#
# SPDX-License-Identifier: Apache-2.0
-from __future__ import absolute_import
-
-from builtins import object
import arvados
import copy
-import mock
import os
import random
import re
import unittest
import parameterized
+from unittest import mock
+
from . import run_test_server
from arvados._ranges import Range, LocatorAndRange
from arvados.collection import Collection, CollectionReader