The Hockeyroos had opened their account in the 29th minute for a 1-nil lead in regulation time when Hanna Kate scored a field goal.
It wasn't until the 59th minute that the Janneke Schopman-coached side found the equaliser, 1-1, when Caitlin van Sickle pounced on a thwarted penalty corner to deposit the ball into the backboard.
It was a testy finish to the tournament for the Aussies after keeper Wells lost her composure post-match in the 1-all stalemate against the Vantage Black Sticks last Thursday.
The Paul Gaudoin-coached Hockeyroos, in response to Hawke's Bay Today reports of Wells' colourful response to missing a freaky goal from Samantha Harrison, was to refrain from speaking to all media at the weekend.
The Americans made a promising start but didn't maintain consistency in a tourney where all four teams are experimenting with a cluster of youngsters and fringe players in a bid to rebuild their stocks post-Rio Olympics.