Fatal error: Uncaught Error: Class 'Omnipay\Tests\GatewayTestCase' not found in /home/app/htdocs/ninja/vendor/alfaproject/omnipay-skrill/tests/Omnipay/Skrill/GatewayTest.php:6 Stack trace: #0 {main} thrown in /home/app/htdocs/ninja/vendor/alfaproject/omnipay-skrill/tests/Omnipay/Skrill/GatewayTest.php on line 6