Gazzetta dello sport report on their website that Inter are expected to rest a lot of players against Rubin Kazan since the nerazzurri are allready qualified:

“A tough trip to Kazan is what’s next for Inter after the draw against Cagliari. For the game a lot of changes are expected, much due to the fact that both Inter and Rubin allready are qualified to the knockout rounds. The only thing that there is to play about is the first place in the group.”

Source: Fcinternews.it