If I was you, I would just keep plugging at it and definitely do not tell him that you have had other tests. Portray that you're confident!
In my opinion, when examiners do not feel completely confident about your driving, they may be more likely to see the minor faults. So if you give an overall safe drive, and make the examiner feel safe, certain things are more likely to be overlooked. But saying that, some examiners are more lenient than others.
Personally, I failed my test twice. The first time, I was just not ready, failing with 1 dangerous fault, 3 serious and about 13 minor faults.
My second test had no minor faults but I hit the kerb so I was kicking myself, but I know if I passed at that point then I would not feel safe.
I did pass on my third attempt though after feeling as though I'll never get there.
So my advice to you OP, is to just keep trying. You will get there. I promise!