"Six points is the order of the day and if we do that it will be great - that's what all our training has been towards.
"If we get four and Forest drop a few then that would be OK, but we don't want them creeping up behind us."
On tomorrow's game with Swansea Johnson said.
"I would have thought they will bring Trundle back.
"I think he left him out because he was suspended previously and they won without him. He is a match-winner on his day.
"He is a lot better with the ball than he is without the ball so we have to try to keep the ball away from him.
"Swansea definitely need to win. They are just outside the play-offs and anywhere outside the play-offs is never good enough for Swansea."