diff --git a/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php b/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
index b545f711827..bd7c828caf8 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
@@ -15,6 +15,8 @@ use Zumba\Mink\Driver\PhantomJSDriver;
  * Use \Drupal\FunctionalJavascriptTests\WebDriverTestBase instead
  *
  * @see https://www.drupal.org/node/2945059
+ *
+ * @ingroup testing
  */
 abstract class JavascriptTestBase extends WebDriverTestBase {
 
diff --git a/core/tests/Drupal/FunctionalJavascriptTests/WebDriverTestBase.php b/core/tests/Drupal/FunctionalJavascriptTests/WebDriverTestBase.php
index 48b375e9c7a..8a9065168fb 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/WebDriverTestBase.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/WebDriverTestBase.php
@@ -11,6 +11,8 @@ use Zumba\Mink\Driver\PhantomJSDriver;
  * Runs a browser test using a driver that supports Javascript.
  *
  * Base class for testing browser interaction implemented in JavaScript.
+ *
+ * @ingroup testing
  */
 abstract class WebDriverTestBase extends BrowserTestBase {
 
diff --git a/core/tests/Drupal/KernelTests/KernelTestBase.php b/core/tests/Drupal/KernelTests/KernelTestBase.php
index ffee50a70d7..e1987ab0533 100644
--- a/core/tests/Drupal/KernelTests/KernelTestBase.php
+++ b/core/tests/Drupal/KernelTests/KernelTestBase.php
@@ -66,6 +66,8 @@ use org\bovigo\vfs\visitor\vfsStreamPrintVisitor;
  * @see \Drupal\Tests\KernelTestBase::installEntitySchema()
  * @see \Drupal\Tests\KernelTestBase::installSchema()
  * @see \Drupal\Tests\BrowserTestBase
+ *
+ * @ingroup testing
  */
 abstract class KernelTestBase extends TestCase implements ServiceProviderInterface {