Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in /var/www/html/extensions/FlaggedRevs/tests/phpunit/integration/DiffHeaderHandlerTest.php:14 Stack trace: #0 {main} thrown in /var/www/html/extensions/FlaggedRevs/tests/phpunit/integration/DiffHeaderHandlerTest.php on line 14