Run until complete and asyncio gather throwing a runtime warning

Question

I am creating a program where a new Class is instantiated, let's call it Profile, and then data is streamed that would update the profile. Periodically the periodic function is also supposed to perform a checkup inside the instantiated profile, to make sure things are in order.

def _run():
    stream = Stream(...)
    api = API(...)

    try:
        _LOG.info("Generating Data.")
        
        ...

        async def periodic():
            while True:
                if not api.get_clock().is_open:
                    raise RuntimeError()
                await asyncio.sleep(60)
                items = api.get_items()
                for item in items:
                    ...class.do_checkup(item)...

        loop = asyncio.get_event_loop()
        loop.run_until_complete(asyncio.gather(
            stream.run(),
            periodic(),
        ))
    except KeyboardInterrupt:
        # stream.stop()
        # loop.close()
        loop.stop()
        exit(0)
    except RuntimeError:
        _LOG.info('...')
    except Exception as e:
        _LOG.error(e)
    finally:
        _LOG.info("Trying to re-establish connection.")
        time.sleep(3)
        # TODO: restart here
        # _run()

The code above though, when trying to stop it, complains that:

UP (BASE): Generating Data.
...
.../__main__.py:89: RuntimeWarning: coroutine '_run.<locals>.periodic' was never awaited
  _LOG.error(e)
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
keyboard interrupt, bye
UP (BASE): An asyncio.Future, a coroutine or an awaitable is required

What is the correct way to have asyncio run periodic correctly?