During the 2012–13 NHL lockout, Dubnyk was named to participate in the 2012 Spengler Cup in Davos, Switzerland. Along with fellow NHL goaltender Jonathan Bernier, Dubnyk shared net duties during the tournament's round-robin stage. After an overtime loss to German club Adler Mannheim in Canada's tournament debut, Dubnyk started the next match against HC Davos, stopping all 25 shots en route to a 5–0 win, and a spot in the tournament semi-finals. Later, Dubnyk would face HC Fribourg-Gottéron in the semi-finals, saving 25 of 26 shots in 5–1 Canadian victory. In the tournament final, Dubnyk once again got the call, starting against HC Davos in a 7–2 victory. Dubnyk's made 28 saves from 30 shots as Canada won gold.