Saturday's Scottish Championship game between Inverness Caledonian Thistle and Alloa Athletic has been postponed because of a frozen pitch.
However, Dunfermline Athletic v Ayr United in the same division passed a 12.15 GMT pitch inspection and will go ahead.
Friday's draw for Dundee away to Arbroath, means Dunfermline can move three points clear in second.
Hearts, who have a seven-point lead, host fifth-placed Raith Rovers.
The other fixture has fourth-top Greenock Morton travelling to Dumfries to meet Queen of the South.