Justin Bieber’s Scheduled to Take DNA Test Today, Friday!

Justin Bieber have a doctor’s appointment visit on Friday — to take a DNA test disproving he’s the father of Mariah Yeater’s son Tristyn, 4 months.

“He’s ready to take a paternity test, at any moment. We have one scheduled for tomorrow,” Bieber’s manager, Scooter Braun, told Extra host Maria Menounos at Thursday’s Pencils of Promise charity event in L.A. Watch the interview.

The announcement is a surprise, since Justin is not obligated to take the test. Yeater had claimed that she had 30-seconds quick sex with Bieber backstage at an L.A. concert in October 2010, but she dropped her much-scrutinzed paternity suit last week.

Scooter explained that Justin “doesn’t mind” taking the DNA test. “He’s like ‘I’m just going to go ahead of it and be fine. It doesn’t matter.”

Bieber team is still considering legal action against Yeater, Braun hinted. “We’ve never even seen the lawsuit, but we’re going to just get ahead of this thing and go right after it. I think it’s important to hold people accountable for their actions. We don’t want it to seem like its okay for everyone to say, like, ‘I had Justin’s baby or having his baby.’”