached() {
+  public static function providerTestIsCached() {
     $data = [];
     $data[] = [
       TRUE,
@@ -335,7 +335,7 @@ class FormStateTest extends UnitTestCase {
   /**
    * Provides test data for testIsMethodType().
    */
-  public function providerTestIsMethodType() {
+  public static function providerTestIsMethodType() {
     $data = [];
     $data[] = [
       'get',
diff --git a/core/tests/Drupal/Tests/Core/Form/FormStateValuesTraitTest.php b/core/tests/Drupal/Tests/Core/Form/FormStateValuesTraitTest.php
index 389955669382..1b931f3027d5 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormStateValuesTraitTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormStateValuesTraitTest.php
@@ -62,7 +62,7 @@ class FormStateValuesTraitTest extends UnitTestCase {
    *   - The expected value (mixed).
    *   - The default value (mixed).
    */
-  public function providerGetValue() {
+  public static function providerGetValue() {
     $data = [];
     $data[] = [
       'foo', 'one',
@@ -130,7 +130,7 @@ class FormStateValuesTraitTest extends UnitTestCase {
    *   - The new value to set (mixed).
    *   - The expected form state values after setting the new value (mixed[]).
    */
-  public function providerSetValue() {
+  public static function providerSetValue() {
     $data = [];
     $data[] = [
       'foo', 'one', ['bar' => 'wrong', 'foo' => 'one'],
@@ -170,7 +170,7 @@ class FormStateValuesTraitTest extends UnitTestCase {
    *   - The key to check for in the form state (string)
    *   - Whether the form state has an item with that key (bool).
    */
-  public function providerHasValue() {
+  public static function providerHasValue() {
     $data = [];
     $data[] = [
       'foo', TRUE,
@@ -219,7 +219,7 @@ class FormStateValuesTraitTest extends UnitTestCase {
    *   - The key to check for in the form state (string)
    *   - Whether the value is empty or not (bool).
    */
-  public function providerIsValueEmpty() {
+  public static function providerIsValueEmpty() {
     $data = [];
     $data[] = [
       'foo', FALSE,
diff --git a/core/tests/Drupal/Tests/Core/Form/FormSubmitterTest.php b/core/tests/Drupal/Tests/Core/Form/FormSubmitterTest.php
index e5fa53b2d34b..83dbfec7378a 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormSubmitterTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormSubmitterTest.php
@@ -105,7 +105,7 @@ class FormSubmitterTest extends UnitTestCase {
     $this->assertInstanceOf('Symfony\Component\HttpFoundation\Response', $return);
   }
 
-  public function providerTestHandleFormSubmissionWithResponses() {
+  public static function providerTestHandleFormSubmissionWithResponses() {
     return [
       ['Symfony\Component\HttpFoundation\Response', 'response'],
       ['Symfony\Component\HttpFoundation\RedirectResponse', 'redirect'],
@@ -178,7 +178,7 @@ class FormSubmitterTest extends UnitTestCase {
    * @return array
    *   Returns some test data.
    */
-  public function providerTestRedirectWithUrl() {
+  public static function providerTestRedirectWithUrl() {
     return [
       [new Url('test_route_a', [], ['absolute' => TRUE]), 'test-route'],
       [new Url('test_route_b', ['key' => 'value'], ['absolute' => TRUE]), 'test-route/value'],
diff --git a/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php b/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php
index db334a0feef6..ae523863d100 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php
@@ -183,7 +183,7 @@ class FormValidatorTest extends UnitTestCase {
     $this->assertSame($expected, $form_state->getValues());
   }
 
-  public function providerTestHandleErrorsWithLimitedValidation() {
+  public static function providerTestHandleErrorsWithLimitedValidation() {
     return [
       // Test with a non-existent section.
       [
@@ -319,7 +319,7 @@ class FormValidatorTest extends UnitTestCase {
     $form_validator->validateForm('test_form_id', $form, $form_state);
   }
 
-  public function providerTestRequiredErrorMessage() {
+  public static function providerTestRequiredErrorMessage() {
     return [
       [
         // Use the default message with a title.
diff --git a/core/tests/Drupal/Tests/Core/Form/OptGroupTest.php b/core/tests/Drupal/Tests/Core/Form/OptGroupTest.php
index dcd20b47b36a..25f6bf5668aa 100644
--- a/core/tests/Drupal/Tests/Core/Form/OptGroupTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/OptGroupTest.php
@@ -27,7 +27,7 @@ class OptGroupTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestFlattenOptions() {
+  public static function providerTestFlattenOptions() {
     $object1 = new \stdClass();
     $object1->option = ['foo' => 'foo'];
     $object2 = new \stdClass();
diff --git a/core/tests/Drupal/Tests/Core/Form/SubformStateTest.php b/core/tests/Drupal/Tests/Core/Form/SubformStateTest.php
index 1f6d3df502f6..016fa6a19719 100644
--- a/core/tests/Drupal/Tests/Core/Form/SubformStateTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/SubformStateTest.php
@@ -152,7 +152,7 @@ class SubformStateTest extends UnitTestCase {
   /**
    * Provides data to self::testGetValue().
    */
-  public function providerTestGetValue() {
+  public static function providerTestGetValue() {
     $data = [];
     $data['exist'] = [
       ['dog'],
@@ -176,7 +176,7 @@ class SubformStateTest extends UnitTestCase {
   /**
    * Provides data to self::testGetValueBroken().
    */
-  public function providerTestGetValueBroken() {
+  public static function providerTestGetValueBroken() {
     $data = [];
     $data['nested'] = [
       ['dog', 'name'],
@@ -205,7 +205,7 @@ class SubformStateTest extends UnitTestCase {
   /**
    * Provides data to self::testSetValues().
    */
-  public function providerTestSetValues() {
+  public static function providerTestSetValues() {
     $data = [];
     $data['exist'] = [
       ['dog'],
diff --git a/core/tests/Drupal/Tests/Core/Http/CacheableExceptionTest.php b/core/tests/Drupal/Tests/Core/Http/CacheableExceptionTest.php
index 7dbd3f9fb405..edd771a7408d 100644
--- a/core/tests/Drupal/Tests/Core/Http/CacheableExceptionTest.php
+++ b/core/tests/Drupal/Tests/Core/Http/CacheableExceptionTest.php
@@ -59,7 +59,7 @@ class CacheableExceptionTest extends UnitTestCase {
     $this->assertSame(123, $exception->getCode());
   }
 
-  public function providerTestExceptions() {
+  public static function providerTestExceptions() {
     return [
       [400, CacheableBadRequestHttpException::class],
       [401, CacheableUnauthorizedHttpException::class, 'test challenge', ['WWW-Authenticate' => 'test challenge']],
diff --git a/core/tests/Drupal/Tests/Core/Http/ClientFactoryTest.php b/core/tests/Drupal/Tests/Core/Http/ClientFactoryTest.php
index 94a35cecbaad..d880ee1d6452 100644
--- a/core/tests/Drupal/Tests/Core/Http/ClientFactoryTest.php
+++ b/core/tests/Drupal/Tests/Core/Http/ClientFactoryTest.php
@@ -64,7 +64,7 @@ class ClientFactoryTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestCreateFromOptions() {
+  public static function providerTestCreateFromOptions() {
     return [
       [[], [], ['verify' => TRUE, 'timeout' => 30]],
       [['timeout' => 40], [], ['verify' => TRUE, 'timeout' => 40]],
diff --git a/core/tests/Drupal/Tests/Core/Http/TrustedHostsRequestFactoryTest.php b/core/tests/Drupal/Tests/Core/Http/TrustedHostsRequestFactoryTest.php
index b9895ee4e8fb..57530376ee2b 100644
--- a/core/tests/Drupal/Tests/Core/Http/TrustedHostsRequestFactoryTest.php
+++ b/core/tests/Drupal/Tests/Core/Http/TrustedHostsRequestFactoryTest.php
@@ -46,7 +46,7 @@ class TrustedHostsRequestFactoryTest extends UnitTestCase {
    *   TrustedHostsRequestFactory::createRequest().
    *   - A string containing the expected host of the created request.
    */
-  public function providerTestCreateRequest() {
+  public static function providerTestCreateRequest() {
     $tests = [];
     $tests[] = ['example.com', [], 'example.com'];
     $tests[] = ['localhost', [], 'localhost'];
diff --git a/core/tests/Drupal/Tests/Core/Language/LanguageUnitTest.php b/core/tests/Drupal/Tests/Core/Language/LanguageUnitTest.php
index 67e16ab64ec7..e347ed5fe25c 100644
--- a/core/tests/Drupal/Tests/Core/Language/LanguageUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Language/LanguageUnitTest.php
@@ -105,7 +105,7 @@ class LanguageUnitTest extends UnitTestCase {
    * @return array
    *   An array of test data.
    */
-  public function providerTestSortArrayOfLanguages() {
+  public static function providerTestSortArrayOfLanguages() {
     $language9A = new Language(['id' => 'dd', 'name' => 'A', 'weight' => 9]);
     $language10A = new Language(['id' => 'ee', 'name' => 'A', 'weight' => 10]);
     $language10B = new Language(['id' => 'ff', 'name' => 'B', 'weight' => 10]);
diff --git a/core/tests/Drupal/Tests/Core/Layout/LayoutDefaultTest.php b/core/tests/Drupal/Tests/Core/Layout/LayoutDefaultTest.php
index 142b31a3d76c..9bb982c9f127 100644
--- a/core/tests/Drupal/Tests/Core/Layout/LayoutDefaultTest.php
+++ b/core/tests/Drupal/Tests/Core/Layout/LayoutDefaultTest.php
@@ -52,7 +52,7 @@ class LayoutDefaultTest extends UnitTestCase {
   /**
    * Provides test data for ::testBuild().
    */
-  public function providerTestBuild() {
+  public static function providerTestBuild() {
     $data = [];
     // Empty regions are not added.
     $data['right_only'] = [
diff --git a/core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php b/core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php
index 537d727fb6cc..5e88cd9be7cc 100644
--- a/core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php
+++ b/core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php
@@ -39,7 +39,7 @@ class LogMessageParserTest extends UnitTestCase {
   /**
    * Data provider for testParseMessagePlaceholders().
    */
-  public function providerTestParseMessagePlaceholders() {
+  public static function providerTestParseMessagePlaceholders() {
     return [
       'PSR3-style placeholder' => [
         ['message' => 'User {username} created', 'context' => ['username' => 'Dries']],
diff --git a/core/tests/Drupal/Tests/Core/Menu/LocalTaskDefaultTest.php b/core/tests/Drupal/Tests/Core/Menu/LocalTaskDefaultTest.php
index 7d966e36aaa2..223fb5a6d6cc 100644
--- a/core/tests/Drupal/Tests/Core/Menu/LocalTaskDefaultTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/LocalTaskDefaultTest.php
@@ -190,7 +190,7 @@ class LocalTaskDefaultTest extends UnitTestCase {
    * @return array
    *   A list or test plugin definition and expected weight.
    */
-  public function providerTestGetWeight() {
+  public static function providerTestGetWeight() {
     return [
       // Manually specify a weight, so this is used.
       [['weight' => 314], 'test_id', 314],
diff --git a/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php b/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php
index 8b87382fb920..df19630a04dd 100644
--- a/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/MenuTreeParametersTest.php
@@ -19,7 +19,7 @@ class MenuTreeParametersTest extends UnitTestCase {
   /**
    * Provides test data for testSetMinDepth().
    */
-  public function providerTestSetMinDepth() {
+  public static function providerTestSetMinDepth() {
     $data = [];
 
