Ruidíaz made his international debut on 7 June 2011 in a 0–0 draw against Japan in Niigata in the Kirin Cup. In the same month, Ruidíaz was called up by coach Sergio Markarián to represent Peru in the Copa América held in Argentina, Ruidíaz was a member of the Peruvian squad that finished 3rd, after a 4–1 victory over Venezuela, Ruidíaz made only one appearance in the tournament in a match against Chile in which Peru lost 1–0.