You could write the specs in Gherkin and then it's also a test.
Josua was working on that, already.
Discussion
I you want, you can also make them your public docs. But that‘s tricky. See an example here: https://rspec.info/features/3-13/rspec-core/subject/one-liner-syntax/
Ah, that's actually quite clever. Forces you to include all relevant information and structure it well.