Livingston leapfrogged Partick and moved into fourth with a 3-1 win over their Scottish First Division rivals.
The home side went in front after 36 minutes when Liam Fox picked out Marc McNulty to stroke the ball into the bottom corner of the net for his 10th goal of the season.
And the lead was doubled within 20 seconds of the restart as Paul Watson rose highest to head home Robert Barr's corner.
The game was over as a contest in the 52nd minute when Kyle Jacobs fired home from 20 yards to secure the Lions' first win of 2012.
Paul Cairney scored three minutes from time after picking up Kris Doolan's pass and slotting home, but it was merely a consolation for the Jags.