Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\kalimark\vendor\sebastian\global-state\tests\CodeExporterTest.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\kalimark\vendor\sebastian\global-state\tests\CodeExporterTest.php on line 20