Les Bleus lost 19-14 to Tonga in Wellington as they completed their Pool A campaign with two losses, but still advanced to the anticipated last-eight battle with England.
"In the past France has traditionally needed this kind of electroshock to give its best," said Lievremont. "The concentration and commitment has been bigger (in training) than in previous matches, that's for sure."
He continued: "It's also linked to the fact we lost our game, so that's fairly normal.
"I am certain that the team has prepared well, I am certain that in the past, a French team, a group of men, that was problematic has faced up to the responsibility and given their best.
"I have faith in my squad."