     // Valid values at the extremes and in the middle.
diff --git a/core/tests/Drupal/Tests/Core/Menu/StaticMenuLinkOverridesTest.php b/core/tests/Drupal/Tests/Core/Menu/StaticMenuLinkOverridesTest.php
index 39983742006e..bd6944b62e30 100644
--- a/core/tests/Drupal/Tests/Core/Menu/StaticMenuLinkOverridesTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/StaticMenuLinkOverridesTest.php
@@ -47,7 +47,7 @@ class StaticMenuLinkOverridesTest extends UnitTestCase {
   /**
    * Provides test data for testLoadOverride.
    */
-  public function providerTestLoadOverride() {
+  public static function providerTestLoadOverride() {
     $data = [];
     // Valid ID.
     $data[] = [['test1' => ['parent' => 'test0']], 'test1', ['parent' => 'test0']];
@@ -181,7 +181,7 @@ class StaticMenuLinkOverridesTest extends UnitTestCase {
   /**
    * Provides test data for testDeleteOverrides.
    */
-  public function providerTestDeleteOverrides() {
+  public static function providerTestDeleteOverrides() {
     $data = [];
     // Delete a non existing ID.
     $data[] = ['test0', [], []];
diff --git a/core/tests/Drupal/Tests/Core/PageCache/ChainRequestPolicyTest.php b/core/tests/Drupal/Tests/Core/PageCache/ChainRequestPolicyTest.php
index cf612b8f3777..227cfc835332 100644
--- a/core/tests/Drupal/Tests/Core/PageCache/ChainRequestPolicyTest.php
+++ b/core/tests/Drupal/Tests/Core/PageCache/ChainRequestPolicyTest.php
@@ -92,7 +92,7 @@ class ChainRequestPolicyTest extends UnitTestCase {
    * @return array
    *   Test input and expected result.
    */
-  public function providerChainExceptionOnInvalidReturnValue() {
+  public static function providerChainExceptionOnInvalidReturnValue() {
     return [
       [FALSE],
       [0],
@@ -130,7 +130,7 @@ class ChainRequestPolicyTest extends UnitTestCase {
    * @return array
    *   Test input and expected result.
    */
-  public function providerAllowIfAnyRuleReturnedAllow() {
+  public static function providerAllowIfAnyRuleReturnedAllow() {
     return [
       [[RequestPolicyInterface::ALLOW]],
       [[NULL, RequestPolicyInterface::ALLOW]],
diff --git a/core/tests/Drupal/Tests/Core/PageCache/ChainResponsePolicyTest.php b/core/tests/Drupal/Tests/Core/PageCache/ChainResponsePolicyTest.php
index 5daf21b7743d..377d5a16d5fa 100644
--- a/core/tests/Drupal/Tests/Core/PageCache/ChainResponsePolicyTest.php
+++ b/core/tests/Drupal/Tests/Core/PageCache/ChainResponsePolicyTest.php
@@ -101,7 +101,7 @@ class ChainResponsePolicyTest extends UnitTestCase {
    * @return array
    *   Test input and expected result.
    */
-  public function providerChainExceptionOnInvalidReturnValue() {
+  public static function providerChainExceptionOnInvalidReturnValue() {
     return [
       [FALSE],
       [0],
diff --git a/core/tests/Drupal/Tests/Core/PageCache/CommandLineOrUnsafeMethodTest.php b/core/tests/Drupal/Tests/Core/PageCache/CommandLineOrUnsafeMethodTest.php
index fab3ccd2996a..99eb53cd7332 100644
--- a/core/tests/Drupal/Tests/Core/PageCache/CommandLineOrUnsafeMethodTest.php
+++ b/core/tests/Drupal/Tests/Core/PageCache/CommandLineOrUnsafeMethodTest.php
@@ -56,7 +56,7 @@ class CommandLineOrUnsafeMethodTest extends UnitTestCase {
    * @return array
    *   Test data and expected results.
    */
-  public function providerTestHttpMethod() {
+  public static function providerTestHttpMethod() {
     return [
       [NULL, 'GET'],
       [NULL, 'HEAD'],
diff --git a/core/tests/Drupal/Tests/Core/ParamConverter/EntityConverterTest.php b/core/tests/Drupal/Tests/Core/ParamConverter/EntityConverterTest.php
index b595fdb74a38..3490bd362f08 100644
--- a/core/tests/Drupal/Tests/Core/ParamConverter/EntityConverterTest.php
+++ b/core/tests/Drupal/Tests/Core/ParamConverter/EntityConverterTest.php
@@ -169,7 +169,7 @@ class EntityConverterTest extends UnitTestCase {
   /**
    * Provides test data for testApplies()
    */
-  public function providerTestApplies() {
+  public static function providerTestApplies() {
     $data = [];
     $data[] = [['type' => 'entity:foo'], 'foo', new Route('/test/{foo}/bar'), FALSE];
     $data[] = [['type' => 'entity:entity_test'], 'foo', new Route('/test/{foo}/bar'), TRUE];
@@ -203,7 +203,7 @@ class EntityConverterTest extends UnitTestCase {
   /**
    * Provides test data for testConvert.
    */
-  public function providerTestConvert() {
+  public static function providerTestConvert() {
     $data = [];
     // Existing entity type.
     $data[] = ['valid_id', ['type' => 'entity:entity_test'], ['foo' => 'valid_id'], (object) ['id' => 'valid_id']];
diff --git a/core/tests/Drupal/Tests/Core/ParamConverter/EntityRevisionParamConverterTest.php b/core/tests/Drupal/Tests/Core/ParamConverter/EntityRevisionParamConverterTest.php
index 2592562b9e2b..330ab0ff0f31 100644
--- a/core/tests/Drupal/Tests/Core/ParamConverter/EntityRevisionParamConverterTest.php
+++ b/core/tests/Drupal/Tests/Core/ParamConverter/EntityRevisionParamConverterTest.php
@@ -88,7 +88,7 @@ class EntityRevisionParamConverterTest extends UnitTestCase {
   /**
    * Provides test data for testConvert.
    */
-  public function providerTestConvert() {
+  public static function providerTestConvert() {
     $data = [];
     // Existing entity type.
     $data[] = ['valid_id', ['type' => 'entity_revision:entity_test'], ['test_revision' => 'valid_id'], (object) ['revision_id' => 'valid_id']];
diff --git a/core/tests/Drupal/Tests/Core/ParamConverter/ParamConverterManagerTest.php b/core/tests/Drupal/Tests/Core/ParamConverter/ParamConverterManagerTest.php
index 017c50179c9a..e518f99e6eff 100644
--- a/core/tests/Drupal/Tests/Core/ParamConverter/ParamConverterManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/ParamConverter/ParamConverterManagerTest.php
@@ -112,7 +112,7 @@ class ParamConverterManagerTest extends UnitTestCase {
    *
    * @see ParamConverterManagerTest::testGetConverter()
    */
-  public function providerTestGetConverter() {
+  public static function providerTestGetConverter() {
     return [
       ['ape', 'ApeConverterClass'],
       ['cat', 'CatConverterClass'],
@@ -159,7 +159,7 @@ class ParamConverterManagerTest extends UnitTestCase {
   /**
    * Provides data for testSetRouteParameterConverters().
    */
-  public function providerTestSetRouteParameterConverters() {
+  public static function providerTestSetRouteParameterConverters() {
     return [
       ['/test'],
       ['/test/{id}', ['id' => []], 'applied'],
diff --git a/core/tests/Drupal/Tests/Core/Password/PhpPasswordTest.php b/core/tests/Drupal/Tests/Core/Password/PhpPasswordTest.php
index 646df5091637..ec62177e9679 100644
--- a/core/tests/Drupal/Tests/Core/Password/PhpPasswordTest.php
+++ b/core/tests/Drupal/Tests/Core/Password/PhpPasswordTest.php
@@ -106,7 +106,7 @@ class PhpPasswordTest extends UnitTestCase {
   /**
    * Provides the test matrix for testLongPassword().
    */
-  public function providerLongPasswords() {
+  public static function providerLongPasswords() {
     // '512 byte long password is allowed.'
     $passwords['allowed'] = [str_repeat('x', PasswordInterface::PASSWORD_MAX_LENGTH), TRUE];
     // 513 byte long password is not allowed.
diff --git a/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php b/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php
index d733204fa14d..1213e9e35095 100644
--- a/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php
+++ b/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php
@@ -57,7 +57,7 @@ class PathMatcherTest extends UnitTestCase {
    * @return array
    *   A nested array of pattern arrays and path arrays.
    */
-  public function getMatchPathData() {
+  public static function getMatchPathData() {
     return [
       [
         // Single absolute paths.
diff --git a/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorFrontTest.php b/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorFrontTest.php
index 782fe3b55c92..9cdd35e54e9a 100644
--- a/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorFrontTest.php
+++ b/core/tests/Drupal/Tests/Core/PathProcessor/PathProcessorFrontTest.php
@@ -41,7 +41,7 @@ class PathProcessorFrontTest extends UnitTestCase {
   /**
    * Inbound paths and expected results.
    */
-  public function providerProcessInbound() {
+  public static function providerProcessInbound() {
     return [
       'accessing frontpage' => ['/node', '/', '/node'],
       'accessing non frontpage' => ['/node', '/user', '/user'],
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionIsSatisfiedTest.php b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionIsSatisfiedTest.php
index 66266bd616ca..1fd6da4f1ac4 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionIsSatisfiedTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionIsSatisfiedTest.php
@@ -82,7 +82,7 @@ class ContextDefinitionIsSatisfiedTest extends UnitTestCase {
   /**
    * Provides test data for ::testIsSatisfiedBy().
    */
-  public function providerTestIsSatisfiedBy() {
+  public static function providerTestIsSatisfiedBy() {
     $data = [];
 
