I think I'm going to make sure my group members don't get credit for a project they didn't do.
What don't you want them to get credit?
I don't want them to get what's due.
It is only right that you make it known they helped you. They could tell the teacher anyway and you'd look bad for lying.
Shut up.
You're going to get in trouble if you do this. You need to give credit where credit is due.