@cheba I really don't like `to_not raise_error` and the like, because they don't add anything semantically and they can obscure the cause of the error. See [this blog post](http://www.thagomizer.com/blog/2013/06/11/assert-nothing-raised.html) for a better explanation than I can provide here.

I don't personally have a problem with assertionless tests in this context, catching regressions that raise errors.