I think the standard server license conditions allow you to install onto 2 or more servers, but the services may only be run on one server at any one time. This is to allow for a manual changeover to a backup DR server.
If you need a test server and a production server to run simultaneously, then you need 2 licenses; there is a special test server license. Enquire with your QV supplier/partner.
Logic will get you from a to b. Imagination will take you everywhere. - A Einstein