I agree. I don't know where you found this alleged home pregnancy test but it sounds like someone entirely made it up.
Unprotected sex doesn't only mean he doesn't finish inside you. It means having a bare penis inside of you at all (vaginally, anyway). But going along with what Ella said, if it's only his fingers, chances are any sperm that was on his hands died within a short time of being outside of his body. It's extremely unlikely you would get pregnant by that.
If you want to be sure, just buy a real test. They are not very expensive (I think the generic ones go for about $8 for a box of two) and are sold everywhere. If you do not want to have to pass by a cashier, chose a store like Meijer, where you can go through the self checkout lane in peace.
This is not a real pregnancy test. And you cannot get pregnant from fingering