Fatal error: Uncaught Error: Class "Drupal\Tests\contact\Functional\Rest\MessageResourceTestBase" not found in /home/www/drupal8/test/core/modules/contact/tests/src/Functional/Hal/MessageHalJsonAnonTest.php:12 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/contact/tests/src/Functional/Hal/MessageHalJsonAnonTest.php on line 12