diff --git a/.github/workflows/code-quality.yml b/.github/workflows/code-quality.yml
index 013e2e5547..bafeca8957 100644
--- a/.github/workflows/code-quality.yml
+++ b/.github/workflows/code-quality.yml
@@ -54,6 +54,38 @@ jobs:
         run: |
           black --check --diff src
 
+  flake8:
+    name: Code style (flake8)
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up backend environment
+        uses: maykinmedia/setup-django-backend@v1
+        with:
+          apt-packages: 'libxml2-dev libxmlsec1-dev libxmlsec1-openssl gdal-bin'
+          python-version: '3.11'
+          setup-node: 'no'
+      - name: Run flake8
+        id: flake8
+        run: |
+          flake8 src 2>&1 | tee flake8_output.txt
+          result_code=${PIPESTATUS[0]}
+          report="$(cat flake8_output.txt)"
+          report="${report//$'\n'/'%0A'}"  # escape newlines
+          echo "flake8_output=${report}" >> $GITHUB_OUTPUT
+          exit $result_code
+      - name: Emit flake8 flake8 output
+        if: ${{ failure() }}
+        run: |
+          echo "${{ steps.flake8.outputs.flake8_output }}"
+
+          echo 'flake8 found some issues' >> $GITHUB_STEP_SUMMARY
+          echo '' >> $GITHUB_STEP_SUMMARY
+          echo '| File | Line | Column | Issue |' >> $GITHUB_STEP_SUMMARY
+          echo '| :--- | ---- | ------ | :---- |' >> $GITHUB_STEP_SUMMARY
+          python ./bin/flake8_summary.py "${{ steps.flake8.outputs.flake8_output }}" >> $GITHUB_STEP_SUMMARY
+
   migrations:
     name: Check for model changes not present in the migrations
     runs-on: ubuntu-latest
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 99aceacd45..e215f40def 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -4,17 +4,17 @@ If you want to contribute, we ask you to follow these guidelines.
 
 ## Reporting bugs
 
-If you have encountered a bug in this project, please check if an issue already 
-exists in the list of existing [issues][issues]. If such an issue does not 
-exist, you can create a [new issue][new_issue]. When writing the bug report, 
+If you have encountered a bug in this project, please check if an issue already
+exists in the list of existing [issues][issues]. If such an issue does not
+exist, you can create a [new issue][new_issue]. When writing the bug report,
 try to add a clear example that shows how to reproduce said bug.
 
 ## Adding new features
 
-Before making making changes to the code, we advise you to first check the list 
-of existing [issues][issues] for this project to see if an issue for the 
-suggested changes already exists. If such an issue does not exist, you can 
-create a [new issue][new_issue]. Creating an issue gives an opportunity for 
+Before making making changes to the code, we advise you to first check the list
+of existing [issues][issues] for this project to see if an issue for the
+suggested changes already exists. If such an issue does not exist, you can
+create a [new issue][new_issue]. Creating an issue gives an opportunity for
 other developers to give tips even before you start coding.
 
 ### Code style
@@ -22,21 +22,22 @@ other developers to give tips even before you start coding.
 To keep the code clean and readable, this project uses:
 
 - [`isort`](https://github.com/timothycrosley/isort) to order the imports
-- [`black`](https://github.com/psf/black) to format the Python code and keep diffs for 
+- [`black`](https://github.com/psf/black) to format the Python code and keep diffs for
   pull requests small
-- [`prettier`](https://github.com/prettier/prettier) to format the JS code and keep diffs for 
+- [`flake8`](https://github.com/PyCQA/flake8) to clean up code (removing unused imports, etc.)
+- [`prettier`](https://github.com/prettier/prettier) to format the JS code and keep diffs for
   pull requests small
-Whenever a branch is pushed or a pull request is made, the code will be checked 
-in CI by the tools mentioned above, so make sure to install these tools and run 
+Whenever a branch is pushed or a pull request is made, the code will be checked
+in CI by the tools mentioned above, so make sure to install these tools and run
 them locally before pushing branches/making pull requests.
 
-This project aims to meet the criteria of the 
-[Standard for Public Code][Standard_for_Public_Code]. Please make sure that 
+This project aims to meet the criteria of the
+[Standard for Public Code][Standard_for_Public_Code]. Please make sure that
 your pull requests are compliant, that will make the reviews quicker.
 
 ### Forking the repository
 
-In order to implement changes to this project when you do not have rights for 
+In order to implement changes to this project when you do not have rights for
 this [repository][repository], you must first fork the repository. Once the
  repository is forked, you can clone it to your local machine.
 
@@ -46,26 +47,26 @@ On your local machine, create a new branch, and name it like:
 - `feature/some-new-feature`, if the changes implement a new feature
 - `issue/some-issue`, if the changes fix an issue
 
-Once you have made changes or additions to the code, you can commit them (try 
-to keep the commit message descriptive but short). If an issue already exists 
-in the list of existing [issues][issues] for the changes you made, be sure to 
-format your commit message like 
-`:gitmoji: Fixes #<issue_id> -- description of changes made`, where 
-`<issue_id>` corresponds to the number of the issue on GitHub. To demonstrate 
-that the changes implement the new feature/fix the issue, make sure to also add 
+Once you have made changes or additions to the code, you can commit them (try
+to keep the commit message descriptive but short). If an issue already exists
+in the list of existing [issues][issues] for the changes you made, be sure to
+format your commit message like
+`:gitmoji: Fixes #<issue_id> -- description of changes made`, where
+`<issue_id>` corresponds to the number of the issue on GitHub. To demonstrate
+that the changes implement the new feature/fix the issue, make sure to also add
 tests to the existing Django testsuite.
 
 ### Making a pull request
 
-If all changes have been committed, you can push the branch to your fork of the 
-repository and create a pull request to the `develop` branch of this project's 
-repository. Your pull request will be reviewed, if applicable, feedback will be 
+If all changes have been committed, you can push the branch to your fork of the
+repository and create a pull request to the `develop` branch of this project's
+repository. Your pull request will be reviewed, if applicable, feedback will be
 given and if everything is approved, it will be merged.
 
 ### Reviews on releases
 
-All pull requests will be reviewed by a project member before they are merged 
-to a release branch. 
+All pull requests will be reviewed by a project member before they are merged
+to a release branch.
 
 
 [issues]: https://github.com/maykinmedia/open-inwoner/issues
diff --git a/bin/flake8_summary.py b/bin/flake8_summary.py
new file mode 100644
index 0000000000..7a05d5df42
--- /dev/null
+++ b/bin/flake8_summary.py
@@ -0,0 +1,12 @@
+#!/usr/bin/env python
+import sys
+
+
+def main(flake8_output: str):
+    for line in flake8_output.splitlines():
+        file, line, column, error = line.split(":", 3)
+        print(f"| {file} | {line} | {column} | {error.strip()} |")
+
+
+if __name__ == "__main__":
+    main(sys.argv[1])
diff --git a/requirements/ci.txt b/requirements/ci.txt
index 20c328fe1d..32fac297e2 100644
--- a/requirements/ci.txt
+++ b/requirements/ci.txt
@@ -41,6 +41,8 @@ billiard==3.6.4.0
     #   -c requirements/base.txt
     #   -r requirements/base.txt
     #   celery
+black==22.12.0
+    # via -r requirements/test-tools.in
 boltons==21.0.0
     # via
     #   -c requirements/base.txt
@@ -81,6 +83,7 @@ click==8.1.3
     # via
     #   -c requirements/base.txt
     #   -r requirements/base.txt
+    #   black
     #   celery
     #   click-didyoumean
     #   click-plugins
@@ -499,6 +502,8 @@ factory-boy==3.2.0
     # via -r requirements/test-tools.in
 faker==9.9.0
     # via factory-boy
+flake8==3.9.2
+    # via -r requirements/test-tools.in
 fontawesomefree==6.4.2
     # via
     #   -c requirements/base.txt
@@ -568,7 +573,9 @@ isodate==0.6.1
     #   -r requirements/base.txt
     #   maykin-python3-saml
 isort==5.9.3
-    # via pylint
+    # via
+    #   -r requirements/test-tools.in
+    #   pylint
 josepy==1.13.0
     # via
     #   -c requirements/base.txt
@@ -628,7 +635,9 @@ maykin-python3-saml==1.14.0.post0
     #   -r requirements/base.txt
     #   django-digid-eherkenning
 mccabe==0.6.1
-    # via pylint
+    # via
+    #   flake8
+    #   pylint
 messagebird==2.1.0
     # via
     #   -c requirements/base.txt
@@ -642,6 +651,8 @@ mozilla-django-oidc-db==0.12.0
     # via
     #   -c requirements/base.txt
     #   -r requirements/base.txt
+mypy-extensions==1.0.0
+    # via black
 notifications-api-common==0.2.2
     # via
     #   -c requirements/base.txt
@@ -670,6 +681,8 @@ packaging==23.0
     #   -c requirements/base.txt
     #   -r requirements/base.txt
     #   djangocms-text-ckeditor
+pathspec==0.12.1
+    # via black
 pep8==1.7.1
     # via -r requirements/test-tools.in
 phonenumbers==8.12.33
@@ -685,7 +698,9 @@ pillow==10.1.0
     #   reportlab
     #   weasyprint
 platformdirs==2.4.0
-    # via pylint
+    # via
+    #   black
+    #   pylint
 playwright==1.41.0
     # via
     #   -c requirements/base.txt
@@ -704,6 +719,8 @@ psycopg2==2.9.9
     # via
     #   -c requirements/base.txt
     #   -r requirements/base.txt
+pycodestyle==2.7.0
+    # via flake8
 pycparser==2.20
     # via
     #   -c requirements/base.txt
@@ -719,6 +736,8 @@ pyee==11.0.1
     #   -c requirements/base.txt
     #   -r requirements/base.txt
     #   playwright
+pyflakes==2.3.1
+    # via flake8
 pyjwt==2.8.0
     # via
     #   -c requirements/base.txt
diff --git a/requirements/dev.in b/requirements/dev.in
index 9b141a3f8b..0961cc18db 100644
--- a/requirements/dev.in
+++ b/requirements/dev.in
@@ -4,9 +4,6 @@
 pip-tools
 
