There isn't a way to test it at this time, yes. I have my own doubts, considering one particular resident. But that may be because of my own lack of knowledge on the Stars of Destiny, besides 108 Stars of Heaven and Earth comprising them. [An entire Suikocast of Stars. I guess it helps that there just aren't that many major non-Stars in the games.]

So you've noticed a trend as well. Very quick on the uptake.