Illaoi's Test of Spirit should have an interaction with minions.

Still trying out Illaoi, so this is my first impression, so take that as you will.

Test of Spirit having no interactions or utility on non-champion units simply feels bad. I understand the use of having minions block it, as it is a potent ability, but it simply feels bad to use it and have it hit a minion as it does literally nothing. From a gameplay perspective, this simply leaves a pit in my stomach.

I would say either have Test of Spirit deal some damage to minion/jungle creeps or also pull their spirit out for some more utility, or tweek the ability and change it so it ignores minion collision.