diff --git a/common/djangoapps/course_modes/admin.py b/common/djangoapps/course_modes/admin.py
index 0181c0c50b..d738dd3673 100644
--- a/common/djangoapps/course_modes/admin.py
+++ b/common/djangoapps/course_modes/admin.py
@@ -4,7 +4,6 @@ from django.conf import settings
 from django.contrib import admin
 from django.http.request import QueryDict
 from django.utils.translation import ugettext_lazy as _
-from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import CourseKey
 from pytz import UTC, timezone
 
@@ -22,7 +21,6 @@ from course_modes.models import CourseMode, CourseModeExpirationConfig
 from lms.djangoapps.verify_student import models as verification_models
 from openedx.core.lib.courses import clean_course_id
 from util.date_utils import get_time_display
-from xmodule.modulestore.django import modulestore
 
 COURSE_MODE_SLUG_CHOICES = [(key, enrollment_mode['display_name']) for key, enrollment_mode in six.iteritems(settings.COURSE_ENROLLMENT_MODES)]
 
diff --git a/common/djangoapps/enrollment/tests/test_views.py b/common/djangoapps/enrollment/tests/test_views.py
index edaff1fe41..bc70c20928 100644
--- a/common/djangoapps/enrollment/tests/test_views.py
+++ b/common/djangoapps/enrollment/tests/test_views.py
@@ -40,11 +40,7 @@ from openedx.core.djangoapps.user_api.models import (
 from openedx.core.lib.django_test_client_utils import get_absolute_url
 from openedx.features.enterprise_support.tests import FAKE_ENTERPRISE_CUSTOMER
 from openedx.features.enterprise_support.tests.mixins.enterprise import EnterpriseServiceMockMixin
-from student.models import (
-    CourseEnrollment,
-    get_retired_username_by_username,
-    get_retired_email_by_email,
-)
+from student.models import CourseEnrollment
 from student.roles import CourseStaffRole
 from student.tests.factories import AdminFactory, UserFactory, SuperuserFactory
 from util.models import RateLimitConfiguration
diff --git a/common/djangoapps/enrollment/views.py b/common/djangoapps/enrollment/views.py
index 246d8a0cd2..f502fde54f 100644
--- a/common/djangoapps/enrollment/views.py
+++ b/common/djangoapps/enrollment/views.py
@@ -6,8 +6,6 @@ consist primarily of authentication, request validation, and serialization.
 import logging
 
 from course_modes.models import CourseMode
-from django.db import transaction
-from django.contrib.auth import get_user_model
 from django.core.exceptions import ObjectDoesNotExist
 from django.utils.decorators import method_decorator
 from edx_rest_framework_extensions.auth.jwt.authentication import JwtAuthentication
diff --git a/common/djangoapps/entitlements/api/v1/views.py b/common/djangoapps/entitlements/api/v1/views.py
index c8bf87203f..5559c1225c 100644
--- a/common/djangoapps/entitlements/api/v1/views.py
+++ b/common/djangoapps/entitlements/api/v1/views.py
@@ -3,7 +3,6 @@ import logging
 from django.db import IntegrityError, transaction
 from django.db.models import Q
 from django.http import HttpResponseBadRequest
-from django.utils import timezone
 from django_filters.rest_framework import DjangoFilterBackend
 from edx_rest_framework_extensions.auth.jwt.authentication import JwtAuthentication
 from edx_rest_framework_extensions.paginators import DefaultPagination
diff --git a/common/djangoapps/pipeline_mako/tests/test_render.py b/common/djangoapps/pipeline_mako/tests/test_render.py
index c2b12d1b29..86a08d2f13 100644
--- a/common/djangoapps/pipeline_mako/tests/test_render.py
+++ b/common/djangoapps/pipeline_mako/tests/test_render.py
@@ -3,10 +3,8 @@
 from unittest import skipUnless
 
 import ddt
-import os
 from django.conf import settings
 from django.test import TestCase
-from paver.easy import call_task
 from mock import patch
 
 from pipeline_mako import compressed_css, compressed_js, render_require_js_path_overrides
diff --git a/common/djangoapps/student/management/commands/bulk_unenroll.py b/common/djangoapps/student/management/commands/bulk_unenroll.py
index 6671b92bc7..16009318b4 100644
--- a/common/djangoapps/student/management/commands/bulk_unenroll.py
+++ b/common/djangoapps/student/management/commands/bulk_unenroll.py
@@ -2,7 +2,7 @@ import logging
 
