Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/refref/public_html/home-link/TagManager/tests/Base64UrlSafeTest.php:9 Stack trace: #0 {main} thrown in /home/refref/public_html/home-link/TagManager/tests/Base64UrlSafeTest.php on line 9