{"ast_node_type":"variable","tokens":[{"end":76,"kind":"keyword","start":0,"text":"let"}]}
            let test = Test { name: name.clone(), text, kind: ok, edition };
                text.lines().next().and_then(|it| it.strip_prefix("// ")).map(ToOwned::to_owned);
            if let Some(old) = res.insert(name, (path, test)) {