 # Code formatting
-black
-isort
-flake8
 bandit
 
 # Debug tooling
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 405252cce3..0fdefc1ac5 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -53,7 +53,9 @@ billiard==3.6.4.0
     #   -r requirements/ci.txt
     #   celery
 black==22.12.0
-    # via -r requirements/dev.in
+    # via
+    #   -c requirements/ci.txt
+    #   -r requirements/ci.txt
 blinker==1.7.0
     # via flask
 boltons==21.0.0
@@ -555,7 +557,9 @@ faker==9.9.0
     #   -r requirements/ci.txt
     #   factory-boy
 flake8==3.9.2
-    # via -r requirements/dev.in
+    # via
+    #   -c requirements/ci.txt
+    #   -r requirements/ci.txt
 flask==3.0.0
     # via
     #   flask-basicauth
@@ -654,7 +658,6 @@ isort==5.9.3
     # via
     #   -c requirements/ci.txt
     #   -r requirements/ci.txt
-    #   -r requirements/dev.in
     #   pylint
 itsdangerous==2.1.2
     # via flask
@@ -750,8 +753,11 @@ mozilla-django-oidc-db==0.12.0
     #   -r requirements/ci.txt
 msgpack==1.0.7
     # via locust
-mypy-extensions==0.4.3
-    # via black
+mypy-extensions==1.0.0
+    # via
+    #   -c requirements/ci.txt
+    #   -r requirements/ci.txt
+    #   black
 notifications-api-common==0.2.2
     # via
     #   -c requirements/ci.txt
@@ -782,8 +788,11 @@ packaging==23.0
     #   build
     #   djangocms-text-ckeditor
     #   sphinx
-pathspec==0.9.0
-    # via black
+pathspec==0.12.1
+    # via
+    #   -c requirements/ci.txt
+    #   -r requirements/ci.txt
+    #   black
 pbr==5.9.0
     # via stevedore
 pep517==0.11.0
@@ -834,6 +843,8 @@ psycopg2==2.9.9
     #   -r requirements/ci.txt
 pycodestyle==2.7.0
     # via
+    #   -c requirements/ci.txt
+    #   -r requirements/ci.txt
     #   autopep8
     #   flake8
 pycparser==2.20
@@ -852,7 +863,10 @@ pyee==11.0.1
     #   -r requirements/ci.txt
     #   playwright
 pyflakes==2.3.1
-    # via flake8
+    # via
+    #   -c requirements/ci.txt
+    #   -r requirements/ci.txt
+    #   flake8
 pygments==2.12.0
     # via sphinx
 pyjwt==2.8.0
diff --git a/requirements/test-tools.in b/requirements/test-tools.in
index b208bd2b9a..decbda49a3 100644
--- a/requirements/test-tools.in
+++ b/requirements/test-tools.in
@@ -11,5 +11,10 @@ pyquery  # integrates with webtest
 requests-mock
 tblib
 
+# Code formatting
+black
+isort
+flake8
+
 # DigidLocal
 pyopenssl
diff --git a/requirements/test-tools.txt b/requirements/test-tools.txt
deleted file mode 100644
index 4f554446d7..0000000000
--- a/requirements/test-tools.txt
+++ /dev/null
@@ -1,104 +0,0 @@
-#
-# This file is autogenerated by pip-compile with Python 3.11
-# by the following command:
-#
-#    pip-compile requirements/test-tools.in
-#
-astroid==3.0.2
-    # via pylint
-beautifulsoup4==4.10.0
-    # via
-    #   -c requirements/base.txt
-    #   webtest
-certifi==2023.11.17
-    # via
-    #   -c requirements/base.txt
-    #   requests
-cffi==1.15.0
-    # via
-    #   -c requirements/base.txt
-    #   cryptography
-charset-normalizer==2.0.6
-    # via
-    #   -c requirements/base.txt
-    #   requests
-coverage==4.5.4
-    # via -r requirements/test-tools.in
-cryptography==41.0.7
-    # via
-    #   -c requirements/base.txt
-    #   pyopenssl
-cssselect==1.2.0
-    # via pyquery
-dill==0.3.7
-    # via pylint
-django-webtest==1.9.11
-    # via -r requirements/test-tools.in
-factory-boy==3.3.0
-    # via -r requirements/test-tools.in
-faker==22.5.0
-    # via factory-boy
-freezegun==1.4.0
-    # via -r requirements/test-tools.in
-idna==3.2
-    # via
-    #   -c requirements/base.txt
-    #   requests
-isort==5.13.2
-    # via pylint
-lxml==4.9.1
-    # via
-    #   -c requirements/base.txt
-    #   pyquery
-mccabe==0.7.0
-    # via pylint
-pep8==1.7.1
-    # via -r requirements/test-tools.in
-platformdirs==4.1.0
-    # via pylint
-pycparser==2.20
-    # via
-    #   -c requirements/base.txt
-    #   cffi
-pylint==3.0.3
-    # via -r requirements/test-tools.in
-pyopenssl==23.3.0
-    # via
-    #   -c requirements/base.txt
-    #   -r requirements/test-tools.in
-pyquery==2.0.0
-    # via -r requirements/test-tools.in
-python-dateutil==2.8.2
-    # via
-    #   -c requirements/base.txt
-    #   faker
-    #   freezegun
-requests==2.31.0
-    # via
-    #   -c requirements/base.txt
-    #   requests-mock
-requests-mock==1.11.0
-    # via -r requirements/test-tools.in
-six==1.16.0
-    # via
-    #   -c requirements/base.txt
-    #   python-dateutil
-    #   requests-mock
-soupsieve==2.3.1
-    # via
-    #   -c requirements/base.txt
-    #   beautifulsoup4
-tblib==3.0.0
-    # via -r requirements/test-tools.in
-tomlkit==0.12.3
-    # via pylint
-urllib3==1.26.18
-    # via
-    #   -c requirements/base.txt
-    #   requests
-waitress==2.1.2
-    # via webtest
-webob==1.8.7
-    # via webtest
-webtest==3.0.0
-    # via django-webtest
diff --git a/setup.cfg b/setup.cfg
index c1b35519ad..279fe7c9f2 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,6 +3,17 @@
 ignore=W293,W291,E501,E261
 max-line-length=88
 exclude=migrations,static,media
+[flake8]
+ignore=E203,E261,E501,E731,F405,W293,W291,W503,F841,E741
+max-line-length=88
+exclude=
+    migrations
+    static
+    media
+    node_modules
+    src/open_inwoner/conf/local_example.py
+    # Might be created by developers:
+    src/open_inwoner/conf/local.py
 