 import unicodecsv
 from django.core.exceptions import ObjectDoesNotExist
-from django.core.management.base import BaseCommand, CommandError
+from django.core.management.base import BaseCommand
 from django.db.models import Q
 from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import CourseKey
diff --git a/common/djangoapps/student/management/commands/manage_user.py b/common/djangoapps/student/management/commands/manage_user.py
index f7cc172ac1..1a08714533 100644
--- a/common/djangoapps/student/management/commands/manage_user.py
+++ b/common/djangoapps/student/management/commands/manage_user.py
@@ -5,7 +5,7 @@ Django users, set/unset permission bits, and associate groups by name.
 
 from django.contrib.auth import get_user_model
 from django.contrib.auth.hashers import is_password_usable
-from django.contrib.auth.models import Group, BaseUserManager
+from django.contrib.auth.models import Group
 from django.core.management.base import BaseCommand, CommandError
 from django.db import transaction
 from django.utils.translation import gettext as _
diff --git a/common/djangoapps/student/management/tests/test_bulk_unenroll.py b/common/djangoapps/student/management/tests/test_bulk_unenroll.py
index a86352bf3e..d9984a0d42 100644
--- a/common/djangoapps/student/management/tests/test_bulk_unenroll.py
+++ b/common/djangoapps/student/management/tests/test_bulk_unenroll.py
@@ -7,7 +7,7 @@ from testfixtures import LogCapture
 
 from course_modes.tests.factories import CourseModeFactory
 from student.tests.factories import UserFactory
-from student.models import CourseEnrollment, User
+from student.models import CourseEnrollment
 
 
 LOGGER_NAME = 'student.management.commands.bulk_unenroll'
diff --git a/common/djangoapps/student/models.py b/common/djangoapps/student/models.py
index 2906d2fd66..130e09b9e5 100644
--- a/common/djangoapps/student/models.py
+++ b/common/djangoapps/student/models.py
@@ -30,7 +30,7 @@ from django.contrib.auth.models import User
 from django.contrib.auth.signals import user_logged_in, user_logged_out
 from django.core.cache import cache
 from django.core.exceptions import MultipleObjectsReturned, ObjectDoesNotExist
-from django.db import IntegrityError, models, transaction
+from django.db import IntegrityError, models
 from django.db.models import Count, Q
 from django.db.models.signals import post_save, pre_save
 from django.db.utils import ProgrammingError
diff --git a/common/djangoapps/student/tests/test_activate_account.py b/common/djangoapps/student/tests/test_activate_account.py
index 099516b53a..aacbbbcf21 100644
--- a/common/djangoapps/student/tests/test_activate_account.py
+++ b/common/djangoapps/student/tests/test_activate_account.py
@@ -7,7 +7,6 @@ from django.urls import reverse
 from django.test import TestCase, override_settings
 from mock import patch
 
-from edxmako.shortcuts import render_to_string
 from openedx.core.djangoapps.site_configuration import helpers as configuration_helpers
 from openedx.core.djangoapps.user_api.config.waffle import PREVENT_AUTH_USER_WRITES, SYSTEM_MAINTENANCE_MSG, waffle
 from student.models import Registration
diff --git a/common/djangoapps/student/tests/test_email.py b/common/djangoapps/student/tests/test_email.py
index babf69167b..f0ba4135b4 100644
--- a/common/djangoapps/student/tests/test_email.py
+++ b/common/djangoapps/student/tests/test_email.py
@@ -17,14 +17,12 @@ from edxmako.shortcuts import render_to_string
 from openedx.core.djangoapps.ace_common.tests.mixins import EmailTemplateTagMixin
 from openedx.core.djangoapps.site_configuration import helpers as configuration_helpers
 from openedx.core.djangoapps.theming.tests.test_util import with_comprehensive_theme
-from openedx.core.djangoapps.site_configuration.tests.test_util import with_site_configuration
 from openedx.core.djangoapps.user_api.config.waffle import PREVENT_AUTH_USER_WRITES, SYSTEM_MAINTENANCE_MSG, waffle
 from openedx.core.djangolib.testing.utils import CacheIsolationTestCase, CacheIsolationMixin
 from student.models import (
     PendingEmailChange,
     Registration,
     UserProfile,
-    get_retired_email_by_email
 )
 from openedx.core.lib.request_utils import safe_get_host
 from student.tests.factories import PendingEmailChangeFactory, RegistrationFactory, UserFactory
diff --git a/common/djangoapps/student/tests/test_enrollment.py b/common/djangoapps/student/tests/test_enrollment.py
index 0574e7e106..aebf47f78f 100644
--- a/common/djangoapps/student/tests/test_enrollment.py
+++ b/common/djangoapps/student/tests/test_enrollment.py
@@ -13,7 +13,6 @@ from course_modes.tests.factories import CourseModeFactory
 from openedx.core.djangoapps.embargo.test_utils import restrict_course
 from student.models import (
     CourseEnrollment,
-    CourseEnrollmentAllowed,
     CourseFullError,
     EnrollmentClosedError,
     SCORE_RECALCULATION_DELAY_ON_ENROLLMENT_UPDATE,
diff --git a/common/djangoapps/student/tests/test_events.py b/common/djangoapps/student/tests/test_events.py
index ccb1f058d2..7b66b985b4 100644
--- a/common/djangoapps/student/tests/test_events.py
+++ b/common/djangoapps/student/tests/test_events.py
@@ -7,7 +7,7 @@ from django.db.utils import IntegrityError
 from django.test import TestCase
 from django_countries.fields import Country
 
