On a slow machine I'm getting the following failed error for mysql:

        # value will be almost 60. Allow 1-2 seconds for all 20 rounds.
        self.assertAlmostEqual(
            float(self.server.client.additional_headers["X-RateLimit-Reset"]),
>           59, delta=1)
E       AssertionError: 57.706104 != 59 within 1 delta (1.2938959999999966 difference)

test/rest_common.py:1121: AssertionError

Should we live with this failing occasionally or make the error margin a little higher (I'd suggest 5 which should never fail and is about 10%)?