Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\my-api\vendor\firebase\php-jwt\tests\JWKTest.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\my-api\vendor\firebase\php-jwt\tests\JWKTest.php on line 9