Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\r10csm\vendor\sebastian\complexity\tests\unit\ComplexityCollectionTest.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\r10csm\vendor\sebastian\complexity\tests\unit\ComplexityCollectionTest.php on line 22