     // Simple data types.
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php
index 6a54511a545a..0ddf0a4178ee 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php
@@ -21,7 +21,7 @@ class ContextDefinitionTest extends UnitTestCase {
   /**
    * Very simple data provider.
    */
-  public function providerGetDataDefinition() {
+  public static function providerGetDataDefinition() {
     return [
       [TRUE],
       [FALSE],
@@ -163,7 +163,7 @@ class ContextDefinitionTest extends UnitTestCase {
   /**
    * Data provider for testGetConstraint.
    */
-  public function providerGetConstraint() {
+  public static function providerGetConstraint() {
     return [
       [NULL, [], 'nonexistent_constraint_name'],
       [
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Context/EntityContextDefinitionIsSatisfiedTest.php b/core/tests/Drupal/Tests/Core/Plugin/Context/EntityContextDefinitionIsSatisfiedTest.php
index 58cc1e1102ab..5e9c909e4a3a 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Context/EntityContextDefinitionIsSatisfiedTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Context/EntityContextDefinitionIsSatisfiedTest.php
@@ -244,7 +244,7 @@ class EntityContextDefinitionIsSatisfiedTest extends UnitTestCase {
   /**
    * Provides test data for ::testIsSatisfiedByGenerateBundledEntity().
    */
-  public function providerTestIsSatisfiedByGenerateBundledEntity() {
+  public static function providerTestIsSatisfiedByGenerateBundledEntity() {
     $data = [];
     $data['no requirement'] = [
       TRUE,
@@ -322,7 +322,7 @@ class EntityContextDefinitionIsSatisfiedTest extends UnitTestCase {
   /**
    * Provides test data for ::testIsSatisfiedByPassBundledEntity().
    */
-  public function providerTestIsSatisfiedByPassBundledEntity() {
+  public static function providerTestIsSatisfiedByPassBundledEntity() {
     $data = [];
     $data[] = [TRUE, []];
     $data[] = [FALSE, ['first_bundle']];
diff --git a/core/tests/Drupal/Tests/Core/Plugin/ContextHandlerTest.php b/core/tests/Drupal/Tests/Core/Plugin/ContextHandlerTest.php
index c3a655eb3837..925badd54fad 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/ContextHandlerTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/ContextHandlerTest.php
@@ -201,7 +201,7 @@ class ContextHandlerTest extends UnitTestCase {
   /**
    * Provides data for testFilterPluginDefinitionsByContexts().
    */
-  public function providerTestFilterPluginDefinitionsByContexts() {
+  public static function providerTestFilterPluginDefinitionsByContexts() {
     $data = [];
 
     $plugins = [];
diff --git a/core/tests/Drupal/Tests/Core/Plugin/DefaultLazyPluginCollectionTest.php b/core/tests/Drupal/Tests/Core/Plugin/DefaultLazyPluginCollectionTest.php
index 5f78e8ac8930..70b62410e802 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/DefaultLazyPluginCollectionTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/DefaultLazyPluginCollectionTest.php
@@ -64,7 +64,7 @@ class DefaultLazyPluginCollectionTest extends LazyPluginCollectionTestBase {
    * @return array
    *   The test data.
    */
-  public function providerTestSortHelper() {
+  public static function providerTestSortHelper() {
     return [
       ['apple', 'apple', 0],
       ['apple', 'cherry', -1],
diff --git a/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php b/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php
index 196598b40f1a..2f865f65a869 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php
@@ -414,7 +414,7 @@ class DefaultPluginManagerTest extends UnitTestCase {
     $this->assertEquals($expected, $definition);
   }
 
-  public function providerTestProcessDefinition() {
+  public static function providerTestProcessDefinition() {
     $data = [];
 
     $data['merge'][] = [
diff --git a/core/tests/Drupal/Tests/Core/Plugin/FilteredPluginManagerTraitTest.php b/core/tests/Drupal/Tests/Core/Plugin/FilteredPluginManagerTraitTest.php
index e0a5f141ffba..15896ffb7ca4 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/FilteredPluginManagerTraitTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/FilteredPluginManagerTraitTest.php
@@ -56,7 +56,7 @@ class FilteredPluginManagerTraitTest extends UnitTestCase {
   /**
    * Provides test data for ::testGetFilteredDefinitions().
    */
-  public function providerTestGetFilteredDefinitions() {
+  public static function providerTestGetFilteredDefinitions() {
     $data = [];
     $data['populated context'] = [
       ['context1' => 'fake context'],
diff --git a/core/tests/Drupal/Tests/Core/Plugin/PluginWithFormsTraitTest.php b/core/tests/Drupal/Tests/Core/Plugin/PluginWithFormsTraitTest.php
index 4c1b10ebf610..46ede2cb185b 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/PluginWithFormsTraitTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/PluginWithFormsTraitTest.php
@@ -30,7 +30,7 @@ class PluginWithFormsTraitTest extends UnitTestCase {
   /**
    * @return array
    */
-  public function providerGetFormClass() {
+  public static function providerGetFormClass() {
     $block_plugin_without_forms = new TestClass([], 'block_plugin_without_forms', [
       'provider' => 'block_test',
     ]);
diff --git a/core/tests/Drupal/Tests/Core/Render/BubbleableMetadataTest.php b/core/tests/Drupal/Tests/Core/Render/BubbleableMetadataTest.php
index c0502152bea5..5895cf5ef39d 100644
--- a/core/tests/Drupal/Tests/Core/Render/BubbleableMetadataTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/BubbleableMetadataTest.php
@@ -67,7 +67,7 @@ class BubbleableMetadataTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestMerge() {
+  public static function providerTestMerge() {
     return [
       // Second operand is a BubbleableMetadata object.
       // All empty.
@@ -118,7 +118,7 @@ class BubbleableMetadataTest extends UnitTestCase {
   /**
    * Provides test data for testAddAttachments().
    */
-  public function providerTestAddAttachments() {
+  public static function providerTestAddAttachments() {
     return [
       [new BubbleableMetadata(), [], new BubbleableMetadata()],
       [new BubbleableMetadata(), ['library' => ['core/foo']], (new BubbleableMetadata())->setAttachments(['library' => ['core/foo']])],
@@ -140,7 +140,7 @@ class BubbleableMetadataTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestApplyTo() {
+  public static function providerTestApplyTo() {
     $data = [];
 
     $empty_metadata = new BubbleableMetadata();
@@ -204,7 +204,7 @@ class BubbleableMetadataTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestCreateFromRenderArray() {
+  public static function providerTestCreateFromRenderArray() {
     $data = [];
 
     $empty_metadata = new BubbleableMetadata();
@@ -398,7 +398,7 @@ class BubbleableMetadataTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestMergeAttachmentsHtmlHeadMerging() {
+  public static function providerTestMergeAttachmentsHtmlHeadMerging() {
     $meta = [
       '#tag' => 'meta',
       '#attributes' => [
@@ -471,7 +471,7 @@ class BubbleableMetadataTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestMergeAttachmentsHtmlHeadLinkMerging() {
+  public static function providerTestMergeAttachmentsHtmlHeadLinkMerging() {
     $rel = [
       'rel' => 'rel',
       'href' => 'http://rel.example.com',
@@ -537,7 +537,7 @@ class BubbleableMetadataTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestMergeAttachmentsHttpHeaderMerging() {
+  public static function providerTestMergeAttachmentsHttpHeaderMerging() {
     $content_type = [
       'Content-Type',
       'application/rss+xml; charset=utf-8',
diff --git a/core/tests/Drupal/Tests/Core/Render/Element/HtmlTagTest.php b/core/tests/Drupal/Tests/Core/Render/Element/HtmlTagTest.php
index e0f5bceb13f9..104f0fec1403 100644
--- a/core/tests/Drupal/Tests/Core/Render/Element/HtmlTagTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/Element/HtmlTagTest.php
@@ -42,7 +42,7 @@ class HtmlTagTest extends RendererTestBase {
   /**
    * Data provider for preRenderHtmlTag test.
    */
-  public function providerPreRenderHtmlTag() {
+  public static function providerPreRenderHtmlTag() {
     $tags = [];
 
