Holders St Johnstone booked their place in Thursday's draw for the semi-finals of the Premier Sports Cup with a 2-0 win over Dundee at the Kilmac Stadium.
Shaun Rooney opened the scoring with the aid of a deflection after 69 minutes and Ali Crawford added a late second goal for Callum Davidson's side.
In Wednesday's other quarter-final, Rangers defeated Livingston 2-0 at Ibrox with second-half goals from Kemar Roofe and Alfredo Morelos.