Partick Thistle and Kilmarnock drew 1-1 at Firhill in Friday's cinch Championship game as the visitors missed the chance to go top of the table.
Oli Shaw gave Derek McInnes' men the lead from the penalty spot but Ross Docherty scored a late equaliser for Ian McCall's side.
Leaders Arbroath travel to Stark's Park to play Raith Rovers on Saturday, with the top four clubs separated by only three points.