def METHOD_NAME(self):
    """`from_timestamp` is a wrapper around `datetime.fromtimestamp`
    that also includes UTC information.
    """
    ts = 0
    datetime_from_ts = datetime.datetime.fromtimestamp(ts, tz=pytz.UTC)
    util_from_ts = from_timestamp(ts)
    # The util function returns the right datetime object from a timestamp.
    assert datetime_from_ts == util_from_ts
    assert datetime_from_ts.strftime("%Y-%m-%d") == "1970-01-01"
    assert util_from_ts.strftime("%Y-%m-%d") == "1970-01-01"
    # The UTC information for this datetime object is the pytz UTC value.
    assert util_from_ts.tzinfo is not None
    assert util_from_ts.tzinfo == pytz.UTC