diff --git a/analytics/lib/counts.py b/analytics/lib/counts.py
index b7f51f707e..e76a7f89fb 100644
--- a/analytics/lib/counts.py
+++ b/analytics/lib/counts.py
@@ -2,11 +2,11 @@ import time
 from collections import OrderedDict, defaultdict
 from datetime import datetime, timedelta
 import logging
-from typing import Any, Callable, Dict, List, \
+from typing import Callable, Dict, List, \
     Optional, Tuple, Type, Union
 
 from django.conf import settings
-from django.db import connection, models
+from django.db import connection
 from django.db.models import F
 
 from analytics.models import BaseCount, \
diff --git a/analytics/management/commands/check_analytics_state.py b/analytics/management/commands/check_analytics_state.py
index 0bfc5aa657..c9639c6dd2 100644
--- a/analytics/management/commands/check_analytics_state.py
+++ b/analytics/management/commands/check_analytics_state.py
@@ -1,10 +1,9 @@
-from argparse import ArgumentParser
 from datetime import timedelta
 
 from django.core.management.base import BaseCommand
 from django.utils.timezone import now as timezone_now
 
-from analytics.models import InstallationCount, installation_epoch, \
+from analytics.models import installation_epoch, \
     last_successful_fill
 from analytics.lib.counts import COUNT_STATS, CountStat
 from zerver.lib.timestamp import floor_to_hour, floor_to_day, verify_UTC, \
@@ -12,7 +11,6 @@ from zerver.lib.timestamp import floor_to_hour, floor_to_day, verify_UTC, \
 from zerver.models import Realm
 
 import os
-import sys
 import time
 from typing import Any, Dict
 
diff --git a/analytics/management/commands/populate_analytics_db.py b/analytics/management/commands/populate_analytics_db.py
index e1bbb43c0c..dc3a2c5437 100644
--- a/analytics/management/commands/populate_analytics_db.py
+++ b/analytics/management/commands/populate_analytics_db.py
@@ -1,6 +1,6 @@
 
 from datetime import datetime, timedelta
-from typing import Any, Dict, List, Mapping, Optional, Type, Union
+from typing import Any, Dict, List, Mapping, Optional, Type
 
 from django.core.management.base import BaseCommand
 from django.utils.timezone import now as timezone_now
@@ -13,7 +13,7 @@ from analytics.models import BaseCount, FillState, RealmCount, UserCount, \
     StreamCount, InstallationCount
 from zerver.lib.actions import do_change_is_admin
 from zerver.lib.timestamp import floor_to_day
-from zerver.models import Realm, UserProfile, Stream, Message, Client, \
+from zerver.models import Realm, UserProfile, Stream, Client, \
     RealmAuditLog, Recipient
 
 class Command(BaseCommand):
diff --git a/analytics/management/commands/realm_stats.py b/analytics/management/commands/realm_stats.py
index f41ee54deb..6ddcfce310 100644
--- a/analytics/management/commands/realm_stats.py
+++ b/analytics/management/commands/realm_stats.py
@@ -2,7 +2,6 @@ import datetime
 from argparse import ArgumentParser
 from typing import Any, List
 
-import pytz
 from django.core.management.base import BaseCommand
 from django.db.models import Count
 from django.utils.timezone import now as timezone_now
diff --git a/analytics/models.py b/analytics/models.py
index f18254bba7..3b40a35700 100644
--- a/analytics/models.py
+++ b/analytics/models.py
@@ -1,10 +1,10 @@
 import datetime
-from typing import Any, Dict, Optional, Tuple, Union
+from typing import Optional
 
 from django.db import models
 
 from zerver.lib.timestamp import floor_to_day
-from zerver.models import Realm, Recipient, Stream, UserProfile
+from zerver.models import Realm, Stream, UserProfile
 
 class FillState(models.Model):
     property = models.CharField(max_length=40, unique=True)  # type: str
diff --git a/analytics/tests/test_counts.py b/analytics/tests/test_counts.py
index e44fbd7a6a..e4727107fa 100644
--- a/analytics/tests/test_counts.py
+++ b/analytics/tests/test_counts.py
@@ -1,6 +1,6 @@
 
 from datetime import datetime, timedelta
-from typing import Any, Dict, List, Optional, Tuple, Type, Union
+from typing import Any, Dict, List, Optional, Tuple, Type
 
 import ujson
 from django.apps import apps
@@ -10,14 +10,14 @@ from django.test import TestCase
 from django.utils.timezone import now as timezone_now
 from django.utils.timezone import utc as timezone_utc
 
