diff --git a/core/modules/system/tests/modules/test_page_test/src/Controller/Test.php b/core/modules/system/tests/modules/test_page_test/src/Controller/Test.php
index 7bb0fb1..7ec5fc0 100644
--- a/core/modules/system/tests/modules/test_page_test/src/Controller/Test.php
+++ b/core/modules/system/tests/modules/test_page_test/src/Controller/Test.php
@@ -98,4 +98,14 @@ public function renderEncodedMarkup() {
     return ['#plain_text' => 'Bad html <script>alert(123);</script>'];
   }
 
+  /**
+   * Renders a page with pipe character in link test.
+   *
+   * @return array
+   *   A render array as expected by drupal_render()
+   */
+  public function renderPipeInLink() {
+    return ['#markup' => '<a href="http://example.com">foo|bar|baz</a>'];
+  }
+
 }
diff --git a/core/modules/system/tests/modules/test_page_test/test_page_test.routing.yml b/core/modules/system/tests/modules/test_page_test/test_page_test.routing.yml
index cbcf6d8..9d07a34 100644
--- a/core/modules/system/tests/modules/test_page_test/test_page_test.routing.yml
+++ b/core/modules/system/tests/modules/test_page_test/test_page_test.routing.yml
@@ -66,3 +66,11 @@ test_page_test.encoded:
     _controller: '\Drupal\test_page_test\Controller\Test::renderEncodedMarkup'
   requirements:
     _access: 'TRUE'
+
+test_page_test.pipe:
+  path: '/test-pipe-char'
+  defaults:
+    _title: 'Page with pipe char in link'
+    _controller: '\Drupal\test_page_test\Controller\Test::renderPipeInLink'
+  requirements:
+    _access: 'TRUE'
diff --git a/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php b/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
index b0a53dd..c53647c 100644
--- a/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
+++ b/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
@@ -113,6 +113,16 @@ public function testError() {
   }
 
   /**
+   * Tests linkExists() with pipe character (|) in locator.
+   *
+   * @see \Drupal\Tests\WebAssert::linkExists()
+   */
+  public function testPipeCharInLocator() {
+    $this->drupalGet('test-pipe-char');
+    $this->assertSession()->linkExists('foo|bar|baz');
+  }
+
+  /**
    * Tests legacy asserts.
    */
   public function testLegacyAsserts() {