diff --git a/tests/src/Kernel/CKEditor5PluginManagerTest.php b/tests/src/Kernel/CKEditor5PluginManagerTest.php
index 1bca03a..88ffa01 100644
--- a/tests/src/Kernel/CKEditor5PluginManagerTest.php
+++ b/tests/src/Kernel/CKEditor5PluginManagerTest.php
@@ -333,10 +333,10 @@ YAML,
     ];
     $this->assertSame($default_plugins, $definitions, 'No CKEditor 5 plugins found besides the built-in ones.');
     $default_libraries = [
-      'ckeditor5/ckeditor5.basic',
-      'ckeditor5/ckeditor5.internal',
       'ckeditor5/drupal.ckeditor5',
-      'ckeditor5/drupal.ckeditor5.emphasis',
+      'core/ckeditor5.basic',
+      'core/ckeditor5.internal',
+      'core/drupal.ckeditor5.emphasis',
     ];
     $this->assertSame($default_libraries, $this->manager->getEnabledLibraries($editor));
 
@@ -362,9 +362,9 @@ YAML,
     // Sort on plugin id.
     asort($default_plugins_with_layercake);
     $this->assertSame(array_values($default_plugins_with_layercake), $plugin_ids);
-    $this->assertSame(array_merge($default_libraries, [
-      'ckeditor5_test/layercake',
-    ]), $this->manager->getEnabledLibraries($editor));
+    $default_libraries_with_layercake = array_merge($default_libraries, ['ckeditor5_test/layercake']);
+    sort($default_libraries_with_layercake);
+    $this->assertSame($default_libraries_with_layercake, $this->manager->getEnabledLibraries($editor));
 
     // Enable media embed filter which the CKEditor 5 media plugin requires.
     $editor->getFilterFormat()->setFilterConfig('media_embed', ['status' => TRUE])->save();
@@ -378,10 +378,12 @@ YAML,
     ]);
     sort($expected_plugins);
     $this->assertSame($expected_plugins, $plugin_ids);
-    $this->assertSame(array_merge($default_libraries, [
+    $expected_libraries = array_merge($default_libraries, [
       'ckeditor5/drupal.ckeditor5.media',
       'ckeditor5_test/layercake',
-    ]), $this->manager->getEnabledLibraries($editor));
+    ]);
+    sort($expected_libraries);
+    $this->assertSame($expected_libraries, $this->manager->getEnabledLibraries($editor));
 
     // Case 5: GHS is only enabled for Full HTML (or any other text format that
     // has no TYPE_HTML_RESTRICTOR filters).
@@ -397,11 +399,11 @@ YAML,
     ];
     $this->assertSame($default_plugins, $definitions, 'No CKEditor 5 plugins found besides the built-in ones.');
     $default_libraries = [
-      'ckeditor5/ckeditor5.basic',
-      'ckeditor5/ckeditor5.htmlSupport',
-      'ckeditor5/ckeditor5.internal',
       'ckeditor5/drupal.ckeditor5',
-      'ckeditor5/drupal.ckeditor5.emphasis',
+      'core/ckeditor5.basic',
+      'core/ckeditor5.htmlSupport',
+      'core/ckeditor5.internal',
+      'core/drupal.ckeditor5.emphasis',
     ];
     $this->assertSame($default_libraries, $this->manager->getEnabledLibraries($editor));
   }