Fatal error: Uncaught Error: Class 'TopConcepts\Klarna\Tests\Unit\ModuleUnitTestCase' not found in /www/shop/vendor/fatchip-gmbh/oxid-klarna-6/Tests/Unit/Core/KlarnaPaymentTest.php:20 Stack trace: #0 {main} thrown in /www/shop/vendor/fatchip-gmbh/oxid-klarna-6/Tests/Unit/Core/KlarnaPaymentTest.php on line 20