Nicolas Deslauriers' second goal put the Montréal Canadiens ahead late in the second period and they held on to beat the Detroit Red Wings 4-3.
Antti Niemi had 23 saves for the Canadiens who started in place of struggling star Carey Price.
Detroit's Jared Coreau stopped 24 shots, giving Jimmy Howard the night off.
Montreal took advantage of the Red Wings turning the puck over, including early in the third period when Artturi Lehkonen scored to create a two-goal cushion.
Darren Helm scored less than a minute later to pull Detroit within a goal, but it couldn't' score again to extend the game.
Both Original Six teams are out of the playoff race.
— with files from The Canadian Press