     // Value prefix/suffix.
diff --git a/core/tests/Drupal/Tests/Core/Render/Element/MachineNameTest.php b/core/tests/Drupal/Tests/Core/Render/Element/MachineNameTest.php
index c6ccbc3f3aa2..1361a55ee1d6 100644
--- a/core/tests/Drupal/Tests/Core/Render/Element/MachineNameTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/Element/MachineNameTest.php
@@ -34,7 +34,7 @@ class MachineNameTest extends UnitTestCase {
   /**
    * Data provider for testValueCallback().
    */
-  public function providerTestValueCallback() {
+  public static function providerTestValueCallback() {
     $data = [];
     $data[] = [NULL, FALSE];
     $data[] = [NULL, NULL];
diff --git a/core/tests/Drupal/Tests/Core/Render/Element/PasswordConfirmTest.php b/core/tests/Drupal/Tests/Core/Render/Element/PasswordConfirmTest.php
index 655f8da70ea4..1862a3a343e3 100644
--- a/core/tests/Drupal/Tests/Core/Render/Element/PasswordConfirmTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/Element/PasswordConfirmTest.php
@@ -27,7 +27,7 @@ class PasswordConfirmTest extends UnitTestCase {
   /**
    * Data provider for testValueCallback().
    */
-  public function providerTestValueCallback() {
+  public static function providerTestValueCallback() {
     $data = [];
     $data[] = [['pass1' => '', 'pass2' => ''], [], NULL];
     $data[] = [['pass1' => '', 'pass2' => ''], ['#default_value' => ['pass2' => 'value']], NULL];
diff --git a/core/tests/Drupal/Tests/Core/Render/Element/PasswordTest.php b/core/tests/Drupal/Tests/Core/Render/Element/PasswordTest.php
index 35dcea028dba..9085722c3ec3 100644
--- a/core/tests/Drupal/Tests/Core/Render/Element/PasswordTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/Element/PasswordTest.php
@@ -28,7 +28,7 @@ class PasswordTest extends UnitTestCase {
   /**
    * Data provider for testValueCallback().
    */
-  public function providerTestValueCallback() {
+  public static function providerTestValueCallback() {
     $data = [];
     $data[] = [NULL, FALSE];
     $data[] = [NULL, NULL];
diff --git a/core/tests/Drupal/Tests/Core/Render/Element/TextareaTest.php b/core/tests/Drupal/Tests/Core/Render/Element/TextareaTest.php
index 3218c61d6d99..e66a2819a40e 100644
--- a/core/tests/Drupal/Tests/Core/Render/Element/TextareaTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/Element/TextareaTest.php
@@ -28,7 +28,7 @@ class TextareaTest extends UnitTestCase {
   /**
    * Data provider for testValueCallback().
    */
-  public function providerTestValueCallback() {
+  public static function providerTestValueCallback() {
     $data = [];
     $data[] = [NULL, FALSE];
     $data[] = [NULL, NULL];
diff --git a/core/tests/Drupal/Tests/Core/Render/Element/TextfieldTest.php b/core/tests/Drupal/Tests/Core/Render/Element/TextfieldTest.php
index 640bff423eda..5ec874b2d924 100644
--- a/core/tests/Drupal/Tests/Core/Render/Element/TextfieldTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/Element/TextfieldTest.php
@@ -28,7 +28,7 @@ class TextfieldTest extends UnitTestCase {
   /**
    * Data provider for testValueCallback().
    */
-  public function providerTestValueCallback() {
+  public static function providerTestValueCallback() {
     $data = [];
     $data[] = [NULL, FALSE];
     $data[] = [NULL, NULL];
diff --git a/core/tests/Drupal/Tests/Core/Render/Element/TokenTest.php b/core/tests/Drupal/Tests/Core/Render/Element/TokenTest.php
index 1efeb73a88f2..40f1bea21ab6 100644
--- a/core/tests/Drupal/Tests/Core/Render/Element/TokenTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/Element/TokenTest.php
@@ -28,7 +28,7 @@ class TokenTest extends UnitTestCase {
   /**
    * Data provider for testValueCallback().
    */
-  public function providerTestValueCallback() {
+  public static function providerTestValueCallback() {
     $data = [];
     $data[] = [NULL, FALSE];
     $data[] = [NULL, NULL];
diff --git a/core/tests/Drupal/Tests/Core/Render/ElementInfoManagerTest.php b/core/tests/Drupal/Tests/Core/Render/ElementInfoManagerTest.php
index d9a970c7c94b..aae2733dbe21 100644
--- a/core/tests/Drupal/Tests/Core/Render/ElementInfoManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/ElementInfoManagerTest.php
@@ -114,7 +114,7 @@ class ElementInfoManagerTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestGetInfoElementPlugin() {
+  public static function providerTestGetInfoElementPlugin() {
     $data = [];
     $data[] = [
       'Drupal\Core\Render\Element\ElementInterface',
diff --git a/core/tests/Drupal/Tests/Core/Render/ElementTest.php b/core/tests/Drupal/Tests/Core/Render/ElementTest.php
index 39e0aae6aeca..31f3a7b8a2c6 100644
--- a/core/tests/Drupal/Tests/Core/Render/ElementTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/ElementTest.php
@@ -142,7 +142,7 @@ class ElementTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerVisibleChildren() {
+  public static function providerVisibleChildren() {
     return [
       [['#property1' => '', '#property2' => []], []],
       [['#property1' => '', 'child1' => []], ['child1']],
@@ -169,7 +169,7 @@ class ElementTest extends UnitTestCase {
   /**
    * Data provider for testSetAttributes().
    */
-  public function providerTestSetAttributes() {
+  public static function providerTestSetAttributes() {
     $base = ['#id' => 'id', '#class' => []];
     return [
       [$base, [], $base],
@@ -187,7 +187,7 @@ class ElementTest extends UnitTestCase {
     $this->assertSame(Element::isEmpty($element), $expected);
   }
 
-  public function providerTestIsEmpty() {
+  public static function providerTestIsEmpty() {
     return [
       [[], TRUE],
       [['#attached' => []], FALSE],
diff --git a/core/tests/Drupal/Tests/Core/Render/MetadataBubblingUrlGeneratorTest.php b/core/tests/Drupal/Tests/Core/Render/MetadataBubblingUrlGeneratorTest.php
index 2b1e75f32fdc..2c54d6146bce 100644
--- a/core/tests/Drupal/Tests/Core/Render/MetadataBubblingUrlGeneratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/MetadataBubblingUrlGeneratorTest.php
@@ -69,7 +69,7 @@ class MetadataBubblingUrlGeneratorTest extends UrlGeneratorTest {
   /**
    * Data provider for ::testUrlBubbleableMetadataBubbling().
    */
-  public function providerUrlBubbleableMetadataBubbling() {
+  public static function providerUrlBubbleableMetadataBubbling() {
     return [
       // No bubbling when bubbleable metadata is collected.
       [TRUE, 0, []],
diff --git a/core/tests/Drupal/Tests/Core/Render/PlaceholderGeneratorTest.php b/core/tests/Drupal/Tests/Core/Render/PlaceholderGeneratorTest.php
index c248c9f78faf..e803b199d160 100644
--- a/core/tests/Drupal/Tests/Core/Render/PlaceholderGeneratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/PlaceholderGeneratorTest.php
@@ -85,7 +85,7 @@ class PlaceholderGeneratorTest extends RendererTestBase {
   /**
    * @return array
    */
-  public function providerCreatePlaceholderGeneratesValidHtmlMarkup() {
+  public static function providerCreatePlaceholderGeneratesValidHtmlMarkup() {
     return [
       'multiple-arguments' => [['#lazy_builder' => ['Drupal\Tests\Core\Render\PlaceholdersTest::callback', ['foo', 'bar']]]],
       'special-character-&' => [['#lazy_builder' => ['Drupal\Tests\Core\Render\PlaceholdersTest::callback', ['foo&bar']]]],
diff --git a/core/tests/Drupal/Tests/Core/Render/RendererBubblingTest.php b/core/tests/Drupal/Tests/Core/Render/RendererBubblingTest.php
index fb6a43c9fb0b..514f7fe4a762 100644
--- a/core/tests/Drupal/Tests/Core/Render/RendererBubblingTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/RendererBubblingTest.php
@@ -146,7 +146,7 @@ class RendererBubblingTest extends RendererTestBase {
     $this->assertRenderCacheItem($element['#cache']['keys'], $expected_cache_item);
   }
 
-  public function providerTestContextBubblingEdgeCases() {
+  public static function providerTestContextBubblingEdgeCases() {
     $data = [];
 
     // Cache contexts of inaccessible children aren't bubbled (because those
@@ -498,7 +498,7 @@ class RendererBubblingTest extends RendererTestBase {
    *
    * @return array
    */
-  public function providerTestBubblingWithPrerender() {
+  public static function providerTestBubblingWithPrerender() {
     $data = [];
 
     // Test element without theme.
diff --git a/core/tests/Drupal/Tests/Core/Render/RendererTest.php b/core/tests/Drupal/Tests/Core/Render/RendererTest.php
index 5096ba4b42ea..de0897251cfa 100644
--- a/core/tests/Drupal/Tests/Core/Render/RendererTest.php
+++ b/core/tests/Drupal/Tests/Core/Render/RendererTest.php
@@ -666,7 +666,7 @@ class RendererTest extends RendererTestBase {
    *
    * @return array
    */
-  public function providerRenderTwice() {
+  public static function providerRenderTwice() {
     return [
       [
         [
@@ -720,7 +720,7 @@ class RendererTest extends RendererTestBase {
    *
    * @return array
    */
-  public function providerAccessValues() {
+  public static function providerAccessValues() {
     return [
       [FALSE],
       [TRUE],
@@ -795,7 +795,7 @@ class RendererTest extends RendererTestBase {
    *
    * @return array
    */
-  public function providerRenderCache() {
+  public static function providerRenderCache() {
     return [
       'full access' => [
         NULL,
@@ -903,7 +903,7 @@ class RendererTest extends RendererTestBase {
     }
   }
 
-  public function providerTestRenderCacheMaxAge() {
+  public static function providerTestRenderCacheMaxAge() {
     return [
       [0, FALSE, NULL],
       [60, TRUE, (int) $_SERVER['REQUEST_TIME'] + 60],
@@ -973,7 +973,7 @@ class RendererTest extends RendererTestBase {
    *   An array of associative arrays of expected results keyed by property
    *   name.
    */
-  public function providerTestRenderCacheProperties() {
+  public static function providerTestRenderCacheProperties() {
     return [
       [[]],
       [['child1' => 0, 'child2' => 0, '#custom_property' => 0, '#custom_property_array' => 0]],
@@ -998,7 +998,7 @@ class RendererTest extends RendererTestBase {
     $this->assertEquals($build, $expected);
   }
 
-  public function providerTestAddCacheableDependency() {
+  public static function providerTestAddCacheableDependency() {
     return [
       // Empty render array, typical default cacheability.
       [
diff --git a/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php b/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php
index cd30ec3e1640..647a1819ef02 100644
--- a/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php
+++ b/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php
@@ -87,7 +87,7 @@ class RoleAccessCheckTest extends UnitTestCase {
    *
    * @see \Drupal\Tests\Core\Route\RouterRoleTest::testRoleAccess
    */
-  public function roleAccessProvider() {
+  public static function roleAccessProvider() {
     // Setup two different roles used in the test.
     $rid_1 = 'role_test_1';
     $rid_2 = 'role_test_2';
diff --git a/core/tests/Drupal/Tests/Core/Routing/AcceptHeaderMatcherTest.php b/core/tests/Drupal/Tests/Core/Routing/AcceptHeaderMatcherTest.php
index d05e0fe67446..3b62244155c5 100644
--- a/core/tests/Drupal/Tests/Core/Routing/AcceptHeaderMatcherTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/AcceptHeaderMatcherTest.php
@@ -45,7 +45,7 @@ class AcceptHeaderMatcherTest extends UnitTestCase {
    *
    * @see Drupal\Tests\Core\Routing\AcceptHeaderMatcherTest::testAcceptFiltering()
    */
-  public function acceptFilterProvider() {
+  public static function acceptFilterProvider() {
     return [
       // Check that JSON routes get filtered and prioritized correctly.
       ['application/json, text/xml;q=0.9', 'json', 'route_c', 'route_e'],
diff --git a/core/tests/Drupal/Tests/Core/Routing/ContentTypeHeaderMatcherTest.php b/core/tests/Drupal/Tests/Core/Routing/ContentTypeHeaderMatcherTest.php
index da8facef8dda..e3b44e12318d 100644
--- a/core/tests/Drupal/Tests/Core/Routing/ContentTypeHeaderMatcherTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/ContentTypeHeaderMatcherTest.php
@@ -57,7 +57,7 @@ class ContentTypeHeaderMatcherTest extends UnitTestCase {
     $this->assertCount(7, $routes, 'The correct number of routes was found.');
   }
 
