Fatal error: Uncaught Error: Class "MediaWikiUnitTestCase" not found in /var/www/html/extensions/Math/tests/phpunit/unit/WikiTexVC/Nodes/Fun1Test.php:19 Stack trace: #0 {main} thrown in /var/www/html/extensions/Math/tests/phpunit/unit/WikiTexVC/Nodes/Fun1Test.php on line 19