Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Apache24\www\lupin\back-end\vendor\s1lentium\iptools\tests\NetworkTest.php:7 Stack trace: #0 {main} thrown in D:\Apache24\www\lupin\back-end\vendor\s1lentium\iptools\tests\NetworkTest.php on line 7