Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\reservation\vendor\anlutro\l4-settings\tests\unit\ArrayUtilTest.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\reservation\vendor\anlutro\l4-settings\tests\unit\ArrayUtilTest.php on line 6