Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in /var/www/html/w/extensions/VisualEditor/editcheck/tests/phpunit/integration/EditCheckHooksTest.php:18 Stack trace: #0 {main} thrown in /var/www/html/w/extensions/VisualEditor/editcheck/tests/phpunit/integration/EditCheckHooksTest.php on line 18