Renfro, who violated his probation in May when he was arrested for underage drinking in Knoxville, Tenn., tested negative. He was on probation after he tried to steal a yacht last year in Fort Lauderdale.
Renfro did not have much to say in the proceedings, which lasted about three minutes.
"Stay the course and everything will work out fine," Judge Ronald J. Rothschild told the scruffy looking Renfro after asking him to remove his hands from his pockets.
The 18-year-old actor was arrested in August when he and a friend tried to steal the 45-foot yacht from Holiday Harbor in Fort Lauderdale.
They damaged the stern of the vessel when they forgot to untie the docking lines. A judge sentenced Renfro to two years' probation in January and ordered him to pay over $4,000 in repairs.
Renfro was in Fort Lauderdale at the time shooting Bully, a film about a group of Florida teens who lure a school bully to a swamp and beat him to death. The film, based on a real incident, is an adaptation of a 1998 Jim Schulze novel. It opened Friday in limited release.
Renfro missed the film's premiere to make his Thursday and Tuesday court appearances.