Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\Tests\ContainerAwareEventDispatcherTest" not found in /home/www/drupal8/test/core/tests/Drupal/Tests/Component/EventDispatcher/ContainerAwareEventDispatcherTest.php:27 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/tests/Drupal/Tests/Component/EventDispatcher/ContainerAwareEventDispatcherTest.php on line 27