I stumbled upon this test recently. It is a strengths/weaknesses finder. Takes you a couple of minutes to complete and you will get some kind of result out of it.
One of the things I got from this is that I can grow as a salesman. This is actually quite accurate, because I'm doing quite a lot of different things but I'm bad at bringing them up for some kind of reason. But, this post is not about this specific finding and not about this specific test. It is about tests in general: they can give surprising results and they're an easy and cheap way to gain new (however simplified) insights.
So skip your “it won't tell me anything new”-bias and learn something new. Let me know if you come across interesting and good tests to take!