 [isort]
 combine_as_imports = true
diff --git a/src/digid_eherkenning_oidc_generics/forms.py b/src/digid_eherkenning_oidc_generics/forms.py
index 27aec6e208..34a64ad445 100644
--- a/src/digid_eherkenning_oidc_generics/forms.py
+++ b/src/digid_eherkenning_oidc_generics/forms.py
@@ -1,7 +1,5 @@
 from copy import deepcopy
 
-from django.utils.translation import gettext_lazy as _
-
 from mozilla_django_oidc_db.constants import OIDC_MAPPING as _OIDC_MAPPING
 from mozilla_django_oidc_db.forms import OpenIDConnectConfigForm
 
diff --git a/src/digid_eherkenning_oidc_generics/views.py b/src/digid_eherkenning_oidc_generics/views.py
index 70633cad83..d9b32dbe2b 100644
--- a/src/digid_eherkenning_oidc_generics/views.py
+++ b/src/digid_eherkenning_oidc_generics/views.py
@@ -2,13 +2,10 @@
 
 from django.conf import settings
 from django.contrib import auth, messages
-from django.core.exceptions import ValidationError
-from django.db import IntegrityError, transaction
 from django.http import HttpResponseRedirect
 from django.shortcuts import resolve_url
 from django.urls import reverse, reverse_lazy
 from django.utils.translation import gettext_lazy as _
-from django.views import View
 from django.views.generic import View
 
 import requests
@@ -19,7 +16,6 @@
 from mozilla_django_oidc_db.views import (
     OIDC_ERROR_SESSION_KEY,
     OIDCCallbackView as _OIDCCallbackView,
-    get_exception_message,
 )
 
 from digid_eherkenning_oidc_generics.mixins import (
diff --git a/src/eherkenning/tests/test_mock_forms.py b/src/eherkenning/tests/test_mock_forms.py
index aa52ebf327..a70c55f639 100644
--- a/src/eherkenning/tests/test_mock_forms.py
+++ b/src/eherkenning/tests/test_mock_forms.py
@@ -1,4 +1,4 @@
-from django.test import TestCase, modify_settings, override_settings
+from django.test import TestCase
 
 from eherkenning.mock.idp.forms import eHerkenningPasswordLoginForm
 
diff --git a/src/open_inwoner/accounts/admin.py b/src/open_inwoner/accounts/admin.py
index 4a2af3f162..ebecd86293 100644
--- a/src/open_inwoner/accounts/admin.py
+++ b/src/open_inwoner/accounts/admin.py
@@ -3,9 +3,8 @@
 from django.contrib.auth.forms import UserChangeForm, UserCreationForm
 from django.contrib.auth.models import Group
 from django.forms import ValidationError
-from django.http.request import HttpRequest
-from django.urls import reverse, reverse_lazy
-from django.utils.html import format_html, format_html_join
+from django.urls import reverse
+from django.utils.html import format_html
 from django.utils.translation import ngettext, ugettext_lazy as _
 
 from image_cropping import ImageCroppingMixin
diff --git a/src/open_inwoner/accounts/apps.py b/src/open_inwoner/accounts/apps.py
index 2c3e95a722..a92fac11c3 100644
--- a/src/open_inwoner/accounts/apps.py
+++ b/src/open_inwoner/accounts/apps.py
@@ -25,7 +25,7 @@ def update_admin_index(sender, **kwargs):
 
     try:
         call_command("loaddata", "django-admin-index", verbosity=0, stdout=StringIO())
-    except:
+    except:  # noqa
         print("Error: Unable to load django-admin-index fixture!")
     print("Loaded django-admin-index fixture")
 
@@ -34,6 +34,9 @@ class AccountsConfig(AppConfig):
     name = "open_inwoner.accounts"
 
     def ready(self):
-        from .signals import log_user_login, log_user_logout  # register the signals
+        from .signals import (  # noqa:register the signals
+            log_user_login,
+            log_user_logout,
+        )
 
         post_migrate.connect(update_admin_index, sender=self)
diff --git a/src/open_inwoner/accounts/models.py b/src/open_inwoner/accounts/models.py
index b07c5da1f2..9781833106 100644
--- a/src/open_inwoner/accounts/models.py
+++ b/src/open_inwoner/accounts/models.py
@@ -1,9 +1,9 @@
 import os
-from datetime import date, timedelta
+from datetime import timedelta
 from uuid import uuid4
 
 from django.conf import settings
-from django.contrib.auth.models import AbstractBaseUser, Group, PermissionsMixin
+from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin
 from django.contrib.contenttypes.fields import GenericRelation
 from django.core.exceptions import ValidationError
 from django.db import models
diff --git a/src/open_inwoner/accounts/query.py b/src/open_inwoner/accounts/query.py
index 0a88444bb8..454d307edf 100644
--- a/src/open_inwoner/accounts/query.py
+++ b/src/open_inwoner/accounts/query.py
@@ -1,6 +1,11 @@
-from django.db.models import Case, F, Max, OuterRef, Q, Subquery, Value, When
+from typing import TYPE_CHECKING
+
+from django.db.models import Case, F, Max, OuterRef, Q, Subquery, When
 from django.db.models.query import QuerySet
 
+if TYPE_CHECKING:
+    from open_inwoner.accounts.models import User
+
 
 class MessageQuerySet(QuerySet):
     def get_conversations_for_user(self, user: "User") -> "MessageQuerySet":
diff --git a/src/open_inwoner/accounts/signals.py b/src/open_inwoner/accounts/signals.py
index bfd3090089..bf55a7405d 100644
--- a/src/open_inwoner/accounts/signals.py
+++ b/src/open_inwoner/accounts/signals.py
@@ -1,4 +1,3 @@
-from django.conf import settings
 from django.contrib.auth.signals import user_logged_in, user_logged_out
 from django.dispatch import receiver
 from django.urls import reverse
@@ -27,7 +26,7 @@ def log_user_login(sender, user, request, *args, **kwargs):
 
     try:
         digid_path = reverse("digid:acs")
-    except:
+    except:  # noqa
         digid_path = ""
 
     if current_path == reverse("admin:login"):
diff --git a/src/open_inwoner/accounts/tests/factories.py b/src/open_inwoner/accounts/tests/factories.py
index 710e908f27..18b6407ded 100644
--- a/src/open_inwoner/accounts/tests/factories.py
+++ b/src/open_inwoner/accounts/tests/factories.py
@@ -1,5 +1,4 @@
 import random
-from datetime import datetime, timezone
 from uuid import uuid4
 
 from django.core.files.uploadedfile import SimpleUploadedFile
diff --git a/src/open_inwoner/accounts/tests/test_action_views.py b/src/open_inwoner/accounts/tests/test_action_views.py
index a5688ab89b..c6fb613079 100644
--- a/src/open_inwoner/accounts/tests/test_action_views.py
+++ b/src/open_inwoner/accounts/tests/test_action_views.py
@@ -207,7 +207,7 @@ def test_action_list_export(self):
         self.assertEqual(response.status_code, 200)
         self.assertEqual(response.content_type, "application/pdf")
         self.assertEqual(
-            response["Content-Disposition"], f'attachment; filename="actions.pdf"'
+            response["Content-Disposition"], 'attachment; filename="actions.pdf"'
         )
         self.assertEqual(list(response.context["actions"]), [self.action])
 
diff --git a/src/open_inwoner/accounts/tests/test_auth.py b/src/open_inwoner/accounts/tests/test_auth.py
index c1636d2e28..f2c2898cae 100644
--- a/src/open_inwoner/accounts/tests/test_auth.py
+++ b/src/open_inwoner/accounts/tests/test_auth.py
@@ -1,10 +1,9 @@
-from datetime import date
 from unittest.mock import patch
 from urllib.parse import urlencode
 
 from django.contrib.sites.models import Site
 from django.core import mail
-from django.test import modify_settings, override_settings
+from django.test import override_settings
 from django.urls import reverse, reverse_lazy
 from django.utils.translation import gettext as _
 