-from analytics.lib.counts import COUNT_STATS, CountStat, DataCollector, \
+from analytics.lib.counts import COUNT_STATS, CountStat, \
     DependentCountStat, LoggingCountStat, do_aggregate_to_summary_table, \
     do_drop_all_analytics_tables, do_drop_single_stat, \
     do_fill_count_stat_at_hour, do_increment_logging_stat, \
     process_count_stat, sql_data_collector
 from analytics.models import BaseCount, \
     FillState, InstallationCount, RealmCount, StreamCount, \
-    UserCount, installation_epoch, last_successful_fill
+    UserCount, installation_epoch
 from zerver.lib.actions import do_activate_user, do_create_user, \
     do_deactivate_user, do_reactivate_user, update_user_activity_interval, \
     do_invite_users, do_revoke_user_invite, do_resend_user_invite_email, \
diff --git a/analytics/tests/test_views.py b/analytics/tests/test_views.py
index 097d013b5d..bf618d9ba0 100644
--- a/analytics/tests/test_views.py
+++ b/analytics/tests/test_views.py
@@ -1,5 +1,5 @@
 from datetime import datetime, timedelta
-from typing import Dict, List, Optional
+from typing import List, Optional
 
 import mock
 from django.utils.timezone import utc
@@ -8,8 +8,8 @@ from analytics.lib.counts import COUNT_STATS, CountStat
 from analytics.lib.time_utils import time_range
 from analytics.models import FillState, \
     RealmCount, UserCount, last_successful_fill
-from analytics.views import get_chart_data, rewrite_client_arrays, \
-    sort_by_totals, sort_client_labels, stats
+from analytics.views import rewrite_client_arrays, \
+    sort_by_totals, sort_client_labels
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.timestamp import ceiling_to_day, \
     ceiling_to_hour, datetime_to_timestamp
diff --git a/confirmation/models.py b/confirmation/models.py
index e00755f01b..4cc1b5a2fe 100644
--- a/confirmation/models.py
+++ b/confirmation/models.py
@@ -16,12 +16,11 @@ from django.http import HttpRequest, HttpResponse
 from django.shortcuts import render
 from django.utils.timezone import now as timezone_now
 
-from zerver.lib.utils import generate_random_token
 from zerver.models import PreregistrationUser, EmailChangeStatus, MultiuseInvite, \
     UserProfile, Realm
 from random import SystemRandom
 import string
-from typing import Any, Dict, Optional, Union
+from typing import Dict, Optional, Union
 
 class ConfirmationKeyException(Exception):
     WRONG_LENGTH = 1
diff --git a/confirmation/settings.py b/confirmation/settings.py
index 779141ab52..5cd4d0bd2b 100644
--- a/confirmation/settings.py
+++ b/confirmation/settings.py
@@ -2,8 +2,6 @@
 
 # Copyright: (c) 2008, Jarek Zgoda <jarek.zgoda@gmail.com>
 
-from typing import Any, Dict
-
 __revision__ = '$Id: settings.py 12 2008-11-23 19:38:52Z jarek.zgoda $'
 
 STATUS_ACTIVE = 1
diff --git a/corporate/lib/stripe.py b/corporate/lib/stripe.py
index f5cb607638..7959d9dfda 100644
--- a/corporate/lib/stripe.py
+++ b/corporate/lib/stripe.py
@@ -14,7 +14,6 @@ from django.utils.timezone import now as timezone_now
 from django.core.signing import Signer
 import stripe
 
