Hi there,
unfortunately there’s currently no easy way to accomplish this. You can follow issue #785 to be notified when this is improved, and in the meantime you can try some of the workarounds mentioned there. See this comment and this comment for details of both approaches. You might use __ITER this way for teardown as well, though it will be awkward.
This will likely be made easier after the upcoming v0.27.0 release, but no ETAs yet 