Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in E:\xampp\htdocs\api.sis\vendor\sebastian\recursion-context\tests\ContextTest.php:18 Stack trace: #0 {main} thrown in E:\xampp\htdocs\api.sis\vendor\sebastian\recursion-context\tests\ContextTest.php on line 18