Just been practicing a little etude I found on YT - just some scales major up, minor down - so 1,3,5 in a major scale(A,Db,E), 5,3,1 (E,C,A) in a minor scale.
The "natural" fingering in the major scale is 2nd, 1st, 4th finger but the fingering in the minor scale is 3rd, 4th, 1st.
I hadn't played this before - requires you to swap the fingers that you start and finish the riff with. Much more difficult than you'd expect.
Try it and see.