Not only did the 27-year-old German score an absolute wondergoal to secure a point for Stuart Pearce's side, he produced a solid all-round performance.
And the Forest boss himself acknowledged the difference in tempo after half-time.
"In the first half we had no desire, no devilment, no oomph - we had a real nervousness about our play," Pearce told BBC Sport after the game.
"In the second half, it was a total contrast. The players went out, got on the front foot and showed desire and energy.
"We had one or two reasonably critical words at half time but they were constructive ones. We mainly just told them that they were doing themselves a disservice."
Could that perhaps have had anything to do with Tesche's introduction? Most likely - and Forest fans certainly feel that way.
After Lansbury's dip in form, the City Ground faithful were highly critical of their midfielder, although he looked as though he could be back to his best against Wolves. Yesterday, however, the 24-year-old was unimpressive.
And match-saving hero Tesche, according to Nottingham Forest supporters on Twitter after the game, needs to start ahead of Lansbury...
Hindsight is a wonderful thing but who could have imagined such a dip in form from Henri? Robert Tesche made a huge difference. #nffc— geoff (@n55ffc) December 7, 2014
Robert Tesche over Henri Lansbury any day...also a dead snail over Lascelles & Fox! #nffc— Gaz △⃒⃘ (@NffcgazTaylor) December 7, 2014
@johnbridges754 I don't think he deserves to start right now. Tesche is doing all the things Henri used to do, plus he also can score!— Hannah Dexter (@hannahforest) December 6, 2014
@seanreid86 such a sick technique. Tesche has to play more he did so much better then Henri— ... (@_Assombalongad) December 7, 2014
Why do we not play hunt at rb lichaj at left back tesche or vaughan instead of Henri and burke instead of ince ? #nffc— FALAF (@PDjahNFFC) December 7, 2014
Now I've seen that Tesche goal again on TV. It was an incredible strike. I don't think we will see better at the CG this season! #nffc— Hannah Dexter (@hannahforest) December 7, 2014
On the plus side, what a goal that was. Will struggle to find a better goal all season. On Tesche's weaker foot as well #nffc— Dan Berridge (@DanBerridge) December 6, 2014