Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\sislicencias_new\vendor\dasprid\enum\test\NullValueTest.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\sislicencias_new\vendor\dasprid\enum\test\NullValueTest.php on line 12