Kris Boyd's first goal since returning to Kilmarnock secured a point for the Ayrshire side against St Mirren.
Killie were looking for a win to all but seal a place in the Scottish Premier League's top six but fell behind to an Esmael Goncalves strike.
Boyd, who rejoined his first club in February, fired the hosts level two minutes into the second half.
St Mirren winger Gary Teale and Boyd had opportunities to claim a winner but neither could convert.
Kenny Shiels' side, who are sixth, move a point clear of Aberdeen and Dundee United with one more round of fixtures to come this weekend before the SPL splits in two.
James Fowler, who scored Kilmarnock's winner against Ross County on Saturday, sought to add to his season's tally early on when he ran on to Boyd's quickly taken free-kick but did not seriously trouble Craig Samson.
St Mirren were also prominent in the opening stages and Goncalves managed to get a header on John McGinn's cross only for Cammy Bell to make a comfortable save.
The pace of Goncalves was causing Killie problems and the Portuguese striker dragged a shot wide as the half-hour mark approached.
But the on-loan Rio Ave striker did find the net when he latched on to David van Zanten's pass and fired past Bell from inside the area.
And Steven Thompson was presented with a chance to put the Buddies further ahead moments later but flashed his shot wide from a promising position.
The visitors continued to dominate and Bell scrambled the ball out following another Goncalves strike.
Kilmarnock knew they had to improve and were given the best possible start to the second half when Borja Perez found Boyd in behind the St Mirren defence and the SPL's all-time top scorer drilled the ball into the net.
The former Rangers striker was becoming a persistent threat to the visiting defence and might have done better with a header that Samson gathered at the second attempt.
At the other end, Teale slipped a shot wide following good work by Thompson.
Garry Hay was next to threaten a winner but his powerful long-range drive was held by Samson and an injury-time free-kick by Boyd was also claimed by the keeper.