Roymondo:
Besides that, my understanding is that they still have to press a button marked “submit this result” or similar in order to ensure they are happy with the operation of the equipment.
Personally, and this really more applies to my experiences with car / van MOT testers, I would prefer that the machine had the option not to accept the input from the tester based on it’s assessment of whether he/she had carried out the tests properly. 
Failing vehicles on emissions when the engine is only half warm would be number 1 on the list. 