For anyone above a jr level developer position, I would assume they'd have code or other artifacts you could review. If you weren't satisfied with their approach or style, don't interview further, or ask for clarification.
If you can not find anyone at all with example code/projects, perhaps then start employing fizzbuzz on folks, but... I can't imagine it's too hard to find developers with at least a minimal portfolio that demonstrates something at least as complex, if not moreso, than fizzbuzz.
If you can not find anyone at all with example code/projects, perhaps then start employing fizzbuzz on folks, but... I can't imagine it's too hard to find developers with at least a minimal portfolio that demonstrates something at least as complex, if not moreso, than fizzbuzz.