Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\laravel-back\vendor\lcobucci\jwt\test\unit\Signer\Hmac\Sha384Test.php:14 Stack trace: #0 {main} thrown in C:\xampp\htdocs\laravel-back\vendor\lcobucci\jwt\test\unit\Signer\Hmac\Sha384Test.php on line 14