Twice World Cup winners and eight time champions of Europe, Germany are currently ranked third best by Fifa.
“There were moments in the game we feel were unlucky to go against us,” McArdle said, reflecting on the loss at Tannadice. “But also moments of real clarity.
“The stats weren’t too different, other than final box entries and then getting shots at goals. That was the key difference and Germany being very clinical.”
Looking ahead to Tuesday’s test in Wolfsburg, he added: “That’s the exciting part. They’re getting stressed against the best in international football.
“They’ve coped very well. Probably mentally, is the biggest challenge from the first camp. It’s probably the easy one, where you come in on adrenaline.
“The second one is where you have more judgment and more expectation. I’ve got massive applause to the senior players, who have been outstanding.
“The young players have helped them along the way. They’ve focused their efforts on helping them be the best version of themselves. They see their younger self in them as well, so they know how to empathise that way.”
While the Scots have no fresh injury problems, Eintracht Frankfurt defender Sara Doorsun, who was an unused substitute at Tannadice on Friday, misses out for Germany.