-  public function providerTestSafeRequestFilter() {
+  public static function providerTestSafeRequestFilter() {
     return [
       ['GET'],
       ['HEAD'],
diff --git a/core/tests/Drupal/Tests/Core/Routing/RedirectDestinationTest.php b/core/tests/Drupal/Tests/Core/Routing/RedirectDestinationTest.php
index a41e39ef61f7..2bf84130126c 100644
--- a/core/tests/Drupal/Tests/Core/Routing/RedirectDestinationTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/RedirectDestinationTest.php
@@ -96,7 +96,7 @@ class RedirectDestinationTest extends UnitTestCase {
     $this->assertEquals(['destination' => $expected_destination], $this->redirectDestination->getAsArray());
   }
 
-  public function providerGet() {
+  public static function providerGet() {
     $data = [];
 
     $request = Request::create('/');
diff --git a/core/tests/Drupal/Tests/Core/Routing/RequestFormatRouteFilterTest.php b/core/tests/Drupal/Tests/Core/Routing/RequestFormatRouteFilterTest.php
index e6ba2b480a79..af9c6199a8c6 100644
--- a/core/tests/Drupal/Tests/Core/Routing/RequestFormatRouteFilterTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/RequestFormatRouteFilterTest.php
@@ -35,7 +35,7 @@ class RequestFormatRouteFilterTest extends UnitTestCase {
     $this->assertSame($expected_filtered_collection, array_keys($collection->all()));
   }
 
-  public function filterProvider() {
+  public static function filterProvider() {
     $route_without_format = new Route('/test');
     $route_with_format = new Route('/test');
     $route_with_format->setRequirement('_format', 'json');
diff --git a/core/tests/Drupal/Tests/Core/Routing/RouteCompilerTest.php b/core/tests/Drupal/Tests/Core/Routing/RouteCompilerTest.php
index 304c1c61cc0d..9c282fac1ff0 100644
--- a/core/tests/Drupal/Tests/Core/Routing/RouteCompilerTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/RouteCompilerTest.php
@@ -39,7 +39,7 @@ class RouteCompilerTest extends UnitTestCase {
    *   be calculated as the first value and the expected fit as the second
    *   value.
    */
-  public function providerTestGetFit() {
+  public static function providerTestGetFit() {
     return [
       ['test', 1],
       ['/estWithLeadingSlash', 1],
diff --git a/core/tests/Drupal/Tests/Core/Routing/TrustedRedirectResponseTest.php b/core/tests/Drupal/Tests/Core/Routing/TrustedRedirectResponseTest.php
index 53f977d427cf..440904c014b6 100644
--- a/core/tests/Drupal/Tests/Core/Routing/TrustedRedirectResponseTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/TrustedRedirectResponseTest.php
@@ -75,7 +75,7 @@ class TrustedRedirectResponseTest extends UnitTestCase {
   /**
    * @return array
    */
-  public function providerCreateFromRedirectResponse() {
+  public static function providerCreateFromRedirectResponse() {
     return [
       'cacheable-with-tags' => [(new CacheableRedirectResponse('/example'))->addCacheableDependency((new CacheableMetadata())->addCacheTags(['foo']))],
       'cacheable-with-max-age-0' => [(new CacheableRedirectResponse('/example'))->addCacheableDependency((new CacheableMetadata())->setCacheMaxAge(0))],
diff --git a/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php b/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php
index 5d3dc75ad19f..a576be6eb308 100644
--- a/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php
@@ -360,7 +360,7 @@ class UrlGeneratorTest extends UnitTestCase {
   /**
    * Provides test data for testAliasGenerationWithOptions.
    */
-  public function providerTestAliasGenerationWithOptions() {
+  public static function providerTestAliasGenerationWithOptions() {
     $data = [];
     // Extra parameters should appear in the query string.
     $data[] = [
@@ -517,7 +517,7 @@ class UrlGeneratorTest extends UnitTestCase {
   /**
    * Data provider for ::testNoPath().
    */
-  public function providerTestNoPath() {
+  public static function providerTestNoPath() {
     return [
       // Empty options.
       [[], ''],
diff --git a/core/tests/Drupal/Tests/Core/Security/DoTrustedCallbackTraitTest.php b/core/tests/Drupal/Tests/Core/Security/DoTrustedCallbackTraitTest.php
index f16ad55421a0..a97a5b6ab684 100644
--- a/core/tests/Drupal/Tests/Core/Security/DoTrustedCallbackTraitTest.php
+++ b/core/tests/Drupal/Tests/Core/Security/DoTrustedCallbackTraitTest.php
@@ -29,7 +29,7 @@ class DoTrustedCallbackTraitTest extends UnitTestCase {
   /**
    * Data provider for ::testTrustedCallbacks().
    */
-  public function providerTestTrustedCallbacks() {
+  public static function providerTestTrustedCallbacks() {
     $closure = function () {
       return 'test';
     };
@@ -58,7 +58,7 @@ class DoTrustedCallbackTraitTest extends UnitTestCase {
   /**
    * Data provider for ::testUntrustedCallbacks().
    */
-  public function providerTestUntrustedCallbacks() {
+  public static function providerTestUntrustedCallbacks() {
     $tests['TrustedCallbackInterface_object'] = [[new TrustedMethods(), 'unTrustedCallback'], TrustedInterface::class];
     $tests['TrustedCallbackInterface_static_string'] = ['\Drupal\Tests\Core\Security\TrustedMethods::unTrustedCallback', TrustedInterface::class];
     $tests['TrustedCallbackInterface_static_array'] = [[TrustedMethods::class, 'unTrustedCallback'], TrustedInterface::class];
@@ -99,7 +99,7 @@ class DoTrustedCallbackTraitTest extends UnitTestCase {
   /**
    * Data provider for tests of ::doTrustedCallback $error_type argument.
    */
-  public function errorTypeProvider() {
+  public static function errorTypeProvider() {
     $tests['untrusted_object'] = [[new UntrustedObject(), 'callback']];
     $tests['untrusted_object_static_string'] = ['Drupal\Tests\Core\Security\UntrustedObject::callback'];
     $tests['untrusted_object_static_array'] = [[UntrustedObject::class, 'callback']];
diff --git a/core/tests/Drupal/Tests/Core/Security/RequestSanitizerTest.php b/core/tests/Drupal/Tests/Core/Security/RequestSanitizerTest.php
index 1892b38e7220..6e508a1ea62b 100644
--- a/core/tests/Drupal/Tests/Core/Security/RequestSanitizerTest.php
+++ b/core/tests/Drupal/Tests/Core/Security/RequestSanitizerTest.php
@@ -99,7 +99,7 @@ class RequestSanitizerTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestRequestSanitization() {
+  public static function providerTestRequestSanitization() {
     $tests = [];
 
