Testo, a junior transfer from USC, had the game against his former school circled on his calendar all season.
"I couldn't wait for this game, but I could have done without it too," Testo said. "It was just an awkward situation."
Testo had a chance to show his old team what it is like to compete against him instead of with him, and he took advantage of the opportunity early.
In the fourth minute of UNC's game with the Gamecocks, Testo took a ball from Chris Leitch and rifled a low shot into the net from the top of the 18-yard box. The goal proved to be the game winner in the 1-0 UNC victory Friday.
"It was early in the game, and my adrenaline was pumping," Testo said. "I saw an opening, so I just put my head down and hit it."
The Gamecocks' loss has been the Tar Heels' gain. The goal gave Testo nine on the season, tying him with Ryan Kneipper for the team lead.
His scoring ability has helped answer some of the glaring questions that were raised about the Tar Heels' offense at the beginning of the season.
"He was a fantastic addition," said North Carolina coach Elmar Bolowich. "Having had the departure of three forwards from last year's team, he is ... filling the void there as an experienced player."
South Carolina coach Mark Berson said his team is looking forward to meeting Testo again.