Fatal error: Uncaught Error: Class "Drupal\FunctionalJavascriptTests\PerformanceTestBase" not found in /home/qcsvlel/www/core/modules/navigation/tests/src/FunctionalJavascript/PerformanceTest.php:21 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/navigation/tests/src/FunctionalJavascript/PerformanceTest.php on line 21