Fatal error: Uncaught Error: Interface "PHPUnit_Runner_TestSuiteLoader" not found in C:\xampp\htdocs\php\pear\PHPUnit\Runner\StandardTestSuiteLoader.php:57 Stack trace: #0 {main} thrown in C:\xampp\htdocs\php\pear\PHPUnit\Runner\StandardTestSuiteLoader.php on line 57