Fatal error: Uncaught Error: Class "Drupal\Tests\rest\Functional\ResourceTestBase" not found in /home/qcsvlel/www/core/modules/rest/tests/src/Functional/FileUploadResourceTestBase.php:27 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/rest/tests/src/Functional/FileUploadResourceTestBase.php on line 27