The All Blacks might have already won the series over the French but the side is seeking a big finish to the three-test series.
Foster said the team was excited about the game under the roof.
''I do not think there is anything called a dead rubber in test matches.
''If you think about it, everyone expects us to win,'' he said.
''So the minute we start treating the game as a dead rubber we will get a performance we are not happy with and a result we are not happy with. Our expectations are, if you are sitting in the French dressing room, you have played pretty well in the first test and the score blew out.
''The second game they would have walked away with a real edge over us in many aspects. So we are expecting a big push from them.''
He felt the side got beaten to the punch around the park last week and part of that was down to the coaches and choices made earlier in the week and during the game.
''Maybe we should have made a couple of changes early. Did we get the right mix at this time of year? Maybe get a bit more energy in our initial selection ... but that is all hindsight.''
Foster confirmed Beauden Barrett and Vaea Fifita had been ruled out for Saturday because of head knocks. Highlanders and All Black loose forward Liam Squire, who injured his shoulder on Saturday, was also an unlikely starter, Foster said.
That may bring Shannon Frizell or Jordan Taufua into calculations while Damian McKenzie should fill the boots of Beauden Barrett.
Foster said June tests were not always easy as there was not much time and players could not be overloaded with information.
''June is a tricky period particularly when you are bringing new players in. It is in the middle of a Super season and guys are playing really well and then they have to switch into a new mode.
''We found it hard for the older players to switch from one to the other. But the new guys have to learn everything from scratch.
''Our challenge is how much we do and don't do as a coach so they do not have too much to learn. We have been pretty pleased with how that has gone.
''We look a lot at player fatigue levels and who has got the most energy. It is a busy time of the year so we have always had a plan to make decisions based on that. Whether you win or lose does not change that.''
The side is due to be named tomorrow morning.
Foster had sympathy for referee Angus Gardner who sent off French fullback Benjamin Fall last Saturday but said the judiciary also got it right. He thought there was still a place for red cards in the game.
''Everyone wants 15 on 15 as much as we can. But it is a full-contact sport and we have to support a sending off for player safety.
''It becomes a preventive thing for players that do want to do something intentional. I have got no qualms with the red card. If people lose their discipline, then that is what happens.
''Maybe we can just introduce a few more categories. At the moment it is pretty narrow. There is dangerous and reckless which seems to cover everything. We all agree what happened last week, while it was dangerous, it lacked intention.''