Wolves secured the Championship title after Kyel Reid's late goal denied relegation-threatened Barnsley a win.
Barnsley had taken the lead when Daniel Bogdanovic's scuffed shot fell to Jon Macken, who tucked the ball home after his initial effort was saved.
Wolves upped their game and eventually equalised six minutes from time.
Former Barnsley player Reid was left unmarked at the far post and smashed home a low shot from Matt Jarvis' cross to earn the visitors a draw.
Barnsley boss Simon Davey:
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"It is so frustrating to match a team like Wolves and then throw it away.
"Somebody up there is putting us through the mill at the moment and we have thrown away another two points.
"But we have nobody else but ourselves to blame, so now we need to go to Plymouth and get a result, and I am confident we will do."
Wolves boss Mick McCarthy on hometown club Barnsley's plight:
"It is a little bit sombre for me because I hope Barnsley stay up.
"Anyone who has seen me play will like me because the way I fought for the club, and I would do everything for the club I am paid by.
"I hope it is enough for them to stay up though, so it tinges a little bit of sadness."
McCarthy on a post-match pitch invasion:
"I wasn't best pleased about it, somebody tried to jump on my back and I don't know if it was someone who wanted to celebrate with me or what.
"It was unfortunate, it's mad and it has taken a slight bit of gloss of the achievement.
"I would have liked us to have applauded the fans and celebrate with them but the invasion prevented us doing that."
Barnsley: Steele, Hassell, Moore, Guedes, Kozluk, Hammill (Teymourian 70), De Silva, Colace, Campbell-Ryce, Macken, Bogdanovic (Mifsud 77).Subs Not Used: Muller, Devaney, El Haimour.
Booked: Guedes.
Goals: Macken 58.
Wolverhampton: Hennessey, Foley, Craddock, Berra, Stephen Ward, Jarvis, Edwards, Henry, Friend (Reid 46), Keogh (Hemmings 68), Harewood (Vokes 46). Subs Not Used: Stearman, Higgs.
Goals: Reid 84.
Att: 18,288
Ref: Kevin Friend (Leicestershire).
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