@@ -20,7 +19,6 @@
 from open_inwoner.configurations.models import SiteConfiguration
 from open_inwoner.haalcentraal.tests.mixins import HaalCentraalMixin
 from open_inwoner.kvk.branches import get_kvk_branch_number
-from open_inwoner.kvk.models import KvKConfig
 from open_inwoner.kvk.tests.factories import CertificateFactory
 
 from ...cms.tests import cms_tools
diff --git a/src/open_inwoner/accounts/tests/test_oidc_views.py b/src/open_inwoner/accounts/tests/test_oidc_views.py
index 9640722f35..fb5346087d 100644
--- a/src/open_inwoner/accounts/tests/test_oidc_views.py
+++ b/src/open_inwoner/accounts/tests/test_oidc_views.py
@@ -5,7 +5,6 @@
 from django.core.exceptions import ValidationError
 from django.test import TestCase, modify_settings, override_settings
 from django.urls import reverse
-from django.utils.translation import gettext as _
 
 import requests_mock
 from furl import furl
diff --git a/src/open_inwoner/accounts/tests/test_profile_views.py b/src/open_inwoner/accounts/tests/test_profile_views.py
index 0beb05513c..d643e41eb4 100644
--- a/src/open_inwoner/accounts/tests/test_profile_views.py
+++ b/src/open_inwoner/accounts/tests/test_profile_views.py
@@ -12,7 +12,6 @@
 from cms import api
 from django_webtest import WebTest
 from pyquery import PyQuery as PQ
-from timeline_logger.models import TimelineLog
 from webtest import Upload
 
 from open_inwoner.accounts.choices import StatusChoices
@@ -35,7 +34,6 @@
 from .factories import (
     ActionFactory,
     DigidUserFactory,
-    DocumentFactory,
     UserFactory,
     eHerkenningUserFactory,
 )
diff --git a/src/open_inwoner/accounts/tests/test_user.py b/src/open_inwoner/accounts/tests/test_user.py
index 38b4574af2..50e777ef6a 100644
--- a/src/open_inwoner/accounts/tests/test_user.py
+++ b/src/open_inwoner/accounts/tests/test_user.py
@@ -1,9 +1,5 @@
-from datetime import date
-
 from django.test import TestCase
 
-from freezegun import freeze_time
-
 from open_inwoner.accounts.choices import LoginTypeChoices
 from open_inwoner.utils.hash import generate_email_from_string
 
diff --git a/src/open_inwoner/accounts/views/__init__.py b/src/open_inwoner/accounts/views/__init__.py
index 46324f7094..1174dbcd8d 100644
--- a/src/open_inwoner/accounts/views/__init__.py
+++ b/src/open_inwoner/accounts/views/__init__.py
@@ -36,3 +36,40 @@
 from .password_reset import PasswordResetView
 from .profile import EditProfileView, MyDataView, MyNotificationsView, MyProfileView
 from .registration import CustomRegistrationView, NecessaryFieldsUserView
+
+__all__ = [
+    "ActionCreateView",
+    "ActionExportView",
+    "ActionHistoryView",
+    "ActionListExportView",
+    "ActionListView",
+    "ActionPrivateMediaView",
+    "ActionUpdateStatusTagView",
+    "ActionUpdateView",
+    "CustomDigiDAssertionConsumerServiceMockView",
+    "CustomDigiDAssertionConsumerServiceView",
+    "CustomeHerkenningAssertionConsumerServiceMockView",
+    "CustomeHerkenningAssertionConsumerServiceView",
+    "LogPasswordChangeView",
+    "LogPasswordResetConfirmView",
+    "LogPasswordResetView",
+    "ContactApprovalView",
+    "ContactCreateView",
+    "ContactDeleteView",
+    "ContactListView",
+    "csrf_failure",
+    "DocumentPrivateMediaView",
+    "DocumentDeleteView",
+    "InviteAcceptView",
+    "AddPhoneNumberWizardView",
+    "CustomLoginView",
+    "ResendTokenView",
+    "VerifyTokenView",
+    "PasswordResetView",
+    "EditProfileView",
+    "MyDataView",
+    "MyNotificationsView",
+    "MyProfileView",
+    "CustomRegistrationView",
+    "NecessaryFieldsUserView",
+]
diff --git a/src/open_inwoner/accounts/views/login.py b/src/open_inwoner/accounts/views/login.py
index 8070afc54c..2ad38c5453 100644
--- a/src/open_inwoner/accounts/views/login.py
+++ b/src/open_inwoner/accounts/views/login.py
@@ -17,10 +17,6 @@
 from furl import furl
 from oath import totp
 
-from digid_eherkenning_oidc_generics.models import (
-    OpenIDConnectDigiDConfig,
-    OpenIDConnectEHerkenningConfig,
-)
 from open_inwoner.configurations.models import SiteConfiguration
 from open_inwoner.utils.mixins import ThrottleMixin
 from open_inwoner.utils.views import LogMixin
diff --git a/src/open_inwoner/accounts/views/profile.py b/src/open_inwoner/accounts/views/profile.py
index 1980feee5b..e9232a0a6a 100644
--- a/src/open_inwoner/accounts/views/profile.py
+++ b/src/open_inwoner/accounts/views/profile.py
@@ -1,20 +1,17 @@
-from datetime import date, datetime
+from datetime import date
 from typing import Generator, Union
 
-from django.conf import settings
 from django.contrib import messages
 from django.contrib.auth.mixins import LoginRequiredMixin
-from django.db.models import Q
 from django.forms.forms import Form
 from django.http import HttpResponseRedirect
 from django.shortcuts import redirect
 from django.urls import reverse, reverse_lazy
 from django.utils.functional import cached_property
 from django.utils.translation import gettext as _
-from django.views.generic import DetailView, FormView, TemplateView, UpdateView
+from django.views.generic import FormView, TemplateView, UpdateView
 
 from aldryn_apphooks_config.mixins import AppConfigMixin
-from glom import glom
 from view_breadcrumbs import BaseBreadcrumbMixin
 
 from open_inwoner.accounts.choices import (
@@ -31,7 +28,6 @@
 from open_inwoner.openklant.wrap import get_fetch_parameters
 from open_inwoner.plans.models import Plan
 from open_inwoner.questionnaire.models import QuestionnaireStep
-from open_inwoner.utils.mixins import ExportMixin
 from open_inwoner.utils.views import CommonPageMixin, LogMixin
 
 from ..forms import BrpUserForm, UserForm, UserNotificationsForm
diff --git a/src/open_inwoner/accounts/views/registration.py b/src/open_inwoner/accounts/views/registration.py
index 3368d2a96c..74f84a751e 100644
--- a/src/open_inwoner/accounts/views/registration.py
+++ b/src/open_inwoner/accounts/views/registration.py
@@ -58,7 +58,7 @@ def add_invitee(self, invite, user):
         #  update inviter - invitee relationship
         inviter_contacts = invite.inviter.user_contacts.all()
         invitee = invite.invitee
-        if not invitee in inviter_contacts:
+        if invitee not in inviter_contacts:
             invite.inviter.user_contacts.add(invitee)
 
 
diff --git a/src/open_inwoner/api/tests/test_views.py b/src/open_inwoner/api/tests/test_views.py
index 6ef456985f..a3e504fcdb 100644
--- a/src/open_inwoner/api/tests/test_views.py
+++ b/src/open_inwoner/api/tests/test_views.py
@@ -1,5 +1,3 @@
-from unicodedata import category
-
 from django.urls import reverse
 
 from rest_framework import status
diff --git a/src/open_inwoner/apimock/tests/test_views.py b/src/open_inwoner/apimock/tests/test_views.py
index ccb69d8d1c..a1ef5967f6 100644
--- a/src/open_inwoner/apimock/tests/test_views.py
+++ b/src/open_inwoner/apimock/tests/test_views.py
@@ -1,8 +1,6 @@
 from django.test import TestCase
 from django.urls import reverse
 
