Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\gen\ms_core\DiscordApi\vendor\team-reflex\discord-php\tests\DiscordTest.php:16 Stack trace: #0 {main} thrown in C:\gen\ms_core\DiscordApi\vendor\team-reflex\discord-php\tests\DiscordTest.php on line 16