Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /users/energydata/www/volkszaehler.org/vendor/andig/php-shunting-yard/tests/ScannerTest.php:9 Stack trace: #0 {main} thrown in /users/energydata/www/volkszaehler.org/vendor/andig/php-shunting-yard/tests/ScannerTest.php on line 9