The hosts have no chance of reaching the finals in Brazil next summer while the Croats will go into the play-offs next month after losing to Group A winners Belgium on Friday.
After arriving in Glasgow on Monday, Stimac was quoted as saying the game would be a "kind of a training session" for his side, to which Scots boss Strachan said: "He can have any comments he wants. I like Igor, a nice fella.
"I spent time with him in Poland (during Euro 2012), I've known him since he was at Derby.
"It depends if he said training or experimenting. Experiment is completely different from training.
"I look forward to seeing him. He is a good man, he organises his team well and we wish him all the best in the play-offs."