Fatal error: Uncaught Error: Class 'Makaira\OxidConnectEssential\Test\Integration\IntegrationTestCase' not found in /www/shop/vendor/makaira/oxid-connect-essential/tests/Integration/Service/CartServiceTest.php:13 Stack trace: #0 {main} thrown in /www/shop/vendor/makaira/oxid-connect-essential/tests/Integration/Service/CartServiceTest.php on line 13