Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/extensions/SemanticMediaWiki/tests/phpunit/Maintenance/PurgeEntityCacheTest.php:23 Stack trace: #0 {main} thrown in /var/www/html/extensions/SemanticMediaWiki/tests/phpunit/Maintenance/PurgeEntityCacheTest.php on line 23