Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in D:\Application\www\Training\vendor\psy\psysh\test\Psy\Test\CodeCleaner\CodeCleanerTestCase.php:20 Stack trace: #0 {main} thrown in D:\Application\www\Training\vendor\psy\psysh\test\Psy\Test\CodeCleaner\CodeCleanerTestCase.php on line 20