Fatal error: Uncaught Error: Class "MediaWiki\Tests\OutputTransform\OutputTransformStageTestBase" not found in /var/www/html/w/tests/phpunit/includes/OutputTransform/Stages/ExpandRelativeAttrsTest.php:22 Stack trace: #0 {main} thrown in /var/www/html/w/tests/phpunit/includes/OutputTransform/Stages/ExpandRelativeAttrsTest.php on line 22