Steve Hansen was not concerned at New Zealand's struggles after they booked their place in the quarter-finals with a win over Georgia.
The All Blacks were some way off their best, with poor handling marring their display in a 43-10 win but Hansen was pleased to have been challenged.
The Kiwi scrum came under pressure, but turned the tide in the final quarter, while they also had to deal with a rush defence from Georgia, which could prove invaluable later in the tournament.
"You're just trying to work on certain parts of your game," explained Hansen, who's side became the first team to reach the last eight with their win.
"We are under no illusions that it wasn't perfect out there. I thought the intensity around some of those contact areas was a different step up.
"There are lots of things that we could have done better. Our skill execution was not great.
"If we had one problem which I would say is the easiest to fix in this team, it's skill execution. We've got plenty of talent.
"At the moment we're working on some other things, and the things we were working on tonight were pretty good.
"I wouldn't say our game was great but it doesn't have to be at the moment. You don't get any gold medals for winning these games. You just to get to qualify.
"We're in a position now where we can say we're in the quarter-finals which is quite exciting."
Meanwhile Richie McCaw allayed fears over his own health, having limped off after an hour. The All Black skipper had picked up a couple of bruises on his shin, but expects to be fully fit for the final pool game against Tonga.