Shortly after finishing his season with the Oilers in 2011–12, Dubnyk again was named to Canada's roster for the 2012 IIHF World Championship in Finland and Sweden. Serving as a backup to Cam Ward, he made his tournament debut against France, stopping 19 saves of 21 shots in a 7–2 victory. Five days later, he made his second appearance in the tournament, against Kazakhstan, earning a shutout in an 8–0 victory. This was his final appearance in the tournament, as in the next game, starter Cam Ward and Canada were defeated by Slovakia in the tournament quarterfinal.