diff --git a/core/drupalci.yml b/core/drupalci.yml
index 413272eff3..53c824e136 100644
--- a/core/drupalci.yml
+++ b/core/drupalci.yml
@@ -7,43 +7,10 @@
 build:
   assessment:
     testing:
-      # Run code quality checks.
-      container_command.commit-checks:
-        commands:
-          - "core/scripts/dev/commit-code-check.sh --drupalci"
-        halt-on-fail: true
-      # run_tests task is executed several times in order of performance speeds.
-      # halt-on-fail can be set on the run_tests tasks in order to fail fast.
-      # suppress-deprecations is false in order to be alerted to usages of
-      # deprecated code.
-      run_tests.phpunit:
-        types: 'PHPUnit-Unit'
-        testgroups: '--all'
-        suppress-deprecations: false
-        halt-on-fail: false
-      run_tests.kernel:
-        types: 'PHPUnit-Kernel'
-        testgroups: '--all'
-        suppress-deprecations: false
-        halt-on-fail: false
-      run_tests.build:
-        # Limit concurrency due to disk space concerns.
-        concurrency: 15
-        types: 'PHPUnit-Build'
-        testgroups: '--all'
-        suppress-deprecations: false
-        halt-on-fail: false
-      run_tests.functional:
-        types: 'PHPUnit-Functional'
-        testgroups: '--all'
-        suppress-deprecations: false
-        halt-on-fail: false
       run_tests.javascript:
         concurrency: 15
         types: 'PHPUnit-FunctionalJavascript'
-        testgroups: '--all'
+        testgroups: '--class "\Drupal\Tests\ckeditor5\FunctionalJavascript\MediaLibraryTest"'
         suppress-deprecations: false
         halt-on-fail: false
-      # Run nightwatch testing.
-      # @see https://www.drupal.org/project/drupal/issues/2869825
-      nightwatchjs: {}
+        repeat: 50
diff --git a/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaLibraryTest.php b/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaLibraryTest.php
index 31bb0e94f9..4552daf7ed 100644
--- a/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaLibraryTest.php
+++ b/core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaLibraryTest.php
@@ -146,7 +146,6 @@ function (ConstraintViolation $v) {
    * Tests using drupalMedia button to embed media into CKEditor 5.
    */
   public function testButton() {
-    $this->markTestSkipped();
     $media_preview_selector = '.ck-content .ck-widget.drupal-media .media';
     $this->drupalGet('/node/add/blog');
     $this->waitForEditor();
@@ -194,7 +193,8 @@ public function testButton() {
     $this->drupalGet('/node/add/blog');
     $this->waitForEditor();
     $this->pressEditorButton('Insert Drupal Media');
-    $assert_session->waitForElement('css', '.js-media-library-item')->click();
+    $this->assertNotEmpty($assert_session->waitForId('drupal-modal'));
+    $assert_session->elementExists('css', '.js-media-library-item')->click();
     $assert_session->elementExists('css', '.ui-dialog-buttonpane')->pressButton('Insert selected');
     $this->assertNotEmpty($assert_session->waitForElementVisible('css', $media_preview_selector, 1000));
     $xpath = new \DOMXPath($this->getEditorDataAsDom());