Fatal error: Uncaught Error: Class "Drupal\Tests\rdf\Functional\Rest\RdfMappingResourceTestBase" not found in /home/www/drupal8/test/core/modules/rest/tests/src/Functional/EntityResource/RdfMapping/RdfMappingResourceTestBase.php:15 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/rest/tests/src/Functional/EntityResource/RdfMapping/RdfMappingResourceTestBase.php on line 15