     $request = new Request(['q' => 'index.php']);
@@ -314,7 +314,7 @@ class RequestSanitizerTest extends UnitTestCase {
   /**
    * Data provider for testing acceptable destinations.
    */
-  public function providerTestAcceptableDestinations() {
+  public static function providerTestAcceptableDestinations() {
     $data = [];
     // Standard internal example node path is present in the 'destination'
     // parameter.
@@ -331,7 +331,7 @@ class RequestSanitizerTest extends UnitTestCase {
   /**
    * Data provider for testing sanitized destinations.
    */
-  public function providerTestSanitizedDestinations() {
+  public static function providerTestSanitizedDestinations() {
     $data = [];
     // External URL without scheme is not allowed.
     $data[] = ['//example.com/test'];
diff --git a/core/tests/Drupal/Tests/Core/Session/AccessPolicyProcessorTest.php b/core/tests/Drupal/Tests/Core/Session/AccessPolicyProcessorTest.php
index be29f17bea97..0e0113c5e50c 100644
--- a/core/tests/Drupal/Tests/Core/Session/AccessPolicyProcessorTest.php
+++ b/core/tests/Drupal/Tests/Core/Session/AccessPolicyProcessorTest.php
@@ -220,7 +220,7 @@ class AccessPolicyProcessorTest extends UnitTestCase {
    * @return array
    *   A list of testAccountSwitcher method arguments.
    */
-  public function accountSwitcherProvider() {
+  public static function accountSwitcherProvider() {
     $cases['no-user-context-no-current-user'] = [
       'has_user_context' => FALSE,
       'is_current_user' => FALSE,
@@ -301,7 +301,7 @@ class AccessPolicyProcessorTest extends UnitTestCase {
    * @return array
    *   A list of testAccountSwitcher method arguments.
    */
-  public function cachingProvider() {
+  public static function cachingProvider() {
     $cases = [
       'no-cache' => [FALSE, FALSE],
       'static-cache-hit' => [FALSE, TRUE],
diff --git a/core/tests/Drupal/Tests/Core/Session/SessionConfigurationTest.php b/core/tests/Drupal/Tests/Core/Session/SessionConfigurationTest.php
index 1e2433a4a807..2a2cbeee18ba 100644
--- a/core/tests/Drupal/Tests/Core/Session/SessionConfigurationTest.php
+++ b/core/tests/Drupal/Tests/Core/Session/SessionConfigurationTest.php
@@ -47,7 +47,7 @@ class SessionConfigurationTest extends UnitTestCase {
    * @return array
    *   Test data
    */
-  public function providerTestGeneratedCookieDomain() {
+  public static function providerTestGeneratedCookieDomain() {
     return [
       ['http://example.com/path/index.php', '.example.com'],
       ['http://www.example.com/path/index.php', '.www.example.com'],
@@ -86,7 +86,7 @@ class SessionConfigurationTest extends UnitTestCase {
    * @return array
    *   Test data
    */
-  public function providerTestEnforcedCookieDomain() {
+  public static function providerTestEnforcedCookieDomain() {
     return [
       ['http://example.com/path/index.php', '.example.com'],
       ['http://www.example.com/path/index.php', '.example.com'],
@@ -152,7 +152,7 @@ class SessionConfigurationTest extends UnitTestCase {
    * @return array
    *   Test data
    */
-  public function providerTestCookieSecure() {
+  public static function providerTestCookieSecure() {
     return [
       ['http://example.com/path/index.php', FALSE],
       ['https://www.example.com/path/index.php', TRUE],
@@ -185,7 +185,7 @@ class SessionConfigurationTest extends UnitTestCase {
    * @return array
    *   Test data
    */
-  public function providerTestGeneratedSessionName() {
+  public static function providerTestGeneratedSessionName() {
     $data = [
       ['http://example.com/path/index.php', 'SESS', 'example.com'],
       ['http://www.example.com/path/index.php', 'SESS', 'www.example.com'],
@@ -233,7 +233,7 @@ class SessionConfigurationTest extends UnitTestCase {
    * @return array
    *   Test data
    */
-  public function providerTestEnforcedSessionName() {
+  public static function providerTestEnforcedSessionName() {
     $data = [
       ['http://example.com/path/index.php', 'SESS', '.example.com'],
       ['http://www.example.com/path/index.php', 'SESS', '.example.com'],
@@ -279,7 +279,7 @@ class SessionConfigurationTest extends UnitTestCase {
    * @return array
    *   Test data
    */
-  public function providerTestConstructorDefaultSettings() {
+  public static function providerTestConstructorDefaultSettings() {
     return [
       [[], 48, 6],
       [['sid_length' => 100], 100, 6],
diff --git a/core/tests/Drupal/Tests/Core/Session/UserSessionTest.php b/core/tests/Drupal/Tests/Core/Session/UserSessionTest.php
index fdf72aea1083..b55cc05393ad 100644
--- a/core/tests/Drupal/Tests/Core/Session/UserSessionTest.php
+++ b/core/tests/Drupal/Tests/Core/Session/UserSessionTest.php
@@ -30,7 +30,7 @@ class UserSessionTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestHasPermission() {
+  public static function providerTestHasPermission() {
     $data = [];
     $data[] = ['example permission', ['user_one', 'user_two'], ['user_last']];
     $data[] = ['another example permission', ['user_two'], ['user_one', 'user_last']];
diff --git a/core/tests/Drupal/Tests/Core/Session/WriteSafeSessionHandlerTest.php b/core/tests/Drupal/Tests/Core/Session/WriteSafeSessionHandlerTest.php
index e44988f5f0c5..0f2c7498d759 100644
--- a/core/tests/Drupal/Tests/Core/Session/WriteSafeSessionHandlerTest.php
+++ b/core/tests/Drupal/Tests/Core/Session/WriteSafeSessionHandlerTest.php
@@ -162,7 +162,7 @@ class WriteSafeSessionHandlerTest extends UnitTestCase {
    * @return array
    *   Test data.
    */
-  public function providerTestOtherMethods() {
+  public static function providerTestOtherMethods() {
     return [
       ['open', TRUE, ['/some/path', 'some-session-id']],
       ['read', 'some-session-data', ['a-session-id']],
diff --git a/core/tests/Drupal/Tests/Core/Site/SettingsTest.php b/core/tests/Drupal/Tests/Core/Site/SettingsTest.php
index 928a7768607c..483c694fb4d5 100644
--- a/core/tests/Drupal/Tests/Core/Site/SettingsTest.php
+++ b/core/tests/Drupal/Tests/Core/Site/SettingsTest.php
@@ -101,7 +101,7 @@ class SettingsTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestGetHashSaltEmpty() {
+  public static function providerTestGetHashSaltEmpty() {
     return [
       [[]],
       [['hash_salt' => '']],
@@ -220,7 +220,7 @@ class SettingsTest extends UnitTestCase {
    *
    * @see self::providerTestRealDeprecatedSettings()
    */
-  public function providerTestFakeDeprecatedSettings(): array {
+  public static function providerTestFakeDeprecatedSettings(): array {
 
     $only_legacy = [
       'deprecated_legacy' => 'old',
@@ -306,7 +306,7 @@ class SettingsTest extends UnitTestCase {
   /**
    * Provides data for testRealDeprecatedSettings().
    */
-  public function providerTestRealDeprecatedSettings(): array {
+  public static function providerTestRealDeprecatedSettings(): array {
     return [
       [
         'block_interest_cohort',
@@ -368,7 +368,7 @@ class SettingsTest extends UnitTestCase {
   /**
    * Provides data for testDatabaseInfoInitialization().
    */
-  public function providerTestDatabaseInfoInitialization(): array {
+  public static function providerTestDatabaseInfoInitialization(): array {
     return [
       ['mysql', NULL, NULL, 'Drupal\\mysql\\Driver\\Database\\mysql', 'core/modules/mysql/src/Driver/Database/mysql/'],
       ['mysql', '', NULL, 'Drupal\\mysql\\Driver\\Database\\mysql', 'core/modules/mysql/src/Driver/Database/mysql/'],
diff --git a/core/tests/Drupal/Tests/Core/StackMiddleware/ContentLengthTest.php b/core/tests/Drupal/Tests/Core/StackMiddleware/ContentLengthTest.php
index 59212d739790..e406d11a02ab 100644
--- a/core/tests/Drupal/Tests/Core/StackMiddleware/ContentLengthTest.php
+++ b/core/tests/Drupal/Tests/Core/StackMiddleware/ContentLengthTest.php
@@ -34,7 +34,7 @@ class ContentLengthTest extends UnitTestCase {
     $this->assertSame((string) $expected_header, $response->headers->get('Content-Length'));
   }
 
-  public function providerTestSetContentLengthHeader() {
+  public static function providerTestSetContentLengthHeader() {
     return [
       'Informational' => [
         FALSE,
diff --git a/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php b/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php
index 244d32d617d8..dbc4e54de26f 100644
--- a/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php
+++ b/core/tests/Drupal/Tests/Core/StackMiddleware/ReverseProxyMiddlewareTest.php
@@ -68,7 +68,7 @@ class ReverseProxyMiddlewareTest extends UnitTestCase {
   /**
    * Data provider for testReverseProxyEnabled.
    */
-  public function reverseProxyEnabledProvider() {
+  public static function reverseProxyEnabledProvider() {
     return [
       'Proxy with default trusted headers' => [
         ['reverse_proxy_addresses' => ['127.0.0.2', '127.0.0.3']],
diff --git a/core/tests/Drupal/Tests/Core/StringTranslation/ByteSizeMarkupTest.php b/core/tests/Drupal/Tests/Core/StringTranslation/ByteSizeMarkupTest.php
index 64a54741ea92..a125ef27fb75 100644
--- a/core/tests/Drupal/Tests/Core/StringTranslation/ByteSizeMarkupTest.php
+++ b/core/tests/Drupal/Tests/Core/StringTranslation/ByteSizeMarkupTest.php
@@ -29,7 +29,7 @@ class ByteSizeMarkupTest extends UnitTestCase {
   /**
    * Provides a list of byte size to test.
    */
-  public function providerTestCommonFormatSize() {
+  public static function providerTestCommonFormatSize() {
     $kb = Bytes::KILOBYTE;
     return [
       ['0 bytes', 0],
diff --git a/core/tests/Drupal/Tests/Core/StringTranslation/PluralTranslatableMarkupTest.php b/core/tests/Drupal/Tests/Core/StringTranslation/PluralTranslatableMarkupTest.php
index 738c85f9f1d0..80ab6d3edae7 100644
--- a/core/tests/Drupal/Tests/Core/StringTranslation/PluralTranslatableMarkupTest.php
+++ b/core/tests/Drupal/Tests/Core/StringTranslation/PluralTranslatableMarkupTest.php
@@ -36,7 +36,7 @@ class PluralTranslatableMarkupTest extends UnitTestCase {
   /**
    * Data provider for ::testPluralTranslatableMarkupSerialization().
    */
-  public function providerPluralTranslatableMarkupSerialization() {
+  public static function providerPluralTranslatableMarkupSerialization() {
     return [
       [1, 'singular 1'],
       [2, 'plural 2'],
diff --git a/core/tests/Drupal/Tests/Core/StringTranslation/TranslationManagerTest.php b/core/tests/Drupal/Tests/Core/StringTranslation/TranslationManagerTest.php
index 8e821c67ede8..5d8f7ca9bc8a 100644
--- a/core/tests/Drupal/Tests/Core/StringTranslation/TranslationManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/StringTranslation/TranslationManagerTest.php
@@ -34,7 +34,7 @@ class TranslationManagerTest extends UnitTestCase {
    * Provides some test data for formatPlural()
    * @return array
    */
-  public function providerTestFormatPlural() {
+  public static function providerTestFormatPlural() {
     return [
       [1, 'Singular', '@count plural', [], [], 'Singular'],
       [2, 'Singular', '@count plural', [], [], '2 plural'],
@@ -88,7 +88,7 @@ class TranslationManagerTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestTranslatePlaceholder() {
+  public static function providerTestTranslatePlaceholder() {
     return [
       ['foo @bar', ['@bar' => 'bar'], 'foo bar'],
       ['bar %baz', ['%baz' => 'baz'], 'bar <em class="placeholder">baz</em>'],
diff --git a/core/tests/Drupal/Tests/Core/Template/AttributeHelperTest.php b/core/tests/Drupal/Tests/Core/Template/AttributeHelperTest.php
index c6b5ec39cd51..4590a145b44f 100644
--- a/core/tests/Drupal/Tests/Core/Template/AttributeHelperTest.php
+++ b/core/tests/Drupal/Tests/Core/Template/AttributeHelperTest.php
@@ -21,7 +21,7 @@ class AttributeHelperTest extends UnitTestCase {
    *   An array of test data each containing an array of attributes, the name
    *   of the attribute to check existence of, and the expected result.
    */
-  public function providerTestAttributeExists() {
+  public static function providerTestAttributeExists() {
     return [
       [['class' => ['example-class']], 'class', TRUE],
       [[], 'class', FALSE],
@@ -48,7 +48,7 @@ class AttributeHelperTest extends UnitTestCase {
    *   An array of test data each containing an initial attribute collection, an
    *   Attribute object or array to be merged, and the expected result.
    */
-  public function providerTestMergeCollections() {
+  public static function providerTestMergeCollections() {
     return [
       [[], ['class' => ['class1']], ['class' => ['class1']]],
       [[], new Attribute(['class' => ['class1']]), ['class' => ['class1']]],
diff --git a/core/tests/Drupal/Tests/Core/Template/AttributeTest.php b/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
index 6953c5bf25d0..4b708c239484 100644
--- a/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
+++ b/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
@@ -281,7 +281,7 @@ class AttributeTest extends UnitTestCase {
    *   An array of test data each containing of a twig template string,
    *   a resulting string of classes and an optional array of attributes.
    */
-  public function providerTestAttributeClassHelpers() {
+  public static function providerTestAttributeClassHelpers() {
     // cSpell:disable
     return [
       ["{{ attributes.class }}", ''],
@@ -364,7 +364,7 @@ class AttributeTest extends UnitTestCase {
     $this->assertEquals($expected, (new Attribute($attributes))->__toString());
   }
 
