Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in /var/www/html/w/tests/phpunit/integration/includes/EditPage/Constraint/EditFilterMergedContentHookConstraintTest.php:23 Stack trace: #0 {main} thrown in /var/www/html/w/tests/phpunit/integration/includes/EditPage/Constraint/EditFilterMergedContentHookConstraintTest.php on line 23