Fatal error: Uncaught Error: Class "Drupal\Tests\quickedit\Kernel\QuickEditTestBase" not found in /home/www/drupal8/test/core/modules/quickedit/tests/src/Kernel/EditorSelectionTest.php:13 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/quickedit/tests/src/Kernel/EditorSelectionTest.php on line 13