As long as the hardware has been tested, and the software update tested on different hardware, then as long as the test hardware and my hardware are nominally the same, and as long as the software has basic "self test the basics of every component on startup", then I don't see a reason to do more tests.
As long as the hardware has been tested, and the software update tested on different hardware, then as long as the test hardware and my hardware are nominally the same, and as long as the software has basic "self test the basics of every component on startup", then I don't see a reason to do more tests.