Fatal error: Uncaught Error: Interface "PHPUnit_Framework_Test" not found in C:\xampp\php\pear\PHPUnit\Framework\TestSuite.php:82 Stack trace: #0 C:\xampp\htdocs\php\tests\AllTests.php(20): require_once() #1 {main} thrown in C:\xampp\php\pear\PHPUnit\Framework\TestSuite.php on line 82