Drupal test run --------------- All tests will run. Test run started: Thursday, May 28, 2015 - 19:39 Test summary ------------ Drupal\comment\Tests\CommentStatisticsTest 96 passes 2 fails FATAL Drupal\migrate_drupal\Tests\d6\MigrateFieldTest: test runner returned a non-zero error code (139). - Found database prefix 'simpletest134450' for test ID 660. Drupal\system\Tests\Module\InstallUninstallTest 1408 passes 19 fails Fatal error: Cannot use Symfony\Component\Validator\Constraints\Null as Null because 'Null' is a special class name in /home/berdir/Projekte/d8/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/NullConstraint.php on line 10 FATAL Drupal\system\Tests\TypedData\TypedDataTest: test runner returned a non-zero error code (255). - Found database prefix 'simpletest617798' for test ID 1485. [28-May-2015 19:59:52 UTC] PHP Fatal error: Cannot use Symfony\Component\Validator\Constraints\Null as Null because 'Null' is a special class name in /home/berdir/Projekte/d8/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/NullConstraint.php on line 10 - Removed test site directory. - Removed 2 leftover tables. Test run duration: 26 min 18 sec