Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/alkhalaffamily/public_html/cendrilla/vendor/sebastian/environment/tests/OperatingSystemTest.php:17
Stack trace:
#0 {main}
thrown in /home/alkhalaffamily/public_html/cendrilla/vendor/sebastian/environment/tests/OperatingSystemTest.php on line 17