Livingston thrashed Ayr United 5-0 on Friday night to close the gap on William Hill Championship leaders Falkirk to three points.
Stephen Kelly grabbed a first-half double for David Martindale's men, with Robbie Muirhead also converting a penalty before the break.
Cristian Montano scored the fourth goal with 11 minutes left and Reece McAlear rounded off an emphatic victory with a superb volley in stoppage time.
The result means Falkirk, who host Raith Rovers today, cannot clinch the title this weekend while Ayr are guaranteed to finish the season in third place.