-from zerver.lib.exceptions import JsonableError
 from zerver.lib.logging_util import log_to_file
 from zerver.lib.timestamp import datetime_to_timestamp, timestamp_to_datetime
 from zerver.lib.utils import generate_random_token
diff --git a/corporate/models.py b/corporate/models.py
index 1296478e46..299b7807c1 100644
--- a/corporate/models.py
+++ b/corporate/models.py
@@ -5,7 +5,7 @@ from typing import Optional
 from django.db import models
 from django.db.models import CASCADE
 
-from zerver.models import Realm, RealmAuditLog
+from zerver.models import Realm
 
 class Customer(models.Model):
     realm = models.OneToOneField(Realm, on_delete=CASCADE)  # type: Realm
diff --git a/corporate/tests/test_stripe.py b/corporate/tests/test_stripe.py
index 2aceaad02c..aa12ce9fee 100644
--- a/corporate/tests/test_stripe.py
+++ b/corporate/tests/test_stripe.py
@@ -1,6 +1,6 @@
 from datetime import datetime, timedelta
 from decimal import Decimal
-from functools import partial, wraps
+from functools import wraps
 from mock import Mock, patch
 import operator
 import os
@@ -11,7 +11,6 @@ import ujson
 import json
 
 from django.core import signing
-from django.core.management import call_command
 from django.core.urlresolvers import get_resolver
 from django.http import HttpResponse
 from django.utils.timezone import utc as timezone_utc
@@ -19,22 +18,20 @@ from django.utils.timezone import utc as timezone_utc
 import stripe
 
 from zerver.lib.actions import do_deactivate_user, do_create_user, \
-    do_activate_user, do_reactivate_user, do_create_realm
+    do_activate_user, do_reactivate_user
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.timestamp import timestamp_to_datetime, datetime_to_timestamp
 from zerver.models import Realm, UserProfile, get_realm, RealmAuditLog
 from corporate.lib.stripe import catch_stripe_errors, attach_discount_to_realm, \
     get_seat_count, sign_string, unsign_string, \
-    BillingError, StripeCardError, StripeConnectionError, stripe_get_customer, \
-    DEFAULT_INVOICE_DAYS_UNTIL_DUE, MIN_INVOICED_LICENSES, do_create_stripe_customer, \
-    add_months, next_month, next_renewal_date, renewal_amount, \
+    BillingError, StripeCardError, stripe_get_customer, \
+    MIN_INVOICED_LICENSES, \
+    add_months, next_month, \
     compute_plan_parameters, update_or_create_stripe_customer, \
     process_initial_upgrade, add_plan_renewal_to_license_ledger_if_needed, \
     update_license_ledger_if_needed, update_license_ledger_for_automanaged_plan, \
     invoice_plan, invoice_plans_as_needed
 from corporate.models import Customer, CustomerPlan, LicenseLedger
-from corporate.views import payment_method_string
-import corporate.urls
 
 CallableT = TypeVar('CallableT', bound=Callable[..., Any])
 
diff --git a/zilencer/management/commands/populate_db.py b/zilencer/management/commands/populate_db.py
index ddc32694ef..625f1ae289 100644
--- a/zilencer/management/commands/populate_db.py
+++ b/zilencer/management/commands/populate_db.py
@@ -1,5 +1,4 @@
 import itertools
-import mock
 import os
 import random
 from typing import Any, Callable, Dict, Iterable, List, \
@@ -21,13 +20,12 @@ from zerver.lib.cache import cache_set
 from zerver.lib.generate_test_data import create_test_data
 from zerver.lib.onboarding import create_if_missing_realm_internal_bots
 from zerver.lib.push_notifications import logger as push_notifications_logger
-from zerver.lib.upload import upload_backend
 from zerver.lib.users import add_service
 from zerver.lib.url_preview.preview import CACHE_NAME as PREVIEW_CACHE_NAME
 from zerver.lib.user_groups import create_user_group
 from zerver.lib.utils import generate_api_key
 from zerver.models import CustomProfileField, DefaultStream, Message, Realm, RealmAuditLog, \
-    RealmDomain, RealmEmoji, Recipient, Service, Stream, Subscription, \
+    RealmDomain, Recipient, Service, Stream, Subscription, \
     UserMessage, UserPresence, UserProfile, clear_database, \
     email_to_username, get_client, get_huddle, get_realm, get_stream, \
     get_system_bot, get_user, get_user_profile_by_id
diff --git a/zproject/backends.py b/zproject/backends.py
index fa8233af56..817a1dca4b 100644
--- a/zproject/backends.py
+++ b/zproject/backends.py
@@ -1,5 +1,5 @@
 import logging
-from typing import Any, Dict, List, Set, Tuple, Optional, Sequence
+from typing import Any, Dict, List, Set, Tuple, Optional
 
