diff --git a/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php b/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
index cae88dfca4f..82e98d91a89 100644
--- a/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
+++ b/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
@@ -221,7 +221,7 @@ class BrowserTestBaseTest extends BrowserTestBase {
   public function testInvalidLinkExistsExact() {
     $this->drupalGet('test-pipe-char');
     $this->expectException(ExpectationException::class);
-    $this->expectExceptionMessage('Link with label foo|bar found');
+    $this->expectExceptionMessage('Link with label foo|bar not found');
     $this->assertSession()->linkExistsExact('foo|bar');
   }
 
@@ -253,7 +253,7 @@ class BrowserTestBaseTest extends BrowserTestBase {
   public function testInvalidLinkNotExistsExact() {
     $this->drupalGet('test-pipe-char');
     $this->expectException(ExpectationException::class);
-    $this->expectExceptionMessage('Link with label foo|bar|baz not found');
+    $this->expectExceptionMessage('Link with label foo|bar|baz found');
     $this->assertSession()->linkNotExistsExact('foo|bar|baz');
   }
 
diff --git a/core/tests/Drupal/Tests/WebAssert.php b/core/tests/Drupal/Tests/WebAssert.php
index f76c0790ae7..427a0a04964 100644
--- a/core/tests/Drupal/Tests/WebAssert.php
+++ b/core/tests/Drupal/Tests/WebAssert.php
@@ -294,7 +294,7 @@ class WebAssert extends MinkWebAssert {
    *   Thrown when element doesn't exist, or the link label is a different one.
    */
   public function linkExists($label, $index = 0, $message = '') {
-    $message = ($message ? $message : strtr('Link with label %label found.', ['%label' => $label]));
+    $message = ($message ? $message : strtr('Link with label %label not found.', ['%label' => $label]));
     $links = $this->session->getPage()->findAll('named', ['link', $label]);
     $this->assert(!empty($links[$index]), $message);
   }
@@ -317,7 +317,7 @@ class WebAssert extends MinkWebAssert {
    *   Thrown when element doesn't exist, or the link label is a different one.
    */
   public function linkExistsExact($label, $index = 0, $message = '') {
-    $message = ($message ? $message : strtr('Link with label %label found.', ['%label' => $label]));
+    $message = ($message ? $message : strtr('Link with label %label not found.', ['%label' => $label]));
     $links = $this->session->getPage()->findAll('named_exact', ['link', $label]);
     $this->assert(!empty($links[$index]), $message);
   }
@@ -338,7 +338,7 @@ class WebAssert extends MinkWebAssert {
    *   Thrown when element doesn't exist, or the link label is a different one.
    */
   public function linkNotExists($label, $message = '') {
-    $message = ($message ? $message : strtr('Link with label %label not found.', ['%label' => $label]));
+    $message = ($message ? $message : strtr('Link with label %label found.', ['%label' => $label]));
     $links = $this->session->getPage()->findAll('named', ['link', $label]);
     $this->assert(empty($links), $message);
   }
@@ -359,7 +359,7 @@ class WebAssert extends MinkWebAssert {
    *   Thrown when element doesn't exist, or the link label is a different one.
    */
   public function linkNotExistsExact($label, $message = '') {
-    $message = ($message ? $message : strtr('Link with label %label not found.', ['%label' => $label]));
+    $message = ($message ? $message : strtr('Link with label %label found.', ['%label' => $label]));
     $links = $this->session->getPage()->findAll('named_exact', ['link', $label]);
     $this->assert(empty($links), $message);
   }
@@ -382,7 +382,7 @@ class WebAssert extends MinkWebAssert {
    */
   public function linkByHrefExists($href, $index = 0, $message = '') {
     $xpath = $this->buildXPathQuery('//a[contains(@href, :href)]', [':href' => $href]);
-    $message = ($message ? $message : strtr('Link containing href %href found.', ['%href' => $href]));
+    $message = ($message ? $message : strtr('No link containing href %href found.', ['%href' => $href]));
     $links = $this->session->getPage()->findAll('xpath', $xpath);
     $this->assert(!empty($links[$index]), $message);
   }
@@ -403,7 +403,7 @@ class WebAssert extends MinkWebAssert {
    */
   public function linkByHrefNotExists($href, $message = '') {
     $xpath = $this->buildXPathQuery('//a[contains(@href, :href)]', [':href' => $href]);
-    $message = ($message ? $message : strtr('No link containing href %href found.', ['%href' => $href]));
+    $message = ($message ? $message : strtr('Link containing href %href found.', ['%href' => $href]));
     $links = $this->session->getPage()->findAll('xpath', $xpath);
     $this->assert(empty($links), $message);
   }