I am a little confused on using test devices for Patch Policy publishing. I have a few test systems throughout my deployment. Most of them are part of the main deployment setup with Windows 10 and Office 2013 for patch processes. When does the patch policy become valid for publishing? When all test devices successfully install the patch or just one? I am making the assumption it is when all install the policy but would like verification.

Also is there a better way to deal with this setup? should I be manually installing the patches for the test devices to ensure proper patch stability or is there a faster way to process this so that the reset of my devices are getting these patches.