Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\www\vendor\jlevers\selling-partner-api\tests\Seller\ProductFeesV0\Responses\GetMyFeesEstimateResponseTest.php:11 Stack trace: #0 {main} thrown in D:\www\vendor\jlevers\selling-partner-api\tests\Seller\ProductFeesV0\Responses\GetMyFeesEstimateResponseTest.php on line 11