I don't care for the name "where" since it makes me think that is is a place to define bindings, like Haskell. I would prefer a term like "expect" or "tests".
It doesn't read fluidly. We care a lot about how our programs are verbalized.
We were well aware of the Haskell use, but most of our users have not seen or even heard of Haskell before. So that's not a real problem here.
People who don't have Haskell experience find it utterly unsurprising that what follows `where` are the examples/tests. So I think your expectation is being set overly by your Haskell experience.
