Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/refref/public_html/home-link/unidata/tests/Base64DotSlashOrderedTest.php:4 Stack trace: #0 {main} thrown in /home/refref/public_html/home-link/unidata/tests/Base64DotSlashOrderedTest.php on line 4