Voters in four Quebec ridings will be heading to the polls in December.

Premier Philippe Couillard confirmed in a statement that in cabinet meeting Wednesday morning, they adopted a decree to hold the by-elections.

All four races were triggered because of different circumstances:

Roy was with the CAQ before she became an independent MNA, so the party is hoping to hold on to the riding.

"I hope to protect this one, and I would like to make a gain in the three other races," said CAQ leader Francois Legault.

The PQ is hoping to hold on to St-Jerome, which is a swing riding. The CAQ won that riding before Peladeau won it for the PQ - and he did not win by a large margin.

“I'll be very present in the four by-elections between now and the 5th, starting this weekend, and I'm very hopeful in the four,” said PQ leader Jean-Francois Lisée.

“After two-years-and-a-half people will say if they are happy or unhappy about the government. We'll put a lot of emphasis on taxes and also about identity issues,” said Legault.

The by-elections will be held on Dec. 5.