Fatal error: Uncaught Error: Class "Drupal\Tests\UnitTestCase" not found in /home/www/drupal8/test/core/modules/quickedit/tests/src/Unit/Access/QuickEditEntityFieldAccessCheckTest.php:17 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/quickedit/tests/src/Unit/Access/QuickEditEntityFieldAccessCheckTest.php on line 17