Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /home/deborapsol/laravel/vendor/escopecz/mautic-form-submit/tests/HttpHeaderTest.php:7 Stack trace: #0 {main} thrown in /home/deborapsol/laravel/vendor/escopecz/mautic-form-submit/tests/HttpHeaderTest.php on line 7