Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/demoinvfsanz/public_html/vendor/league/flysystem/tests/UtilMimeTests.php:7 Stack trace: #0 {main} thrown in /home/demoinvfsanz/public_html/vendor/league/flysystem/tests/UtilMimeTests.php on line 7