Hibernian beat Kilmarnock 5-3 in a goal-laden game at Easter Road on Saturday to stay just three points behind second-placed Aberdeen.
Scott Allan, Steven Whittaker, Jamie Maclaren, Florian Kamberi and Brandon Barker were all on target for Hibs, with Kris Boyd (2) and Stuart Findlay netting for Steve Clarke's team.
Hamilton Accies moved four points clear of the relegation places with a 2-0 home win over bottom club Ross County while Conor Sammon converted a last-minute penalty to earn 11th-placed Partick Thistle a 1-1 draw against St Johnstone at McDiarmid Park. Motherwell came from behind to defeat Dundee 2-1 at Fir Park.
Celtic will wrap up their seventh title in a row if they beat Rangers at Parkhead on Sunday, live on Sky Sports with a 12 noon kick-off.