Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/extensions/Math/tests/phpunit/unit/WikiTexVC/MMLmappings/BaseParsingTest.php:14 Stack trace: #0 {main} thrown in /var/www/html/extensions/Math/tests/phpunit/unit/WikiTexVC/MMLmappings/BaseParsingTest.php on line 14