Consciousness requires a dynamically-evolving sense of self-awareness which requires a human brain and its biological substrate.
i agree with Peter K's post and "liked it." I singled out this sentense only because I don't think he meant to imply that animals are not conscious, or only a "human" brain can be conscious. If you did mean that Peter please correct me, but I took your sentence in the context that the word "human" had been omitted and that your intended focus was on the "biological substrate." I suppose even the "biological substrate" might not be necessarily precise enough, but I think most of us consider that to be a reasonable way of describing what we think is required for consciousness. I would focus on Peter's "dynamically-evolving sense of self-awareness" as the right direction for a test of consciousness.