Fatal error: Uncaught Error: Class 'OxidTestCase' not found in /www/shop/vendor/payone-gmbh/oxid-6/tests/lib/OxidTestCaseCompatibilityWrapper.php:3 Stack trace: #0 /www/shop/vendor/payone-gmbh/oxid-6/tests/additional.inc.php(3): include_once() #1 {main} thrown in /www/shop/vendor/payone-gmbh/oxid-6/tests/lib/OxidTestCaseCompatibilityWrapper.php on line 3