A test requires you to roll dice.
When do you roll dice, in order to successfully wear armor?
Yeah and as I pointed out when averaging attributes it was not referred to as a test but a task. It seems more likely to me that since 99% of the time you are using a stat it is by rolling dice they specified that up front. Since they specified that you are then saying that is the only way it is used. While your average task which can involve rolling dice and not rolling dice depending on the situation was not clearly specified. That does not mean the only time the averaging comes into play is when rolling dice in a test.
On top of that it narrows a rule down to a weird level, where super-humanly strong/tough bodies are encumbered by low levels of armor. When a rule makes you go WTF, that makes no sense I think it is a good time to step back and wonder if you are word gaming the rule too much.