Fatal error: Uncaught Error: Class "Drupal\FunctionalJavascriptTests\PerformanceTestBase" not found in /home/qcsvlel/www/core/profiles/standard/tests/src/FunctionalJavascript/StandardPerformanceTest.php:24 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/profiles/standard/tests/src/FunctionalJavascript/StandardPerformanceTest.php on line 24