Dundee thumped Motherwell 5-1 at Fir Park on Saturday to remain in the top six in the Ladbrokes Premiership.
Louis Moult cancelled out Zak Jules' early own goal but Marcus Haber (2), Mark O'Hara and Craig Wighton were all on target before the break.
Leaders Celtic extended their winning run with a 2-0 defeat of bottom club Hamilton Accies at Parkhead thanks to a Moussa Dembele double, one a penalty.
Aberdeen are nine points clear in second place after Adam Rooney's second-half goal earned them a 1-0 home win over Ross County.
Partick Thistle saw off Hearts 2-0 at Firhill with goals from Kris Doolan and Liam Lindsay while Esmael Goncalves was sent off for the visitors.
Rory McKenzie and Conor Sammon were on target as Kilmarnock earned a 2-0 win against St Johnstone at McDiarmid Park.