Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in /var/www/html/orian-wiki/extensions/TemplateData/tests/phpunit/SerializationTest.php:9 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/extensions/TemplateData/tests/phpunit/SerializationTest.php on line 9