Issue to track a problem with pytest-asyncio which is preventing us from moving to the latest version. https://github.com/cylc/cylc-flow/blob/4ac6f3d10500a8df6ddfca24c23b1ac7b040d7df/setup.cfg#L121-L122 Upstream issue: https://github.com/pytest-dev/pytest-asyncio/issues/706 See also: https://github.com/cylc/cylc-rose/issues/299