Championship winners Hearts enjoyed an afternoon of celebration at Tynecastle as they beat Queen of the South 2-0.
Robbie Neilson's men clinched the title last weekend and goals from Osman Sow and Alim Ozturk earned them another victory against their play-off chasing opponents.
Second-placed Hibernian lost 2-1 to Raith Rovers at Stark's Park. Lewis Vaughan scored a late winner for Grant Murray's side after Fraser Fyvie had cancelled out Mark Stewart's opener.
Rangers scored three times in the closing stages to beat Cowdenbeath 4-1 at Ibrox. Nicky Clark broke the deadlock and Darren McGregor and Haris Vuckic, with a double, sealed the points for Stuart McCall's team after Kudus Oyenuga had equalised.
Falkirk's play-off hopes suffered a blow as they went down 1-0 at Dumbarton, with Archie Campbell grabbing an 81st-minute winner for Ian Murray’s men.
Alloa and Livingston, who meet in the Petrofac Training Cup Final next weekend, served up a 2-2 draw at the Indodrill Stadium. The Wasps were twice ahead through Liam Buchanan but a Ben Gordon own goal and a late Rory Boulding effort earned Livi a point.