Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/app/htdocs/lidia/vendor/omnipay/authorizenet/tests/Message/AIMAbstractRequestTest.php:9 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/omnipay/authorizenet/tests/Message/AIMAbstractRequestTest.php on line 9