 from django_auth_ldap.backend import LDAPBackend, _LDAPUser
 import django.contrib.auth
@@ -14,15 +14,11 @@ from social_core.backends.github import GithubOAuth2, GithubOrganizationOAuth2,
 from social_core.backends.azuread import AzureADOAuth2
 from social_core.backends.base import BaseAuth
 from social_core.backends.oauth import BaseOAuth2
-from social_core.utils import handle_http_errors
 from social_core.exceptions import AuthFailed, SocialAuthBaseException
-from social_django.models import DjangoStorage
-from social_django.strategy import DjangoStrategy
 
 from zerver.lib.actions import do_create_user, do_reactivate_user, do_deactivate_user
 from zerver.lib.dev_ldap_directory import init_fakeldap
 from zerver.lib.request import JsonableError
-from zerver.lib.subdomains import user_matches_subdomain, get_subdomain
 from zerver.lib.users import check_full_name
 from zerver.models import PreregistrationUser, UserProfile, Realm, get_default_stream_groups, \
     get_user_profile_by_id, remote_user_to_email, email_to_username, get_realm, \
diff --git a/zproject/prod_settings_template.py b/zproject/prod_settings_template.py
index f74f71459a..1f18f010d5 100644
--- a/zproject/prod_settings_template.py
+++ b/zproject/prod_settings_template.py
@@ -401,7 +401,7 @@ EMAIL_GATEWAY_IMAP_FOLDER = "INBOX"
 # optionally using LDAP as an authentication mechanism.
 
 import ldap
-from django_auth_ldap.config import LDAPSearch, GroupOfNamesType, LDAPSearchUnion
+from django_auth_ldap.config import LDAPSearch
 
 ########
 # LDAP integration, part 1: Connecting to the LDAP server.
diff --git a/zproject/settings.py b/zproject/settings.py
index acbff7873a..e12cf0138a 100644
--- a/zproject/settings.py
+++ b/zproject/settings.py
@@ -12,7 +12,6 @@
 ########################################################################
 from copy import deepcopy
 import os
-import platform
 import time
 import sys
 from typing import Any, Optional
diff --git a/zproject/urls.py b/zproject/urls.py
index e35a0af40a..d026c0cea5 100644
--- a/zproject/urls.py
+++ b/zproject/urls.py
@@ -8,7 +8,7 @@ import os
 import zerver.forms
 from zproject import dev_urls
 from zproject.legacy_urls import legacy_urls
-from zerver.views.integrations import IntegrationView, APIView, MarkdownDirectoryView
+from zerver.views.integrations import IntegrationView, MarkdownDirectoryView
 from zerver.lib.integrations import WEBHOOK_INTEGRATIONS
 from zerver.webhooks import github_dispatcher
 
diff --git a/zthumbor/loaders/helpers.py b/zthumbor/loaders/helpers.py
index 3fb372754e..9f68114ed7 100644
--- a/zthumbor/loaders/helpers.py
+++ b/zthumbor/loaders/helpers.py
@@ -4,13 +4,8 @@ from __future__ import absolute_import
 import os
 import re
 import sys
-from six.moves.urllib.parse import urlparse
 from typing import Any, Text, Tuple, Optional
 
-if False:
-    # See https://zulip.readthedocs.io/en/latest/testing/mypy.html#mypy-in-production-scripts
-    from thumbor.context import Context
-
 ZULIP_PATH = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath('__file__'))))
 sys.path.append(ZULIP_PATH)