Fatal error: Uncaught Error: Class 'OxidEsales\TestingLibrary\UnitTestCase' not found in /www/shop/vendor/oxid-esales/oxideshop-ce/tests/Integration/User/UserTestCase.php:12 Stack trace: #0 /www/shop/vendor/oxid-esales/oxideshop-ce/tests/Integration/User/RegistrationTest.php(15): require_once() #1 {main} thrown in /www/shop/vendor/oxid-esales/oxideshop-ce/tests/Integration/User/UserTestCase.php on line 12