Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\mtamp3\vendor\darkwob\youtube-mp3-converter\tests\Progress\RedisProgressTest.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\mtamp3\vendor\darkwob\youtube-mp3-converter\tests\Progress\RedisProgressTest.php on line 9