-from open_inwoner.accounts.tests.factories import UserFactory
-
 
 class APIMockTest(TestCase):
     def test_basic_response(self):
diff --git a/src/open_inwoner/cms/cases/tests/test_contactform.py b/src/open_inwoner/cms/cases/tests/test_contactform.py
index 1e8421128c..a97a37b372 100644
--- a/src/open_inwoner/cms/cases/tests/test_contactform.py
+++ b/src/open_inwoner/cms/cases/tests/test_contactform.py
@@ -12,7 +12,6 @@
     VertrouwelijkheidsAanduidingen,
 )
 from zgw_consumers.constants import APITypes
-from zgw_consumers.test import generate_oas_component
 
 from open_inwoner.accounts.tests.factories import (
     DigidUserFactory,
@@ -20,11 +19,7 @@
 )
 from open_inwoner.openklant.constants import Status
 from open_inwoner.openklant.models import OpenKlantConfig
-from open_inwoner.openklant.tests.data import (
-    CONTACTMOMENTEN_ROOT,
-    KLANTEN_ROOT,
-    MockAPIData,
-)
+from open_inwoner.openklant.tests.data import CONTACTMOMENTEN_ROOT, KLANTEN_ROOT
 from open_inwoner.openzaak.models import CatalogusConfig, OpenZaakConfig
 from open_inwoner.openzaak.tests.factories import ServiceFactory, ZaakTypeConfigFactory
 from open_inwoner.openzaak.tests.helpers import generate_oas_component_cached
diff --git a/src/open_inwoner/cms/cases/tests/test_htmx.py b/src/open_inwoner/cms/cases/tests/test_htmx.py
index 7ca122e555..a2880accab 100644
--- a/src/open_inwoner/cms/cases/tests/test_htmx.py
+++ b/src/open_inwoner/cms/cases/tests/test_htmx.py
@@ -18,11 +18,7 @@
 from open_inwoner.configurations.models import SiteConfiguration
 from open_inwoner.openklant.constants import Status
 from open_inwoner.openklant.models import OpenKlantConfig
-from open_inwoner.openklant.tests.data import (
-    CONTACTMOMENTEN_ROOT,
-    KLANTEN_ROOT,
-    MockAPIData,
-)
+from open_inwoner.openklant.tests.data import CONTACTMOMENTEN_ROOT, KLANTEN_ROOT
 from open_inwoner.openzaak.models import OpenZaakConfig
 from open_inwoner.openzaak.tests.factories import (
     ServiceFactory,
diff --git a/src/open_inwoner/cms/cases/views/__init__.py b/src/open_inwoner/cms/cases/views/__init__.py
index 7afdddfb80..29832011c4 100644
--- a/src/open_inwoner/cms/cases/views/__init__.py
+++ b/src/open_inwoner/cms/cases/views/__init__.py
@@ -6,3 +6,13 @@
     InnerCaseDetailView,
     OuterCaseDetailView,
 )
+
+__all__ = [
+    "InnerCaseListView",
+    "OuterCaseListView",
+    "CaseContactFormView",
+    "CaseDocumentDownloadView",
+    "CaseDocumentUploadFormView",
+    "InnerCaseDetailView",
+    "OuterCaseDetailView",
+]
diff --git a/src/open_inwoner/cms/plugins/cms_plugins/__init__.py b/src/open_inwoner/cms/plugins/cms_plugins/__init__.py
index c0440f6a04..ff68bb59e0 100644
--- a/src/open_inwoner/cms/plugins/cms_plugins/__init__.py
+++ b/src/open_inwoner/cms/plugins/cms_plugins/__init__.py
@@ -1,2 +1,7 @@
 from .userfeed import UserFeedPlugin
 from .videoplayer import VideoPlayerPlugin
+
+__all__ = [
+    "UserFeedPlugin",
+    "VideoPlayerPlugin",
+]
diff --git a/src/open_inwoner/cms/plugins/models/__init__.py b/src/open_inwoner/cms/plugins/models/__init__.py
index dfb2044a9e..71f41ff6d5 100644
--- a/src/open_inwoner/cms/plugins/models/__init__.py
+++ b/src/open_inwoner/cms/plugins/models/__init__.py
@@ -1,2 +1,7 @@
 from .userfeed import UserFeed
 from .videoplayer import VideoPlayer
+
+__all__ = [
+    "UserFeed",
+    "VideoPlayer",
+]
diff --git a/src/open_inwoner/cms/plugins/tests/test_userfeed.py b/src/open_inwoner/cms/plugins/tests/test_userfeed.py
index 44d75e0ae2..c38d6c704b 100644
--- a/src/open_inwoner/cms/plugins/tests/test_userfeed.py
+++ b/src/open_inwoner/cms/plugins/tests/test_userfeed.py
@@ -1,6 +1,6 @@
 from django.test import TestCase
 from django.utils.html import strip_tags
-from django.utils.translation import ngettext, ugettext as _
+from django.utils.translation import ngettext
 
 from pyquery import PyQuery as PQ
 
diff --git a/src/open_inwoner/cms/products/urls.py b/src/open_inwoner/cms/products/urls.py
index dc6ed8f4f9..f2991b7c75 100644
--- a/src/open_inwoner/cms/products/urls.py
+++ b/src/open_inwoner/cms/products/urls.py
@@ -41,23 +41,23 @@
         name="location_detail",
     ),
     path(
-        f"producten/<str:slug>/formulier/",
+        "producten/<str:slug>/formulier/",
         ProductFormView.as_view(),
         name="product_form",
     ),
     path(
         # Required to handle dynamic URL-paths appended by Open Forms.
-        f"producten/<str:slug>/formulier/<path:rest>",
+        "producten/<str:slug>/formulier/<path:rest>",
         ProductFormView.as_view(),
         name="product_form",
     ),
     path(
-        f"producten/<str:slug>/",
+        "producten/<str:slug>/",
         ProductDetailView.as_view(),
         name="product_detail",
     ),
     path(
-        f"producten/",
+        "producten/",
         RedirectView.as_view(pattern_name="products:category_list"),
         name="product_detail",
     ),
diff --git a/src/open_inwoner/cms/utils/plugin_mixins.py b/src/open_inwoner/cms/utils/plugin_mixins.py
index 608e1a524b..e8fe225e17 100644
--- a/src/open_inwoner/cms/utils/plugin_mixins.py
+++ b/src/open_inwoner/cms/utils/plugin_mixins.py
@@ -1,5 +1,4 @@
 from cms.models import Page
-from cms.plugin_base import CMSPluginBase
 
 
 class CMSActiveAppMixin:
diff --git a/src/open_inwoner/components/templatetags/anchor_menu_tags.py b/src/open_inwoner/components/templatetags/anchor_menu_tags.py
index b8edc59415..37bf0dd282 100644
--- a/src/open_inwoner/components/templatetags/anchor_menu_tags.py
+++ b/src/open_inwoner/components/templatetags/anchor_menu_tags.py
@@ -1,5 +1,4 @@
 from django import template
-from django.urls import reverse
 
 from open_inwoner.components.utils import ComponentNode
 
diff --git a/src/open_inwoner/components/templatetags/dropdown_tags.py b/src/open_inwoner/components/templatetags/dropdown_tags.py
index 38423f27d1..e6e3835a75 100644
--- a/src/open_inwoner/components/templatetags/dropdown_tags.py
+++ b/src/open_inwoner/components/templatetags/dropdown_tags.py
@@ -1,5 +1,4 @@
 from django import template
-from django.urls import NoReverseMatch, reverse
 
 from open_inwoner.components.utils import ContentsNode, parse_component_with_args
 
diff --git a/src/open_inwoner/components/templatetags/notification_tags.py b/src/open_inwoner/components/templatetags/notification_tags.py
index 3c0710e025..18bf8e10f2 100644
--- a/src/open_inwoner/components/templatetags/notification_tags.py
+++ b/src/open_inwoner/components/templatetags/notification_tags.py
@@ -1,7 +1,5 @@
 from django import template
 
-from open_inwoner.components.utils import ContentsNode, parse_component_with_args
-
 register = template.Library()
 
 
diff --git a/src/open_inwoner/components/templatetags/questionnaire_tags.py b/src/open_inwoner/components/templatetags/questionnaire_tags.py
index a3b8e22aa1..a948b04979 100644
--- a/src/open_inwoner/components/templatetags/questionnaire_tags.py
+++ b/src/open_inwoner/components/templatetags/questionnaire_tags.py
@@ -1,6 +1,5 @@
 from django import template
 from django.db.models import QuerySet
-from django.utils.translation import gettext as _
 
 register = template.Library()
 
diff --git a/src/open_inwoner/components/tests/test_header.py b/src/open_inwoner/components/tests/test_header.py
index eedfa69b05..ab00dbe81e 100644
--- a/src/open_inwoner/components/tests/test_header.py
+++ b/src/open_inwoner/components/tests/test_header.py
@@ -1,4 +1,4 @@
-from django.test import TestCase, modify_settings
+from django.test import TestCase
 
 from pyquery import PyQuery
 
diff --git a/src/open_inwoner/conf/base.py b/src/open_inwoner/conf/base.py
index d5a79594ca..f4734b4e11 100644
--- a/src/open_inwoner/conf/base.py
+++ b/src/open_inwoner/conf/base.py
@@ -1,9 +1,9 @@
 import os
 
