Fatal error: Uncaught Error: Undefined constant "DRUPAL_ROOT" in /home/qcsvlel/www/core/tests/Drupal/KernelTests/Core/Extension/LegacyRequirementSeverityTest.php:9 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/tests/Drupal/KernelTests/Core/Extension/LegacyRequirementSeverityTest.php on line 9