-from student.models import CourseEnrollmentAllowed, PasswordHistory
+from student.models import CourseEnrollmentAllowed
 from student.tests.factories import UserFactory, CourseEnrollmentAllowedFactory
 from student.tests.tests import UserSettingsEventTestMixin
 
diff --git a/common/djangoapps/util/tests/test_db.py b/common/djangoapps/util/tests/test_db.py
index b3c3b2dd13..7a54dd467f 100644
--- a/common/djangoapps/util/tests/test_db.py
+++ b/common/djangoapps/util/tests/test_db.py
@@ -5,7 +5,6 @@ import time
 import unittest
 
 import ddt
-import pytest
 from django.contrib.auth.models import User
 from django.core.management import call_command
 from django.db import IntegrityError, connection
diff --git a/common/djangoapps/util/tests/test_password_policy_validators.py b/common/djangoapps/util/tests/test_password_policy_validators.py
index 0ce7fe2c96..3ba9dc929d 100644
--- a/common/djangoapps/util/tests/test_password_policy_validators.py
+++ b/common/djangoapps/util/tests/test_password_policy_validators.py
@@ -1,10 +1,9 @@
 # -*- coding: utf-8 -*-
 """Tests for util.password_policy_validators module."""
-import mock
+
 import unittest
 
 from ddt import data, ddt, unpack
-from django.conf import settings
 from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError
 from django.test.utils import override_settings
diff --git a/common/lib/calc/calc/calc.py b/common/lib/calc/calc/calc.py
index 397e1bdc67..03af7d9b1c 100644
--- a/common/lib/calc/calc/calc.py
+++ b/common/lib/calc/calc/calc.py
@@ -9,7 +9,6 @@ import numbers
 import operator
 
 import numpy
-import scipy.constants
 from pyparsing import (
     CaselessLiteral,
     Combine,
diff --git a/common/lib/xmodule/xmodule/modulestore/tests/test_split_modulestore.py b/common/lib/xmodule/xmodule/modulestore/tests/test_split_modulestore.py
index 61100e4d71..f276255822 100644
--- a/common/lib/xmodule/xmodule/modulestore/tests/test_split_modulestore.py
+++ b/common/lib/xmodule/xmodule/modulestore/tests/test_split_modulestore.py
@@ -9,7 +9,6 @@ import random
 import re
 import unittest
 import os
-import uuid
 
 import ddt
 from contracts import contract
diff --git a/common/lib/xmodule/xmodule/modulestore/tests/test_split_w_old_mongo.py b/common/lib/xmodule/xmodule/modulestore/tests/test_split_w_old_mongo.py
index c8121bc769..15f677469c 100644
--- a/common/lib/xmodule/xmodule/modulestore/tests/test_split_w_old_mongo.py
+++ b/common/lib/xmodule/xmodule/modulestore/tests/test_split_w_old_mongo.py
@@ -1,7 +1,6 @@
 import datetime
 import random
 import unittest
-import uuid
 import os
 import mock
 import pytest
diff --git a/common/lib/xmodule/xmodule/modulestore/tests/utils.py b/common/lib/xmodule/xmodule/modulestore/tests/utils.py
index d9b964be97..19103f2083 100644
--- a/common/lib/xmodule/xmodule/modulestore/tests/utils.py
+++ b/common/lib/xmodule/xmodule/modulestore/tests/utils.py
@@ -4,7 +4,6 @@ Helper classes and methods for running modulestore tests without Django.
 from uuid import uuid4
 import io
 import os
-import random
 
