Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/palabrebel/www/kimai/vendor/easybill/zugferd-php/tests/zugferd10/Tests/ReaderTest.php:20 Stack trace: #0 {main} thrown in /home/palabrebel/www/kimai/vendor/easybill/zugferd-php/tests/zugferd10/Tests/ReaderTest.php on line 20