-  public function providerTestAttributeValues() {
+  public static function providerTestAttributeValues() {
     $data = [];
 
     $string = '"> <script>alert(123)</script>"';
@@ -471,7 +471,7 @@ class AttributeTest extends UnitTestCase {
    *   An array of test data each containing an array of attributes, the name
    *   of the attribute to check existence of, and the expected result.
    */
-  public function providerTestHasAttribute() {
+  public static function providerTestHasAttribute() {
     return [
       [['class' => ['example-class']], 'class', TRUE],
       [[], 'class', FALSE],
@@ -497,7 +497,7 @@ class AttributeTest extends UnitTestCase {
    *   An array of test data each containing an initial Attribute object, an
    *   Attribute object or array to be merged, and the expected result.
    */
-  public function providerTestMerge() {
+  public static function providerTestMerge() {
     return [
       [new Attribute([]), new Attribute(['class' => ['class1']]), new Attribute(['class' => ['class1']])],
       [new Attribute(['class' => ['example-class']]), new Attribute(['class' => ['class1']]), new Attribute(['class' => ['example-class', 'class1']])],
diff --git a/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php b/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
index a86dc826df80..cfa4c6ba0019 100644
--- a/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
+++ b/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
@@ -121,7 +121,7 @@ class TwigExtensionTest extends UnitTestCase {
    *   An array of test data each containing of a twig template string and
    *   a boolean expecting whether the path will be safe.
    */
-  public function providerTestEscaping() {
+  public static function providerTestEscaping() {
     return [
       ['{{ path("foo") }}', FALSE],
       ['{{ path("foo", {}) }}', FALSE],
@@ -377,7 +377,7 @@ class TwigExtensionTest extends UnitTestCase {
   /**
    * Data provider for ::testRenderVarEarlyReturn().
    */
-  public function providerTestRenderVarEarlyReturn() {
+  public static function providerTestRenderVarEarlyReturn() {
     return [
       'null' => ['', NULL],
       'empty array' => ['', []],
@@ -449,7 +449,7 @@ class TwigExtensionTest extends UnitTestCase {
    *
    * @return \Iterator
    */
-  public function providerTestTwigAddSuggestionFilter(): \Iterator {
+  public static function providerTestTwigAddSuggestionFilter(): \Iterator {
     yield 'suggestion should be added' => [
       [
         '#theme' => 'kitten',
@@ -565,7 +565,7 @@ class TwigExtensionTest extends UnitTestCase {
    *
    * @return \Iterator
    */
-  public function providerTestTwigAddClass(): \Iterator {
+  public static function providerTestTwigAddClass(): \Iterator {
     yield 'should add a class on element' => [
       ['#type' => 'container'],
       'my-class',
@@ -615,7 +615,7 @@ class TwigExtensionTest extends UnitTestCase {
    *
    * @return \Iterator
    */
-  public function providerTestTwigSetAttribute(): \Iterator {
+  public static function providerTestTwigSetAttribute(): \Iterator {
     yield 'should add attributes on element' => [
       ['#theme' => 'image'],
       'title',
diff --git a/core/tests/Drupal/Tests/Core/Template/TwigSandboxTest.php b/core/tests/Drupal/Tests/Core/Template/TwigSandboxTest.php
index bbd239406021..10c81894a445 100644
--- a/core/tests/Drupal/Tests/Core/Template/TwigSandboxTest.php
+++ b/core/tests/Drupal/Tests/Core/Template/TwigSandboxTest.php
@@ -57,7 +57,7 @@ class TwigSandboxTest extends UnitTestCase {
    *
    * @return array
    */
-  public function getTwigEntityDangerousMethods() {
+  public static function getTwigEntityDangerousMethods() {
     return [
       ['{{ entity.delete }}'],
       ['{{ entity.save }}'],
diff --git a/core/tests/Drupal/Tests/Core/Test/PhpUnitBridgeRequiresTest.php b/core/tests/Drupal/Tests/Core/Test/PhpUnitBridgeRequiresTest.php
index ccfd4a5d5fc9..cf0e731ae8e1 100644
--- a/core/tests/Drupal/Tests/Core/Test/PhpUnitBridgeRequiresTest.php
+++ b/core/tests/Drupal/Tests/Core/Test/PhpUnitBridgeRequiresTest.php
@@ -35,7 +35,7 @@ class PhpUnitBridgeRequiresTest extends UnitTestCase {
   /**
    * Data provider for ::testWillNeverRun().
    */
-  public function providerTestWillNeverRun(): array {
+  public static function providerTestWillNeverRun(): array {
     return [
       ['this_will_never_run'],
     ];
diff --git a/core/tests/Drupal/Tests/Core/Test/PhpUnitTestRunnerTest.php b/core/tests/Drupal/Tests/Core/Test/PhpUnitTestRunnerTest.php
index a1e6534a05a3..52c6e7980c29 100644
--- a/core/tests/Drupal/Tests/Core/Test/PhpUnitTestRunnerTest.php
+++ b/core/tests/Drupal/Tests/Core/Test/PhpUnitTestRunnerTest.php
@@ -99,7 +99,7 @@ class PhpUnitTestRunnerTest extends UnitTestCase {
     $this->assertStringEndsWith('phpunit-23.xml', $runner->xmlLogFilePath(23));
   }
 
-  public function providerTestSummarizeResults() {
+  public static function providerTestSummarizeResults() {
     return [
       [
         [
diff --git a/core/tests/Drupal/Tests/Core/Test/RunTests/TestFileParserTest.php b/core/tests/Drupal/Tests/Core/Test/RunTests/TestFileParserTest.php
index f4059252c11b..dbcb853143d9 100644
--- a/core/tests/Drupal/Tests/Core/Test/RunTests/TestFileParserTest.php
+++ b/core/tests/Drupal/Tests/Core/Test/RunTests/TestFileParserTest.php
@@ -14,7 +14,7 @@ use Drupal\Tests\UnitTestCase;
  */
 class TestFileParserTest extends UnitTestCase {
 
-  public function provideTestFileContents() {
+  public static function provideTestFileContents() {
     return [
       'empty' => [[], ''],
       'no-namespace' => [['ConcreteClass'],
diff --git a/core/tests/Drupal/Tests/Core/Test/TestDatabaseTest.php b/core/tests/Drupal/Tests/Core/Test/TestDatabaseTest.php
index 8412a33c1d2e..a96d79e38a66 100644
--- a/core/tests/Drupal/Tests/Core/Test/TestDatabaseTest.php
+++ b/core/tests/Drupal/Tests/Core/Test/TestDatabaseTest.php
@@ -43,7 +43,7 @@ class TestDatabaseTest extends UnitTestCase {
   /**
    * Data provider for self::testConstructor()
    */
-  public function providerTestConstructor() {
+  public static function providerTestConstructor() {
     return [
       ['test1234', 'test1234', 'sites/simpletest/1234'],
       ['test123456test234567', 'test123456test234567', 'sites/simpletest/234567'],
diff --git a/core/tests/Drupal/Tests/Core/Test/TestDiscoveryTest.php b/core/tests/Drupal/Tests/Core/Test/TestDiscoveryTest.php
index bff678550fb2..9b9053c3ba86 100644
--- a/core/tests/Drupal/Tests/Core/Test/TestDiscoveryTest.php
+++ b/core/tests/Drupal/Tests/Core/Test/TestDiscoveryTest.php
@@ -29,7 +29,7 @@ class TestDiscoveryTest extends UnitTestCase {
     $this->assertEquals($expected, $info);
   }
 
-  public function infoParserProvider() {
+  public static function infoParserProvider() {
     // A module provided unit test.
     $tests[] = [
       // Expected result.
@@ -447,7 +447,7 @@ EOF;
     $this->assertEquals($expected, TestDiscovery::getPhpunitTestSuite($classname));
   }
 
-  public function providerTestGetPhpunitTestSuite() {
+  public static function providerTestGetPhpunitTestSuite() {
     $data = [];
     $data['simpletest-web test'] = ['\Drupal\rest\Tests\NodeTest', FALSE];
     $data['module-unittest'] = [static::class, 'Unit'];
diff --git a/core/tests/Drupal/Tests/Core/Test/XdebugRequestTraitTest.php b/core/tests/Drupal/Tests/Core/Test/XdebugRequestTraitTest.php
index d2dc38ba58f4..7525b074b532 100644
--- a/core/tests/Drupal/Tests/Core/Test/XdebugRequestTraitTest.php
+++ b/core/tests/Drupal/Tests/Core/Test/XdebugRequestTraitTest.php
@@ -40,7 +40,7 @@ class XdebugRequestTraitTest extends UnitTestCase {
    * @return iterable
    *   Test scenarios.
    */
-  public function extractCookiesDataProvider() {
+  public static function extractCookiesDataProvider() {
     yield 'no XDEBUG_CONFIG' => [[], []];
     yield 'empty string XDEBUG_CONFIG' => [['XDEBUG_CONFIG' => ''], []];
     yield 'only space string XDEBUG_CONFIG' => [['XDEBUG_CONFIG' => ' '], []];
diff --git a/core/tests/Drupal/Tests/Core/Theme/AjaxBasePageNegotiatorTest.php b/core/tests/Drupal/Tests/Core/Theme/AjaxBasePageNegotiatorTest.php
index 06dea22a55c7..612dbb107973 100644
--- a/core/tests/Drupal/Tests/Core/Theme/AjaxBasePageNegotiatorTest.php
+++ b/core/tests/Drupal/Tests/Core/Theme/AjaxBasePageNegotiatorTest.php
@@ -68,7 +68,7 @@ class AjaxBasePageNegotiatorTest extends UnitTestCase {
     $this->assertSame($expected, $result);
   }
 
