Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/extensions/SemanticMediaWiki/tests/phpunit/Schema/SchemaFinderTest.php:20 Stack trace: #0 {main} thrown in /var/www/html/extensions/SemanticMediaWiki/tests/phpunit/Schema/SchemaFinderTest.php on line 20