Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/immunoglow/public_html/immunoglow/vendor/maennchen/zipstream-php/test/CallbackOutputTest.php:13 Stack trace: #0 {main} thrown in /home/immunoglow/public_html/immunoglow/vendor/maennchen/zipstream-php/test/CallbackOutputTest.php on line 13