Fatal error: Uncaught Error: Class "Drupal\Tests\BrowserTestBase" not found in /home/qcsvlel/www/core/modules/jsonapi/tests/src/Functional/InternalEntitiesTest.php:22 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/jsonapi/tests/src/Functional/InternalEntitiesTest.php on line 22