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