Fatal error: Uncaught Error: Class 'Omnipay\Tests\TestCase' not found in /home/app/htdocs/ninja/vendor/omnipay/common/tests/Omnipay/Common/Message/AbstractResponseTest.php:8 Stack trace: #0 {main} thrown in /home/app/htdocs/ninja/vendor/omnipay/common/tests/Omnipay/Common/Message/AbstractResponseTest.php on line 8