Have to speak fast for 10 minutes - any tips?

Have to speak fast for 10 minutes - any tips? I'm a 17 year old who has stuttered since I can remember. I've mastered my stutter to the point where the only indication is occasional disfluency in terms of gaps when I talk. I have a decent amount of control over it during everyday conversations. The stutter becomes apparent when I have to talk continuously for a long period of time (e.g. a presentation). However, even that is manageable with sufficient preparation and a slow rate of speech. As part of my school exam, I have to essentially prepare and deliver a 10-minute talk at a relatively fast pace. It is a timed assessment that adds to the pressure that would increase my stutter. I know that preparation does help, but speaking fast in general does increase my stutter. Does anyone have any tips on how to talk quickly without stuttering much? Also, more generally, during a nervous situation like a viva voce, what are some ways to reduce your stutter?