In 2012, Bernat was part of the squad that won the Under-19 Championship in Estonia. On 3 October 2014, he was called up by full side manager Vicente del Bosque for UEFA Euro 2016 qualifying matches against Slovakia and Luxembourg: he made his debut on the 12th against the latter, replacing Andrés Iniesta for the final 20 minutes and scoring the last goal of a 4–0 win.