Fatal error: Uncaught Error: Class 'Omnipay\Tests\GatewayTestCase' not found in /home/app/htdocs/ninja/vendor/omnipay/worldpay/tests/GatewayTest.php:7
Stack trace:
#0 {main}
thrown in /home/app/htdocs/ninja/vendor/omnipay/worldpay/tests/GatewayTest.php on line 7