This is totally illogical, think about itAs in once they see they will fail it straight away, they won't even bother checking anything else
I would be rather annoyed if i had paid for a test and they did do that, for the fee i would expect a complete report so that i know where i stand with the vehicle in terms of repair. If a tester abandoned the test at first clear failure then no-one would ever know the total damage to get through!