We have a static_assert function in ty_extensions, which takes in a bool (or a value that can be coerced to a bool). astral-sh/ruff#21743 recently updated several tests to use a static_assert(actual == expected) pattern. If that fails, all that we can show is the value that was expected to be True. @sharkdp suggested an analogous static_assert_eq, which would perform the same test, but which would be able to print out a nicer diagnostic in case the test fails.