Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in /var/www/html/w/extensions/Scribunto/tests/phpunit/Engines/LuaCommon/UstringLibraryPhpTest.php:13 Stack trace: #0 {main} thrown in /var/www/html/w/extensions/Scribunto/tests/phpunit/Engines/LuaCommon/UstringLibraryPhpTest.php on line 13