Fatal error: Uncaught Error: Class 'oxNewsLetter' not found in /www/shop/vendor/oxid-esales/oxideshop-ce/tests/Unit/Application/Model/NewsletterTest.php:15 Stack trace: #0 {main} thrown in /www/shop/vendor/oxid-esales/oxideshop-ce/tests/Unit/Application/Model/NewsletterTest.php on line 15