Blair Spittal's 79th-minute goal saw Mixu Paatelainen's struggling side into the next round.
The League Two outfit pulled off the biggest result in their 74-year history in the fourth round.
Dan Carter kicked 12 points as the French league leaders tightened their grip on Pool Three.
Motherwell face Cove Rangers, whilst Mixu Paatelainen's Dundee United side travel to Airdrie.
The Gunners claimed an uninspiring win to leave Treviso rooted to the bottom of the Pro 12 standings.
The Scottish Cup fourth round tie between East Kilbride and Lothian has also been called off.
Dan Seaborne and David Amoo found the net from second-half corners as the visitors progressed.
Midfielder thrilled with opportunity to shine at Ibrox under old manager.
Mark Warburton on finding Andre Gray and missing out on Jamie Vardy.
The 26-year old joins on-loan from Norwegian club Rosenborg Ballklub.
John Collins believes the Irish striker would do well to link up with John Hughes again.
Head coach believes Hearts have the quality to end winless streak since 2012 triumph
Aberdeen face Hearts in the fourth round of the competition at Tynecastle this weekend.
The Fourth Round brings opportunity for some teams to upset the odds against bigger names.
The 23-year-old defender is training with the Scottish Premiership champions.
Sean Murdoch believes his League One side can pull off a Scottish Cup shock.
Shocks, new signings and famous fans - the romance of the cup is impossible to resist.
The 18-year-old has pledged his future to the Rugby Park side.
Video may be used to assist referees with “game-changing moments”.
All the latest news from Scottish clubs in the January transfer window.