-  public function providerTestApplies() {
+  public static function providerTestApplies() {
     $data = [];
     $data['empty'] = [[], FALSE];
     $data['no_theme'] = [['ajax_page_state' => ['theme' => '', 'theme_token' => '']], FALSE];
diff --git a/core/tests/Drupal/Tests/Core/Theme/RegistryTest.php b/core/tests/Drupal/Tests/Core/Theme/RegistryTest.php
index abec03963a76..9a4ecb89b61f 100644
--- a/core/tests/Drupal/Tests/Core/Theme/RegistryTest.php
+++ b/core/tests/Drupal/Tests/Core/Theme/RegistryTest.php
@@ -218,7 +218,7 @@ class RegistryTest extends UnitTestCase {
   /**
    * Provides test data to ::testPostProcessExtension().
    */
-  public function providerTestPostProcessExtension() {
+  public static function providerTestPostProcessExtension() {
     // This is test data for unit testing
     // \Drupal\Core\Theme\Registry::postProcessExtension(), not what happens
     // before it. Therefore, for all test data:
diff --git a/core/tests/Drupal/Tests/Core/Transliteration/PhpTransliterationTest.php b/core/tests/Drupal/Tests/Core/Transliteration/PhpTransliterationTest.php
index a1f39fc1fc20..b395c49ed9ff 100644
--- a/core/tests/Drupal/Tests/Core/Transliteration/PhpTransliterationTest.php
+++ b/core/tests/Drupal/Tests/Core/Transliteration/PhpTransliterationTest.php
@@ -63,7 +63,7 @@ class PhpTransliterationTest extends UnitTestCase {
    *
    * @return array
    */
-  public function providerTestPhpTransliterationWithAlter() {
+  public static function providerTestPhpTransliterationWithAlter() {
     $random_generator = new Random();
     $random = $random_generator->string(10);
     // Make some strings with two, three, and four-byte characters for testing.
diff --git a/core/tests/Drupal/Tests/Core/UnroutedUrlTest.php b/core/tests/Drupal/Tests/Core/UnroutedUrlTest.php
index 6cd4baad895b..c2cda9eaa94b 100644
--- a/core/tests/Drupal/Tests/Core/UnroutedUrlTest.php
+++ b/core/tests/Drupal/Tests/Core/UnroutedUrlTest.php
@@ -78,7 +78,7 @@ class UnroutedUrlTest extends UnitTestCase {
   /**
    * Data provider for testFromUri().
    */
-  public function providerFromUri() {
+  public static function providerFromUri() {
     return [
       // [$uri, $is_external]
       // An external URI.
@@ -112,7 +112,7 @@ class UnroutedUrlTest extends UnitTestCase {
   /**
    * Data provider for testFromInvalidUri().
    */
-  public function providerFromInvalidUri() {
+  public static function providerFromInvalidUri() {
     return [
       // Schemeless paths.
       ['test'],
diff --git a/core/tests/Drupal/Tests/Core/UrlTest.php b/core/tests/Drupal/Tests/Core/UrlTest.php
index 84115cd8e0df..b5ba9987532f 100644
--- a/core/tests/Drupal/Tests/Core/UrlTest.php
+++ b/core/tests/Drupal/Tests/Core/UrlTest.php
@@ -543,7 +543,7 @@ class UrlTest extends UnitTestCase {
   /**
    * Data provider for testing entity URIs.
    */
-  public function providerTestEntityUris() {
+  public static function providerTestEntityUris() {
     return [
       [
         'entity:test_entity/1',
@@ -645,7 +645,7 @@ class UrlTest extends UnitTestCase {
   /**
    * Data provider for testing string entity URIs.
    */
-  public function providerTestToUriStringForEntity() {
+  public static function providerTestToUriStringForEntity() {
     return [
       ['entity:test_entity/1', [], 'route:entity.test_entity.canonical;test_entity=1'],
       ['entity:test_entity/1', ['fragment' => 'top', 'query' => ['page' => '2']], 'route:entity.test_entity.canonical;test_entity=1?page=2#top'],
@@ -676,7 +676,7 @@ class UrlTest extends UnitTestCase {
   /**
    * Data provider for testing internal URIs.
    */
-  public function providerTestToUriStringForInternal() {
+  public static function providerTestToUriStringForInternal() {
     return [
       // The four permutations of a regular path.
       ['internal:/test-entity/1', [], 'route:entity.test_entity.canonical;test_entity=1'],
@@ -712,7 +712,7 @@ class UrlTest extends UnitTestCase {
   /**
    * Data provider for testFromValidInternalUri().
    */
-  public function providerFromValidInternalUri() {
+  public static function providerFromValidInternalUri() {
     return [
       // Normal paths with a leading slash.
       ['/kittens'],
@@ -752,7 +752,7 @@ class UrlTest extends UnitTestCase {
   /**
    * Data provider for testFromInvalidInternalUri().
    */
-  public function providerFromInvalidInternalUri() {
+  public static function providerFromInvalidInternalUri() {
     return [
       // Normal paths without a leading slash.
       'normal_path0' => ['kittens'],
@@ -799,7 +799,7 @@ class UrlTest extends UnitTestCase {
   /**
    * Data provider for testing route: URIs.
    */
-  public function providerTestToUriStringForRoute() {
+  public static function providerTestToUriStringForRoute() {
     return [
       ['route:entity.test_entity.canonical;test_entity=1', [], 'route:entity.test_entity.canonical;test_entity=1'],
       ['route:entity.test_entity.canonical;test_entity=1', ['fragment' => 'top', 'query' => ['page' => '2']], 'route:entity.test_entity.canonical;test_entity=1?page=2#top'],
@@ -844,7 +844,7 @@ class UrlTest extends UnitTestCase {
   /**
    * Data provider for the access test methods.
    */
-  public function accessProvider() {
+  public static function accessProvider() {
     return [
       [TRUE],
       [FALSE],
diff --git a/core/tests/Drupal/Tests/Core/Utility/CallableResolverTest.php b/core/tests/Drupal/Tests/Core/Utility/CallableResolverTest.php
index 5df85c607362..66da0ca7eda6 100644
--- a/core/tests/Drupal/Tests/Core/Utility/CallableResolverTest.php
+++ b/core/tests/Drupal/Tests/Core/Utility/CallableResolverTest.php
@@ -128,7 +128,7 @@ class CallableResolverTest extends UnitTestCase {
   /**
    * Test cases for ::testCallbackResolverExceptionHandling.
    */
-  public function callableResolverExceptionHandlingTestCases() {
+  public static function callableResolverExceptionHandlingTestCases() {
     return [
       'String function' => [
         'not_a_callable',
diff --git a/core/tests/Drupal/Tests/Core/Utility/LinkGeneratorTest.php b/core/tests/Drupal/Tests/Core/Utility/LinkGeneratorTest.php
index 33981539ddc9..46a6ac0d4298 100644
--- a/core/tests/Drupal/Tests/Core/Utility/LinkGeneratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Utility/LinkGeneratorTest.php
@@ -91,7 +91,7 @@ class LinkGeneratorTest extends UnitTestCase {
    * @return array
    *   Returns some test data.
    */
-  public function providerTestGenerateHrefs() {
+  public static function providerTestGenerateHrefs() {
     return [
       // Test that the URL returned by the URL generator is used.
       ['test_route_1', [], FALSE, '/test-route-1'],
diff --git a/core/tests/Drupal/Tests/Core/Utility/PhpRequirementsTest.php b/core/tests/Drupal/Tests/Core/Utility/PhpRequirementsTest.php
index af857527c2cc..f91417a7b8f6 100644
--- a/core/tests/Drupal/Tests/Core/Utility/PhpRequirementsTest.php
+++ b/core/tests/Drupal/Tests/Core/Utility/PhpRequirementsTest.php
@@ -86,7 +86,7 @@ class PhpRequirementsTest extends UnitTestCase {
    * @return \Generator
    *   Test scenarios.
    */
-  public function providerMinimumSupportedPhp(): \Generator {
+  public static function providerMinimumSupportedPhp(): \Generator {
     $eol_lists = [];
 
     // Test against the known valid data from 9.0.0 to 9.3.0.
diff --git a/core/tests/Drupal/Tests/Core/Utility/TokenTest.php b/core/tests/Drupal/Tests/Core/Utility/TokenTest.php
index 7b5864b7b556..538e13aa27a5 100644
--- a/core/tests/Drupal/Tests/Core/Utility/TokenTest.php
+++ b/core/tests/Drupal/Tests/Core/Utility/TokenTest.php
@@ -279,7 +279,7 @@ class TokenTest extends UnitTestCase {
     $this->assertEquals($expected, $result);
   }
 
-  public function providerTestReplaceEscaping() {
+  public static function providerTestReplaceEscaping() {
     $data = [];
 
     // No tokens. The first argument to Token::replace() should not be escaped.
diff --git a/core/tests/Drupal/Tests/Core/Utility/UnroutedUrlAssemblerTest.php b/core/tests/Drupal/Tests/Core/Utility/UnroutedUrlAssemblerTest.php
index 9f354d61b58e..a1a6aed5c92a 100644
--- a/core/tests/Drupal/Tests/Core/Utility/UnroutedUrlAssemblerTest.php
+++ b/core/tests/Drupal/Tests/Core/Utility/UnroutedUrlAssemblerTest.php
@@ -89,7 +89,7 @@ class UnroutedUrlAssemblerTest extends UnitTestCase {
   /**
    * Provides test data for testAssembleWithExternalUrl.
    */
-  public function providerTestAssembleWithExternalUrl() {
+  public static function providerTestAssembleWithExternalUrl() {
     return [
       ['http://example.com/test', [], 'http://example.com/test'],
       ['http://example.com/test', ['fragment' => 'example'], 'http://example.com/test#example'],
@@ -122,7 +122,7 @@ class UnroutedUrlAssemblerTest extends UnitTestCase {
   /**
    * @return array
    */
-  public function providerTestAssembleWithLocalUri() {
+  public static function providerTestAssembleWithLocalUri() {
     return [
       ['base:example', [], FALSE, '/example'],
       ['base:example', ['query' => ['foo' => 'bar']], FALSE, '/example?foo=bar'],