I'm trying to increase my speed with a metronome by playing Malmsteen's "pre-solo" riff on I'll See the Light, Tonight (the classical sounding one). I'm going from 80-100 bpm practicing and I can do it.

Thep problem is that I ACCIDENTALLY tremolo pick!! Instead of playing each note once I play it to or three times (more if I also do hammers and pulls by accident).

How can I avoid tremolo picking when I only want to stroke the note once?