 from contextlib import contextmanager, nested
 from importlib import import_module
diff --git a/common/lib/xmodule/xmodule/tests/test_import_static.py b/common/lib/xmodule/xmodule/tests/test_import_static.py
index 7db84f5c42..723507d996 100644
--- a/common/lib/xmodule/xmodule/tests/test_import_static.py
+++ b/common/lib/xmodule/xmodule/tests/test_import_static.py
@@ -2,9 +2,8 @@
 Tests that check that we ignore the appropriate files when importing courses.
 """
 import unittest
-import ddt
 from mock import Mock
-import os
+
 from xmodule.modulestore.xml_importer import StaticContentImporter
 from opaque_keys.edx.locator import CourseLocator
 from xmodule.tests import DATA_DIR
diff --git a/common/lib/xmodule/xmodule/tests/test_mongo_utils.py b/common/lib/xmodule/xmodule/tests/test_mongo_utils.py
index 05b2399b19..2f50f85329 100644
--- a/common/lib/xmodule/xmodule/tests/test_mongo_utils.py
+++ b/common/lib/xmodule/xmodule/tests/test_mongo_utils.py
@@ -8,8 +8,6 @@ from uuid import uuid4
 
 from pymongo import ReadPreference
 
-from django.conf import settings
-
 from xmodule.mongo_utils import connect_to_mongodb
 
 
diff --git a/common/lib/xmodule/xmodule/tests/test_vertical.py b/common/lib/xmodule/xmodule/tests/test_vertical.py
index c272b95be3..e91bec4ef6 100644
--- a/common/lib/xmodule/xmodule/tests/test_vertical.py
+++ b/common/lib/xmodule/xmodule/tests/test_vertical.py
@@ -11,7 +11,6 @@ import json
 import ddt
 from fs.memoryfs import MemoryFS
 from mock import Mock, patch
-import six
 
 from . import get_test_system
 from .helpers import StubUserService
diff --git a/common/lib/xmodule/xmodule/vertical_block.py b/common/lib/xmodule/xmodule/vertical_block.py
index 1cc44d69de..ec6d2100fc 100644
--- a/common/lib/xmodule/xmodule/vertical_block.py
+++ b/common/lib/xmodule/xmodule/vertical_block.py
@@ -20,8 +20,6 @@ from xmodule.util.xmodule_django import add_webpack_to_fragment
 from xmodule.x_module import STUDENT_VIEW, XModuleFields
 from xmodule.xml_module import XmlParserMixin
 
-import webpack_loader.utils
-
 log = logging.getLogger(__name__)
 
 # HACK: This shouldn't be hard-coded to two types
diff --git a/common/lib/xmodule/xmodule/video_module/transcripts_utils.py b/common/lib/xmodule/xmodule/video_module/transcripts_utils.py
index f734b474a1..bd1dee52c4 100644
--- a/common/lib/xmodule/xmodule/video_module/transcripts_utils.py
+++ b/common/lib/xmodule/xmodule/video_module/transcripts_utils.py
@@ -12,11 +12,9 @@ import logging
 from pysrt import SubRipTime, SubRipItem, SubRipFile
 from pysrt.srtexc import Error
 from lxml import etree
-from opaque_keys.edx.locator import BlockUsageLocator
 from HTMLParser import HTMLParser
 from six import text_type
 
-from xmodule.modulestore.django import modulestore
 from xmodule.exceptions import NotFoundError
 from xmodule.contentstore.content import StaticContent
 from xmodule.contentstore.django import contentstore
diff --git a/common/lib/xmodule/xmodule/video_module/video_handlers.py b/common/lib/xmodule/xmodule/video_module/video_handlers.py
index dca0a5d105..837f8625bc 100644
--- a/common/lib/xmodule/xmodule/video_module/video_handlers.py
+++ b/common/lib/xmodule/xmodule/video_module/video_handlers.py
@@ -25,7 +25,6 @@ from .transcripts_utils import (
     clean_video_id,
     get_or_create_sjson,
     generate_sjson_for_all_speeds,
-    save_to_store,
     subs_filename,
     Transcript,
     TranscriptException,