async def METHOD_NAME(self):
    await self.pet_api.add_pet(self.pet)
    calls = [self.pet_api.get_pet_by_id(self.pet.id),
             self.pet_api.get_pet_by_id(self.pet.id)]
    responses, _ = await asyncio.wait(calls)
    for response in responses:
        self.assertEqual(response.result().id, self.pet.id)
    self.assertEqual(len(responses), 2)