-from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
 
 import sentry_sdk
+from easy_thumbnails.conf import Settings as thumbnail_settings
 from log_outgoing_requests.formatters import HttpFormatter
 
 from .utils import config, get_sentry_integrations
@@ -671,7 +671,6 @@
     },
 }
 
-from easy_thumbnails.conf import Settings as thumbnail_settings
 
 THUMBNAIL_PROCESSORS = (
     "filer.thumbnail_processors.scale_and_crop_with_subject_location",
diff --git a/src/open_inwoner/configurations/models.py b/src/open_inwoner/configurations/models.py
index 6ca9b3a130..829ef07faf 100644
--- a/src/open_inwoner/configurations/models.py
+++ b/src/open_inwoner/configurations/models.py
@@ -7,7 +7,6 @@
 
 from colorfield.fields import ColorField
 from django_better_admin_arrayfield.models.fields import ArrayField
-from filer.fields.file import FilerFileField
 from filer.fields.image import FilerImageField
 from ordered_model.models import OrderedModel, OrderedModelManager
 from solo.models import SingletonModel
diff --git a/src/open_inwoner/extended_sessions/tests/test_views.py b/src/open_inwoner/extended_sessions/tests/test_views.py
index add8d7a45d..081ee1fecb 100644
--- a/src/open_inwoner/extended_sessions/tests/test_views.py
+++ b/src/open_inwoner/extended_sessions/tests/test_views.py
@@ -1,4 +1,3 @@
-from django.test import TestCase
 from django.urls import reverse
 
 from django_webtest import WebTest
diff --git a/src/open_inwoner/haalcentraal/apps.py b/src/open_inwoner/haalcentraal/apps.py
index 880babdb24..b9ffe635a5 100644
--- a/src/open_inwoner/haalcentraal/apps.py
+++ b/src/open_inwoner/haalcentraal/apps.py
@@ -1,9 +1,8 @@
 from django.apps import AppConfig
-from django.utils.translation import ugettext_lazy as _
 
 
 class HaalCentraalConfig(AppConfig):
     name = "open_inwoner.haalcentraal"
 
     def ready(self):
-        from .signals import on_bsn_change
+        from .signals import on_bsn_change  # noqa
diff --git a/src/open_inwoner/haalcentraal/tests/test_signal.py b/src/open_inwoner/haalcentraal/tests/test_signal.py
index 2a0325019b..d37f0c9226 100644
--- a/src/open_inwoner/haalcentraal/tests/test_signal.py
+++ b/src/open_inwoner/haalcentraal/tests/test_signal.py
@@ -1,5 +1,4 @@
 import logging
-from datetime import date
 
 from django.test import TestCase, override_settings
 from django.utils.translation import gettext as _
diff --git a/src/open_inwoner/kvk/apps.py b/src/open_inwoner/kvk/apps.py
index 577a849152..ec8eb9fb04 100644
--- a/src/open_inwoner/kvk/apps.py
+++ b/src/open_inwoner/kvk/apps.py
@@ -1,9 +1,8 @@
 from django.apps import AppConfig
-from django.utils.translation import ugettext_lazy as _
 
 
 class KvKConfig(AppConfig):
     name = "open_inwoner.kvk"
 
     def ready(self):
-        from .signals import on_kvk_change
+        from .signals import on_kvk_change  # noqa
diff --git a/src/open_inwoner/openklant/tests/test_contactform.py b/src/open_inwoner/openklant/tests/test_contactform.py
index fdde508708..a1a20e64db 100644
--- a/src/open_inwoner/openklant/tests/test_contactform.py
+++ b/src/open_inwoner/openklant/tests/test_contactform.py
@@ -268,7 +268,7 @@ def test_submit_and_register_anon_via_api_with_klant(self, m):
             {
                 "medewerkerIdentificatie": {"identificatie": "FooVonBar"},
                 "bronorganisatie": "123456789",
-                "tekst": f"Onderwerp: Aanvraag document\n\nhey!\n\nwaddup?",
+                "tekst": "Onderwerp: Aanvraag document\n\nhey!\n\nwaddup?",
                 "type": "Melding",
                 "kanaal": "Internet",
                 "onderwerp": "afdeling-xyz",
@@ -413,7 +413,7 @@ def test_submit_and_register_bsn_user_via_api(self, m):
             {
                 "medewerkerIdentificatie": {"identificatie": "FooVonBar"},
                 "bronorganisatie": "123456789",
-                "tekst": f"Onderwerp: Aanvraag document\n\nhey!\n\nwaddup?",
+                "tekst": "Onderwerp: Aanvraag document\n\nhey!\n\nwaddup?",
                 "type": "Melding",
                 "kanaal": "Internet",
                 "onderwerp": "afdeling-xyz",
@@ -503,7 +503,7 @@ def test_submit_and_register_kvk_or_rsin_user_via_api(self, _m):
                         {
                             "medewerkerIdentificatie": {"identificatie": "FooVonBar"},
                             "bronorganisatie": "123456789",
-                            "tekst": f"Onderwerp: Aanvraag document\n\nhey!\n\nwaddup?",
+                            "tekst": "Onderwerp: Aanvraag document\n\nhey!\n\nwaddup?",
                             "type": "Melding",
                             "kanaal": "Internet",
                             "onderwerp": "afdeling-xyz",
@@ -579,7 +579,7 @@ def test_submit_and_register_bsn_user_via_api_and_update_klant(self, m):
             {
                 "medewerkerIdentificatie": {"identificatie": "FooVonBar"},
                 "bronorganisatie": "123456789",
-                "tekst": f"Onderwerp: Aanvraag document\n\nhey!\n\nwaddup?",
+                "tekst": "Onderwerp: Aanvraag document\n\nhey!\n\nwaddup?",
                 "type": "Melding",
                 "kanaal": "Internet",
                 "onderwerp": "afdeling-xyz",
@@ -675,7 +675,7 @@ def test_submit_and_register_kvk_or_rsin_user_via_api_and_update_klant(self, _m)
                         {
                             "medewerkerIdentificatie": {"identificatie": "FooVonBar"},
                             "bronorganisatie": "123456789",
-                            "tekst": f"Onderwerp: Aanvraag document\n\nhey!\n\nwaddup?",
+                            "tekst": "Onderwerp: Aanvraag document\n\nhey!\n\nwaddup?",
                             "type": "Melding",
                             "kanaal": "Internet",
                             "onderwerp": "afdeling-xyz",
diff --git a/src/open_inwoner/openklant/tests/test_signal.py b/src/open_inwoner/openklant/tests/test_signal.py
index c4961f0555..786e693cdb 100644
--- a/src/open_inwoner/openklant/tests/test_signal.py
+++ b/src/open_inwoner/openklant/tests/test_signal.py
@@ -1,5 +1,5 @@
 from django.contrib.auth import user_logged_in
-from django.test import RequestFactory, override_settings
+from django.test import RequestFactory
 
 import requests_mock
 from django_webtest import WebTest
diff --git a/src/open_inwoner/openzaak/clients.py b/src/open_inwoner/openzaak/clients.py
index 23dee2160c..7f17c6b173 100644
--- a/src/open_inwoner/openzaak/clients.py
+++ b/src/open_inwoner/openzaak/clients.py
@@ -16,7 +16,6 @@
 from zgw_consumers.service import pagination_helper
 
 from open_inwoner.openzaak.api_models import InformatieObject
-from open_inwoner.openzaak.models import OpenZaakConfig
 from open_inwoner.utils.api import ClientError, get_json_response
 
 from ..utils.decorators import cache as cache_result
diff --git a/src/open_inwoner/openzaak/documents.py b/src/open_inwoner/openzaak/documents.py
index 74410b9ae7..ddf7dda690 100644
--- a/src/open_inwoner/openzaak/documents.py
+++ b/src/open_inwoner/openzaak/documents.py
@@ -3,8 +3,6 @@
 
 from django.conf import settings
 
-from zgw_consumers.client import build_client
-
 from open_inwoner.openzaak.api_models import InformatieObject
 from open_inwoner.openzaak.clients import build_client
 
diff --git a/src/open_inwoner/openzaak/management/commands/zgw_dev_status.py b/src/open_inwoner/openzaak/management/commands/zgw_dev_status.py
index 5e3824d56d..ce2b2dd81b 100644
--- a/src/open_inwoner/openzaak/management/commands/zgw_dev_status.py
+++ b/src/open_inwoner/openzaak/management/commands/zgw_dev_status.py
@@ -172,7 +172,7 @@ def handle(self, *args, **options):
                     {
                         "zaak": case.url,
                         "resultaattype": next_result_type.url,
-                        "toelichting": f"set from management command",
+                        "toelichting": "set from management command",
                     },
                 )
 
