New signing Ross Caldwell scored the only goal as St Mirren beat Albion Rovers 1-0 at Cliftonhill on Tuesday night.
Mickael Antoine-Curier bagged a hat-trick as Hamilton Accies defeated Dumbarton 3-1 at New Douglas Park and Ross County cruised to a 4-0 win at Highland League Rothes.
Dunfermline and Hibernian played out a 0-0 draw at East End Park but Raith Rovers went down 4-0 to York City at Stark's Park.
Annan Athletic lost 1-0 to Carlisle City at Galabank, Montrose were beaten 2-1 by Dundee's U20 side at Links Park and Whitehill Welfare edged out Berwick Rangers 2-1.
Rangers kicked off their North American Tour with a 3-1 defeat to Ventura County Fusion in California.