Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/dev.hallescherfc.de/vendor/unzerdev/php-sdk/test/unit/Services/EnvironmentServiceTest.php:17 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/unzerdev/php-sdk/test/unit/Services/EnvironmentServiceTest.php on line 17