@@ -182,7 +182,7 @@ def handle(self, *args, **options):
                     "zaak": case.url,
                     "statustype": next_status_type.url,
                     "datumStatusGezet": timezone.now().isoformat(),
-                    "statustoelichting": f"set from management command",
+                    "statustoelichting": "set from management command",
                 },
             )
 
diff --git a/src/open_inwoner/openzaak/models.py b/src/open_inwoner/openzaak/models.py
index e27bd775f0..f2c971d4cb 100644
--- a/src/open_inwoner/openzaak/models.py
+++ b/src/open_inwoner/openzaak/models.py
@@ -289,7 +289,7 @@ def __str__(self):
             self.identificatie,
             self.omschrijving,
         )
-        return f" - ".join(b for b in bits if b)
+        return " - ".join(b for b in bits if b)
 
 
 class ZaakTypeInformatieObjectTypeConfig(models.Model):
diff --git a/src/open_inwoner/openzaak/tests/test_documents.py b/src/open_inwoner/openzaak/tests/test_documents.py
index a2e5a24fc9..98c0838472 100644
--- a/src/open_inwoner/openzaak/tests/test_documents.py
+++ b/src/open_inwoner/openzaak/tests/test_documents.py
@@ -213,7 +213,7 @@ def test_document_content_is_retrieved_when_user_logged_in_via_digid(self, m):
         self.assertIn("Content-Disposition", response.headers)
         self.assertEqual(
             response.headers["Content-Disposition"],
-            f'attachment; filename="my_document.txt"',
+            'attachment; filename="my_document.txt"',
         )
         self.assertIn("Content-Type", response.headers)
         self.assertEqual(response.headers["Content-Type"], "text/plain")
diff --git a/src/open_inwoner/openzaak/tests/test_notification_data.py b/src/open_inwoner/openzaak/tests/test_notification_data.py
index d41454a5f3..80fcef5c7c 100644
--- a/src/open_inwoner/openzaak/tests/test_notification_data.py
+++ b/src/open_inwoner/openzaak/tests/test_notification_data.py
@@ -11,12 +11,7 @@
     DigidUserFactory,
     eHerkenningUserFactory,
 )
-from open_inwoner.openzaak.tests.factories import (
-    NotificationFactory,
-    ServiceFactory,
-    ZaakTypeConfigFactory,
-    ZaakTypeInformatieObjectTypeConfigFactory,
-)
+from open_inwoner.openzaak.tests.factories import NotificationFactory, ServiceFactory
 from open_inwoner.utils.test import paginated_response
 
 from ..models import OpenZaakConfig
diff --git a/src/open_inwoner/openzaak/tests/test_notification_zaak_infoobject.py b/src/open_inwoner/openzaak/tests/test_notification_zaak_infoobject.py
index 7166e6dbe1..32b282c32a 100644
--- a/src/open_inwoner/openzaak/tests/test_notification_zaak_infoobject.py
+++ b/src/open_inwoner/openzaak/tests/test_notification_zaak_infoobject.py
@@ -22,11 +22,7 @@
 from open_inwoner.utils.tests.helpers import AssertTimelineLogMixin, Lookups
 
 from ..api_models import InformatieObject, Zaak, ZaakInformatieObject, ZaakType
-from ..models import (
-    OpenZaakConfig,
-    UserCaseInfoObjectNotification,
-    ZaakTypeInformatieObjectTypeConfig,
-)
+from ..models import OpenZaakConfig, UserCaseInfoObjectNotification
 from .helpers import copy_with_new_uuid
 from .test_notification_data import MockAPIData
 
@@ -173,7 +169,7 @@ def test_zio_bails_when_cannot_fetch_case(self, m, mock_handle: Mock):
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored zaakinformatieobject notification: cannot retrieve case https://",
+            "ignored zaakinformatieobject notification: cannot retrieve case https://",
             lookup=Lookups.startswith,
             level=logging.ERROR,
         )
@@ -186,7 +182,7 @@ def test_zio_bails_when_cannot_fetch_case_type(self, m, mock_handle: Mock):
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored zaakinformatieobject notification: cannot retrieve case_type https://",
+            "ignored zaakinformatieobject notification: cannot retrieve case_type https://",
             lookup=Lookups.startswith,
             level=logging.ERROR,
         )
@@ -202,7 +198,7 @@ def test_zio_bails_when_case_not_visible_because_confidentiality(
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored zaakinformatieobject notification: case not visible after applying website visibility filter for case https://",
+            "ignored zaakinformatieobject notification: case not visible after applying website visibility filter for case https://",
             lookup=Lookups.startswith,
             level=logging.INFO,
         )
@@ -218,7 +214,7 @@ def test_zio_bails_when_case_not_visible_because_internal_case(
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored zaakinformatieobject notification: case not visible after applying website visibility filter for case https://",
+            "ignored zaakinformatieobject notification: case not visible after applying website visibility filter for case https://",
             lookup=Lookups.startswith,
             level=logging.INFO,
         )
@@ -267,7 +263,7 @@ def test_zio_bails_when_info_object_not_visible_because_confidentiality(
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored zaakinformatieobject notification: informatieobject not visible after applying website visibility filter for case https://",
+            "ignored zaakinformatieobject notification: informatieobject not visible after applying website visibility filter for case https://",
             lookup=Lookups.startswith,
             level=logging.INFO,
         )
@@ -283,7 +279,7 @@ def test_zio_bails_when_info_object_not_visible_because_not_definitive(
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored zaakinformatieobject notification: informatieobject not visible after applying website visibility filter for case https://",
+            "ignored zaakinformatieobject notification: informatieobject not visible after applying website visibility filter for case https://",
             lookup=Lookups.startswith,
             level=logging.INFO,
         )
diff --git a/src/open_inwoner/openzaak/tests/test_notification_zaak_status.py b/src/open_inwoner/openzaak/tests/test_notification_zaak_status.py
index 4f174a189c..e5239d3856 100644
--- a/src/open_inwoner/openzaak/tests/test_notification_zaak_status.py
+++ b/src/open_inwoner/openzaak/tests/test_notification_zaak_status.py
@@ -142,7 +142,7 @@ def test_status_bails_when_cannot_fetch_case(self, m, mock_handle: Mock):
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored status notification: cannot retrieve case https://",
+            "ignored status notification: cannot retrieve case https://",
             lookup=Lookups.startswith,
             level=logging.ERROR,
         )
@@ -155,7 +155,7 @@ def test_status_bails_when_cannot_fetch_case_type(self, m, mock_handle: Mock):
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored status notification: cannot retrieve case_type https://",
+            "ignored status notification: cannot retrieve case_type https://",
             lookup=Lookups.startswith,
             level=logging.ERROR,
         )
@@ -171,7 +171,7 @@ def test_status_bails_when_case_not_visible_because_confidentiality(
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored status notification: case not visible after applying website visibility filter for case https://",
+            "ignored status notification: case not visible after applying website visibility filter for case https://",
             lookup=Lookups.startswith,
             level=logging.INFO,
         )
@@ -187,7 +187,7 @@ def test_status_bails_when_case_not_visible_because_internal_case(
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored status notification: case not visible after applying website visibility filter for case https://",
+            "ignored status notification: case not visible after applying website visibility filter for case https://",
             lookup=Lookups.startswith,
             level=logging.INFO,
         )
@@ -204,7 +204,7 @@ def test_status_bails_when_cannot_fetch_status_history(self, m, mock_handle: Moc
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored status notification: cannot retrieve status_history for case https://",
+            "ignored status notification: cannot retrieve status_history for case https://",
             lookup=Lookups.startswith,
             level=logging.ERROR,
         )
@@ -220,7 +220,7 @@ def test_status_bails_when_status_history_is_single_initial_item(
 
         mock_handle.assert_not_called()
         self.assertTimelineLog(
-            f"ignored status notification: skip initial status notification for case https://",
+            "ignored status notification: skip initial status notification for case https://",
             lookup=Lookups.startswith,
             level=logging.INFO,
         )
diff --git a/src/open_inwoner/openzaak/tests/test_utils.py b/src/open_inwoner/openzaak/tests/test_utils.py
index fc4e6c4901..d04ea8968b 100644
--- a/src/open_inwoner/openzaak/tests/test_utils.py
+++ b/src/open_inwoner/openzaak/tests/test_utils.py
@@ -80,7 +80,7 @@ def test_is_info_object_visible(self):
                 )
 
