Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\laragon\www\bc-game-updown\backend\vendor\guzzlehttp\psr7\tests\HeaderTest.php:10 Stack trace: #0 {main} thrown in C:\laragon\www\bc-game-updown\backend\vendor\guzzlehttp\psr7\tests\HeaderTest.php on line 10