Fatal error: Uncaught Error: Class 'Omnipay\Tests\GatewayTestCase' not found in /home/app/htdocs/ninja/vendor/omnipay/multisafepay/tests/XmlGatewayTest.php:14
Stack trace:
#0 {main}
thrown in /home/app/htdocs/ninja/vendor/omnipay/multisafepay/tests/XmlGatewayTest.php on line 14