Fatal error: Uncaught Error: Class "MediaWikiUnitTestCase" not found in C:\xampp\htdocs\extensions\Math\tests\phpunit\unit\WikiTexVC\Nodes\Fun2nbTest.php:14 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\Math\tests\phpunit\unit\WikiTexVC\Nodes\Fun2nbTest.php on line 14