diff --git a/common/lib/xmodule/xmodule/tests/helpers.py b/common/lib/xmodule/xmodule/tests/helpers.py
index 732dff94f8..c46e8c6285 100644
--- a/common/lib/xmodule/xmodule/tests/helpers.py
+++ b/common/lib/xmodule/xmodule/tests/helpers.py
@@ -2,10 +2,12 @@
 Utility methods for unit tests.
 """
 
-import filecmp
-from path import Path as path
+from __future__ import absolute_import
 
-from xblock.reference.user_service import XBlockUser, UserService
+import filecmp
+
+from path import Path as path
+from xblock.reference.user_service import UserService, XBlockUser
 
 
 def directories_equal(directory1, directory2):
diff --git a/common/lib/xmodule/xmodule/tests/test_annotator_mixin.py b/common/lib/xmodule/xmodule/tests/test_annotator_mixin.py
index 38a55ecd8f..4e7dda4bd7 100644
--- a/common/lib/xmodule/xmodule/tests/test_annotator_mixin.py
+++ b/common/lib/xmodule/xmodule/tests/test_annotator_mixin.py
@@ -2,10 +2,13 @@
 This test will run for annotator_mixin.py
 """
 
+from __future__ import absolute_import
+
 import unittest
+
 from lxml import etree
 
-from xmodule.annotator_mixin import get_instructions, get_extension, html_to_text
+from xmodule.annotator_mixin import get_extension, get_instructions, html_to_text
 
 
 class HelperFunctionTest(unittest.TestCase):
diff --git a/common/lib/xmodule/xmodule/tests/test_delay_between_attempts.py b/common/lib/xmodule/xmodule/tests/test_delay_between_attempts.py
index 71f064b348..83dc482e3d 100644
--- a/common/lib/xmodule/xmodule/tests/test_delay_between_attempts.py
+++ b/common/lib/xmodule/xmodule/tests/test_delay_between_attempts.py
@@ -7,21 +7,23 @@ of the submit_problem method of a capa module when the "delay between quiz
 submissions" setting is set to different values
 """
 
-import unittest
-import textwrap
+from __future__ import absolute_import
+
 import datetime
+import textwrap
+import unittest
 
 from mock import Mock
-
-import xmodule
-from xmodule.capa_module import ProblemBlock
 from opaque_keys.edx.locator import BlockUsageLocator, CourseLocator
+from pytz import UTC
 from xblock.field_data import DictFieldData
 from xblock.fields import ScopeIds
 from xblock.scorable import Score
 
+import xmodule
+from xmodule.capa_module import ProblemBlock
+
 from . import get_test_system
-from pytz import UTC
 
 
 class CapaFactoryWithDelay(object):
diff --git a/common/lib/xmodule/xmodule/tests/test_editing_module.py b/common/lib/xmodule/xmodule/tests/test_editing_module.py
index c0439040cd..d51d5e97e5 100644
--- a/common/lib/xmodule/xmodule/tests/test_editing_module.py
+++ b/common/lib/xmodule/xmodule/tests/test_editing_module.py
@@ -1,15 +1,17 @@
 """ Tests for editing descriptors"""
-import unittest
-import os
+from __future__ import absolute_import
+
 import logging
+import os
+import unittest
 
 from mock import Mock
-from pkg_resources import resource_string
 from opaque_keys.edx.locator import BlockUsageLocator, CourseLocator
-from xmodule.editing_module import TabsEditingDescriptor
+from pkg_resources import resource_string
 from xblock.field_data import DictFieldData
 from xblock.fields import ScopeIds
 
+from xmodule.editing_module import TabsEditingDescriptor
 from xmodule.tests import get_test_descriptor_system
 
 log = logging.getLogger(__name__)
diff --git a/common/lib/xmodule/xmodule/tests/test_library_root.py b/common/lib/xmodule/xmodule/tests/test_library_root.py
index 06d4a4b238..673c5158d1 100644
--- a/common/lib/xmodule/xmodule/tests/test_library_root.py
+++ b/common/lib/xmodule/xmodule/tests/test_library_root.py
@@ -2,14 +2,16 @@
 """
 Basic unit tests for LibraryRoot
 """
-from mock import patch
+from __future__ import absolute_import
 
+from mock import patch
+from six.moves import range
 from web_fragments.fragment import Fragment
 from xblock.runtime import Runtime as VanillaRuntime
-from xmodule.x_module import AUTHOR_VIEW
 
