Holders Celtic host Partick Thistle in the fifth round of the Scottish Cup while Aberdeen will take on Dundee United.
Scottish Championship Football
Brora Rangers' Jamie Duff thinks a Highland derby rather than facing Celtic or Rangers would be an ideal Scottish Cup draw.
Aberdeen cruise into the fifth round of the Scottish Cup as Adam Rooney, Ryan Christie with two and Gary Mackay-Steven down St Mirren.
George Oakley's late equaliser secures Inverness Caledonian Thistle a Scottish replay against Premiership side Dundee.
Audio & Video
A late goal from substitute Jai Quitongo gives Greenock Morton a Scottish Cup win over Championship rivals Dunfermline Athletic.