Canada's top court is taking on another press freedom case involving The Globe and Mail and a Montreal firm at the centre of the sponsorship scandal.

The Supreme Court of Canada will hear the Globe and Mail's challenge of a gag order that barred it from reporting settlement talks between Ottawa and a Quebec advertising firm.

Ottawa is suing Groupe Polygone for $35 million, trying to recoup sponsorship money paid by the former Liberal government.

Globe and Mail reporter Daniel Leblanc broke many of the first stories on the scandal with help from unidentified sources.

The top court has already agreed to hear a separate challenge of the Quebec Superior Court's attempt to press Leblanc to reveal his sources.

Justice Jean-Francois de Grandpre issued a gag order against the Globe last year when it reported Ottawa and Polygone were talking out of court.