-from xmodule.modulestore.tests.factories import LibraryFactory, ItemFactory
+from xmodule.modulestore.tests.factories import ItemFactory, LibraryFactory
 from xmodule.modulestore.tests.utils import MixedSplitTestCase
+from xmodule.x_module import AUTHOR_VIEW
 
 dummy_render = lambda block, _: Fragment(block.data)  # pylint: disable=invalid-name
 
diff --git a/common/lib/xmodule/xmodule/tests/test_library_tools.py b/common/lib/xmodule/xmodule/tests/test_library_tools.py
index 6afd82fc35..6587ba532f 100644
--- a/common/lib/xmodule/xmodule/tests/test_library_tools.py
+++ b/common/lib/xmodule/xmodule/tests/test_library_tools.py
@@ -1,7 +1,10 @@
 """
 Tests for library tools service.
 """
+from __future__ import absolute_import
+
 from mock import patch
+
 from xmodule.library_tools import LibraryToolsService
 from xmodule.modulestore.tests.factories import LibraryFactory
 from xmodule.modulestore.tests.utils import MixedSplitTestCase
diff --git a/common/lib/xmodule/xmodule/tests/test_lti_unit.py b/common/lib/xmodule/xmodule/tests/test_lti_unit.py
index ba53770dd1..861d183096 100644
--- a/common/lib/xmodule/xmodule/tests/test_lti_unit.py
+++ b/common/lib/xmodule/xmodule/tests/test_lti_unit.py
@@ -1,19 +1,24 @@
 # -*- coding: utf-8 -*-
 """Test for LTI Xmodule functional logic."""
 
+from __future__ import absolute_import
+
 import datetime
-from pytz import UTC
-from mock import Mock, patch, PropertyMock
 import textwrap
-from lxml import etree
-from webob.request import Request
 from copy import copy
+
+import six.moves.urllib.error
+import six.moves.urllib.parse
+import six.moves.urllib.request
+from lxml import etree
+from mock import Mock, PropertyMock, patch
+from pytz import UTC
 from six import text_type
-import urllib
+from webob.request import Request
 
 from xmodule.fields import Timedelta
-from xmodule.lti_module import LTIDescriptor
 from xmodule.lti_2_util import LTIError
+from xmodule.lti_module import LTIDescriptor
 
 from . import LogicTest
 
@@ -61,7 +66,7 @@ class LTIModuleTest(LogicTest):
             self.xmodule.runtime.hostname
         )
 
-        sourced_id = u':'.join(urllib.quote(i) for i in (self.lti_id, self.unquoted_resource_link_id, self.user_id))
+        sourced_id = u':'.join(six.moves.urllib.parse.quote(i) for i in (self.lti_id, self.unquoted_resource_link_id, self.user_id))
 
         self.defaults = {
             'namespace': "http://www.imsglobal.org/services/ltiv1p1/xsd/imsoms_v1p0",
@@ -277,7 +282,7 @@ class LTIModuleTest(LogicTest):
         self.assertEqual(self.xmodule.module_score, float(self.defaults['grade']))
 
     def test_user_id(self):
-        expected_user_id = text_type(urllib.quote(self.xmodule.runtime.anonymous_student_id))
+        expected_user_id = text_type(six.moves.urllib.parse.quote(self.xmodule.runtime.anonymous_student_id))
         real_user_id = self.xmodule.get_user_id()
         self.assertEqual(real_user_id, expected_user_id)
 
@@ -296,12 +301,12 @@ class LTIModuleTest(LogicTest):
     def test_resource_link_id(self):
         with patch('xmodule.lti_module.LTIModule.location', new_callable=PropertyMock):
             self.xmodule.location.html_id = lambda: 'i4x-2-3-lti-31de800015cf4afb973356dbe81496df'
-            expected_resource_link_id = text_type(urllib.quote(self.unquoted_resource_link_id))
+            expected_resource_link_id = text_type(six.moves.urllib.parse.quote(self.unquoted_resource_link_id))
             real_resource_link_id = self.xmodule.get_resource_link_id()
             self.assertEqual(real_resource_link_id, expected_resource_link_id)
 
     def test_lis_result_sourcedid(self):
-        expected_sourced_id = u':'.join(urllib.quote(i) for i in (
+        expected_sourced_id = u':'.join(six.moves.urllib.parse.quote(i) for i in (
             text_type(self.system.course_id),
             self.xmodule.get_resource_link_id(),
             self.user_id
diff --git a/common/lib/xmodule/xmodule/tests/test_randomize_module.py b/common/lib/xmodule/xmodule/tests/test_randomize_module.py
index 48c5220b21..ae19ed16e4 100644
--- a/common/lib/xmodule/xmodule/tests/test_randomize_module.py
+++ b/common/lib/xmodule/xmodule/tests/test_randomize_module.py
@@ -1,17 +1,19 @@
 """
 Test cases covering workflows and behaviors for the Randomize XModule
 """
+from __future__ import absolute_import
+
 import unittest
 from datetime import datetime, timedelta
 
