Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in C:\xampp\htdocs\docu_sign\App\vendor\mashape\unirest-php\tests\Unirest\RequestTest.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\docu_sign\App\vendor\mashape\unirest-php\tests\Unirest\RequestTest.php on line 9