I was tempted to include unicode when I enhanced the URL/Domain generating strategies in Hypothesis to correctly generate from the set of all valid TLDs a few y

I was tempted to include unicode when I enhanced the URL/Domain generating strategies in Hypothesis to correctly generate from the set of all valid TLDs a few years ago! But I decided against it since technically the canonical storage form doesn't contain the unicode characters as it should have had Punycode (https://en.wikipedia.org/wiki/Punycode https://en.wikipedia.org/wiki/Punycode ) conversion done by the "input" system be it a URL bar of your browser or whatever input handling is in play. Assuming all domain processors are able to correctly Punycode was a bit too much, so I kept it to the set of basic valid characters without needing Punycode conversion, and if someone wanted to fuzz test fully they could just add a layer that generates from full unicode.