-from pytz import UTC
 from opaque_keys.edx.locator import BlockUsageLocator
+from pytz import UTC
 from xblock.fields import ScopeIds
+
 from xmodule.randomize_module import RandomizeModule
 
 from .test_course_module import DummySystem as DummyImportSystem
 
-
 ORG = 'test_org'
 COURSE = 'test_course'
 
diff --git a/common/lib/xmodule/xmodule/tests/test_utils_django.py b/common/lib/xmodule/xmodule/tests/test_utils_django.py
index 34c6e4cdd4..67afcddf7e 100644
--- a/common/lib/xmodule/xmodule/tests/test_utils_django.py
+++ b/common/lib/xmodule/xmodule/tests/test_utils_django.py
@@ -1,7 +1,10 @@
 """Tests for methods defined in util/django.py"""
-from xmodule.util.xmodule_django import get_current_request, get_current_request_hostname
+from __future__ import absolute_import
+
 from unittest import TestCase
 
+from xmodule.util.xmodule_django import get_current_request, get_current_request_hostname
+
 
 class UtilDjangoTests(TestCase):
     """
diff --git a/common/lib/xmodule/xmodule/tests/test_video.py b/common/lib/xmodule/xmodule/tests/test_video.py
index 042648920f..21b5b0ce3a 100644
--- a/common/lib/xmodule/xmodule/tests/test_video.py
+++ b/common/lib/xmodule/xmodule/tests/test_video.py
@@ -12,32 +12,35 @@ You can then use the CourseFactory and XModuleItemFactory as defined
 in common/lib/xmodule/xmodule/modulestore/tests/factories.py to create
 the course, section, subsection, unit, etc.
 """
+from __future__ import absolute_import
+
+import datetime
 import json
 import os
-import unittest
-import datetime
 import shutil
+import unittest
+from tempfile import mkdtemp
 from uuid import uuid4
 
-from tempfile import mkdtemp
-from lxml import etree
-from mock import ANY, Mock, patch, MagicMock
 import ddt
-
+import six
 from django.conf import settings
 from django.test import TestCase
 from django.test.utils import override_settings
-
 from fs.osfs import OSFS
-from opaque_keys.edx.locator import CourseLocator
+from lxml import etree
+from mock import ANY, MagicMock, Mock, patch
 from opaque_keys.edx.keys import CourseKey
+from opaque_keys.edx.locator import CourseLocator
+from six.moves import zip
 from xblock.field_data import DictFieldData
 from xblock.fields import ScopeIds
 
 from xmodule.tests import get_test_descriptor_system
 from xmodule.validation import StudioValidationMessage
-from xmodule.video_module import VideoBlock, create_youtube_string, EXPORT_IMPORT_STATIC_DIR
-from xmodule.video_module.transcripts_utils import download_youtube_subs, save_to_store, save_subs_to_store
+from xmodule.video_module import EXPORT_IMPORT_STATIC_DIR, VideoBlock, create_youtube_string
+from xmodule.video_module.transcripts_utils import download_youtube_subs, save_subs_to_store, save_to_store
+
 from .test_import import DummySystem
 
 SRT_FILEDATA = '''
@@ -640,7 +643,7 @@ class VideoBlockImportTestCase(TestCase):
         def mock_val_import(xml, edx_video_id, resource_fs, static_dir, external_transcripts, course_id):
             """Mock edxval.api.import_from_xml"""
             self.assertEqual(xml.tag, 'video_asset')
-            self.assertEqual(dict(xml.items()), {'mock_attr': ''})
+            self.assertEqual(dict(list(xml.items())), {'mock_attr': ''})
             self.assertEqual(edx_video_id, 'test_edx_video_id')
             self.assertEqual(static_dir, EXPORT_IMPORT_STATIC_DIR)
             self.assertIsNotNone(resource_fs)
@@ -760,7 +763,7 @@ class VideoExportTestCase(VideoBlockTestBase):
             video_id=edx_video_id,
             static_dir=EXPORT_IMPORT_STATIC_DIR,
             resource_fs=self.file_system,
-            course_id=unicode(self.descriptor.runtime.course_id.for_branch(None)),
+            course_id=six.text_type(self.descriptor.runtime.course_id.for_branch(None)),
         )
 
     @patch('xmodule.video_module.video_module.edxval_api')