Fatal error: Uncaught Error: Interface 'Psr\Container\ContainerInterface' not found in /www/shop/vendor/oxid-esales/oxideshop-ce/tests/Unit/Internal/Container/DataObject/DIConfigWrapperTest.php:18 Stack trace: #0 {main} thrown in /www/shop/vendor/oxid-esales/oxideshop-ce/tests/Unit/Internal/Container/DataObject/DIConfigWrapperTest.php on line 18