async/await was actually added in 3.5 (although the @ test in since-3.5.py is shorter). The specific change used by since-3.7.py is that await is now allowed inside an f-string (inside an async function). The specific change used by since-3.11.py is that an async comprehension is now allowed inside a normal comprehension (inside an async function). These changes are, of course, not new primitives—just fixes to allow existing primitives to be combined in ways that should intuitively work.