async def METHOD_NAME(self):
    one = await self.UUIDPkModel.create()
    two1 = await self.UUIDM2MRelatedModel.create()
    two2 = await self.UUIDM2MRelatedModel.create()
    await one.peers.add(two1, two2)
    self.assertEqual(set(await one.peers), {two1, two2})
    self.assertEqual(await two1.models, [one])
    self.assertEqual(await two2.models, [one])