Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in C:\xampp\htdocs\enercard\vendor\symfony\http-foundation\Tests\StreamedResponseTest.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\enercard\vendor\symfony\http-foundation\Tests\StreamedResponseTest.php on line 17