Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in C:\xampp\htdocs\extensions\Math\tests\phpunit\MathLaTeXMLCacheTest.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\Math\tests\phpunit\MathLaTeXMLCacheTest.php on line 12