Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /home/bookshelter/public_html/vendor/maatwebsite/laravel-sidebar/tests/Domain/DefaultGroupTest.php:8 Stack trace: #0 {main} thrown in /home/bookshelter/public_html/vendor/maatwebsite/laravel-sidebar/tests/Domain/DefaultGroupTest.php on line 8