Teemu Pukki hit a hat-trick as Celtic beat Linz 5-2 in Austria in a pre-season friendly on Tuesday evening.
Amido Balde and Leigh Griffiths were also on target for Ronny Deila's side, who had Liam Henderson sent off.
Dundee United drew 0-0 away to Irish side Athlone Town while Alloa defeated Montrose 1-0 at Recreation Park.
Forfar Athletic saw off Highland League Inverurie Locos 4-1 at Station Park and Berwick Rangers defeated Lowland League champions Spartans 3-0 at Ainslie Park.
Elgin City drew 2-2 at Highland League Huntly and Queen's Park played out a 0-0 draw against East Kilbride of the Lowland League.