Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/nixap/ddd.nixap.space/vendor/maatwebsite/laravel-sidebar/tests/Domain/DefaultAppendTest.php:7 Stack trace: #0 {main} thrown in /home/nixap/ddd.nixap.space/vendor/maatwebsite/laravel-sidebar/tests/Domain/DefaultAppendTest.php on line 7