Hearts fail to close gap on second-placed Aberdeen, as they slump to a 1-0 defeat at Motherwell.
Motherwell assistant manager Stephen Robinson has extended his contract with the Scottish Premiership side.
Celtic stretched their lead at the top of the table to eight points after beating spirited Motherwell 2-1 at Fir Park.
Alex Schalk scored the only goal as Ross County beat Partick to make certain of a top-half finish.
Celtic assistant John Kennedy believes Celtic showed their mettle to earn a 2-1 victory over Motherwell at Fir Park.
Motherwell boss Mark McGhee named Scottish Premiership manager of the month for March.
A number of Scottish Premiership managers have welcomed Rangers' promotion to the top flight.
Dundee United's quest for Premiership survival is lifted by a win at St Johnstone while Kilmarnock are held at Partick.
Fast and easy online Sky Sports upgrade
A Day Pass for only £6.99. No contract
Pick your team for free to win £10,000k
Check out all the latest transfer news
Listen to the latest Premier League news
Sky Bet Football League
29th May 2016