Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in C:\xampp\htdocs\print-bk\vendor\ralouphie\getallheaders\tests\GetAllHeadersTest.php:3 Stack trace: #0 {main} thrown in C:\xampp\htdocs\print-bk\vendor\ralouphie\getallheaders\tests\GetAllHeadersTest.php on line 3