I have no problems with the extras on the test, what I want is for them to standardise the levels when things are deemed worn out and in need of replacement.
Last year my car failed on overly corroded brake lines and the handbrake not being strong enough on one wheel.
While sorting out the handbrake I looked at the brake libes, which were dirty rather than corroded, I gave them a quick clean and a grease, they then passed 24 hours after they had failed.
The garage in question swore I had replaced them, lying cheating bunch of numptyas!