I stumbled upon this for free: http://www.musicopedia.com/training/mandolin.php You can see practice and tests for Mandolin for Standard Notation and Fretboard - just thought I'd pass it along.
that was all going well until i noticed the ticking clock - and had only done 2 notes in 30 seconds!! must count faster.
LOL- I practiced first before I hit test. Otherwise I'd get a big fat zero!