Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/trombino/public_html/africa.trombino.org/vendor_new_3/sebastian/environment/tests/RuntimeTest.php:17 Stack trace: #0 {main} thrown in /home/trombino/public_html/africa.trombino.org/vendor_new_3/sebastian/environment/tests/RuntimeTest.php on line 17