We can "force" Jogi Low's hand by playing Werner here really. I mean, you have Mourinho saying he will start Kane against Dinamo Zagreb even though Spurs are already 2-0 up in the tie and have a game against Villa on Sunday.
Moreover, Germany will be facing Iceland (h), Romania (a) and Macedonia (h). Think they should be able to win those games without Werner starting in all 3 games. Am sure Low will also rotate his squad anyway to prevent any issues for his Euro squad later on.