         # test we don't leak on bad input
-        with self.subTest(f"bad vertrouwelijkheidaanduiding in info object"):
+        with self.subTest("bad vertrouwelijkheidaanduiding in info object"):
             info_object = factory(
                 InformatieObject,
                 generate_oas_component(
@@ -92,7 +92,7 @@ def test_is_info_object_visible(self):
             )
             self.assertFalse(is_info_object_visible(info_object, max_level))
 
-        with self.subTest(f"bad vertrouwelijkheidaanduiding as parameter"):
+        with self.subTest("bad vertrouwelijkheidaanduiding as parameter"):
             info_object = factory(
                 InformatieObject,
                 generate_oas_component(
diff --git a/src/open_inwoner/openzaak/tests/test_zgw_imports.py b/src/open_inwoner/openzaak/tests/test_zgw_imports.py
index cc6bc974f2..e3e5edd2f9 100644
--- a/src/open_inwoner/openzaak/tests/test_zgw_imports.py
+++ b/src/open_inwoner/openzaak/tests/test_zgw_imports.py
@@ -2,7 +2,6 @@
 
 import requests_mock
 from zgw_consumers.constants import APITypes
-from zgw_consumers.test import generate_oas_component
 
 from open_inwoner.openzaak.models import CatalogusConfig, OpenZaakConfig, ZaakTypeConfig
 from open_inwoner.openzaak.tests.factories import CatalogusConfigFactory, ServiceFactory
diff --git a/src/open_inwoner/openzaak/utils.py b/src/open_inwoner/openzaak/utils.py
index ea372b4bd7..97fc8a64ac 100644
--- a/src/open_inwoner/openzaak/utils.py
+++ b/src/open_inwoner/openzaak/utils.py
@@ -1,6 +1,5 @@
 import logging
-from typing import Optional, Union
-from uuid import UUID
+from typing import Optional
 
 from zgw_consumers.api_models.constants import RolTypes, VertrouwelijkheidsAanduidingen
 
diff --git a/src/open_inwoner/pdc/admin/__init__.py b/src/open_inwoner/pdc/admin/__init__.py
index bfb2f975f6..3822e81e5a 100644
--- a/src/open_inwoner/pdc/admin/__init__.py
+++ b/src/open_inwoner/pdc/admin/__init__.py
@@ -1,6 +1,6 @@
-from .category import *
-from .faq import *
-from .neighbourhood import *
-from .organization import *
-from .product import *
-from .tag import *
+from .category import *  # noqa
+from .faq import *  # noqa
+from .neighbourhood import *  # noqa
+from .organization import *  # noqa
+from .product import *  # noqa
+from .tag import *  # noqa
diff --git a/src/open_inwoner/pdc/admin/category.py b/src/open_inwoner/pdc/admin/category.py
index 58b7aba6a5..bfd7dd5728 100644
--- a/src/open_inwoner/pdc/admin/category.py
+++ b/src/open_inwoner/pdc/admin/category.py
@@ -2,7 +2,6 @@
 
 from django import forms
 from django.contrib import admin
-from django.core.exceptions import ValidationError
 from django.forms import BaseModelFormSet
 from django.utils.translation import gettext as _
 
diff --git a/src/open_inwoner/pdc/managers.py b/src/open_inwoner/pdc/managers.py
index c0e38b57a9..918b438933 100644
--- a/src/open_inwoner/pdc/managers.py
+++ b/src/open_inwoner/pdc/managers.py
@@ -114,7 +114,7 @@ def filter_by_zaken(self, cases: List[Zaak]):
         pks = []
         for category in qs:
             for identificatie in category.zaaktypen:
-                if not identificatie in months_since_last_zaak_per_zaaktype:
+                if identificatie not in months_since_last_zaak_per_zaaktype:
                     continue
                 relevante_zaakperiode = zaakperiode_mapping.get(identificatie)
                 if not relevante_zaakperiode:
diff --git a/src/open_inwoner/pdc/models/__init__.py b/src/open_inwoner/pdc/models/__init__.py
index bfb2f975f6..1466581d0d 100644
--- a/src/open_inwoner/pdc/models/__init__.py
+++ b/src/open_inwoner/pdc/models/__init__.py
@@ -1,6 +1,31 @@
-from .category import *
-from .faq import *
-from .neighbourhood import *
-from .organization import *
-from .product import *
-from .tag import *
+from .category import Category
+from .faq import Question
+from .neighbourhood import Neighbourhood
+from .organization import Organization, OrganizationType
+from .product import (
+    CategoryProduct,
+    Product,
+    ProductCondition,
+    ProductContact,
+    ProductFile,
+    ProductLink,
+    ProductLocation,
+)
+from .tag import Tag, TagType
+
+__all__ = [
+    "Category",
+    "Question",
+    "Neighbourhood",
+    "Organization",
+    "OrganizationType",
+    "CategoryProduct",
+    "Product",
+    "ProductCondition",
+    "ProductContact",
+    "ProductFile",
+    "ProductLink",
+    "ProductLocation",
+    "Tag",
+    "TagType",
+]
diff --git a/src/open_inwoner/pdc/models/category.py b/src/open_inwoner/pdc/models/category.py
index 2ff8a732f4..a9783500c6 100644
--- a/src/open_inwoner/pdc/models/category.py
+++ b/src/open_inwoner/pdc/models/category.py
@@ -7,7 +7,6 @@
 from treebeard.exceptions import InvalidMoveToDescendant
 from treebeard.mp_tree import MP_MoveHandler, MP_Node
 
-from ...utils.ckeditor import get_rendered_content
 from ..managers import CategoryPublishedQueryset
 
 
diff --git a/src/open_inwoner/pdc/models/product.py b/src/open_inwoner/pdc/models/product.py
index 6c511c9069..4816fafca7 100644
--- a/src/open_inwoner/pdc/models/product.py
+++ b/src/open_inwoner/pdc/models/product.py
@@ -1,4 +1,3 @@
-import html
 import json
 from typing import Union
 from uuid import uuid4
@@ -6,7 +5,6 @@
 from django.contrib.postgres.fields import ArrayField
 from django.db import models
 from django.urls import reverse
-from django.utils.html import strip_tags
 from django.utils.translation import ugettext_lazy as _
 
 from filer.fields.file import FilerFileField
@@ -232,7 +230,7 @@ def get_absolute_url(self, category=None):
         )
 
     def has_cta_tag(self):
-        return "\[CTABUTTON\]" in self.content
+        return "\[CTABUTTON\]" in self.content  # noqa
 
 
 class ProductFile(models.Model):
diff --git a/src/open_inwoner/pdc/resources/__init__.py b/src/open_inwoner/pdc/resources/__init__.py
index 7a2de252d9..79f5621f92 100644
--- a/src/open_inwoner/pdc/resources/__init__.py
+++ b/src/open_inwoner/pdc/resources/__init__.py
@@ -1,2 +1,9 @@
 from .export_resource import CategoryExportResource, ProductExportResource
 from .import_resource import CategoryImportResource, ProductImportResource
+
+__all__ = [
+    "CategoryExportResource",
+    "ProductExportResource",
+    "CategoryImportResource",
+    "ProductImportResource",
+]
diff --git a/src/open_inwoner/pdc/tests/test_product.py b/src/open_inwoner/pdc/tests/test_product.py
index f737f532e4..bf438f54be 100644
--- a/src/open_inwoner/pdc/tests/test_product.py
+++ b/src/open_inwoner/pdc/tests/test_product.py
@@ -268,7 +268,7 @@ def test_button_text_change(self):
 
     def test_sidemenu_button_is_not_rendered_when_cta_inside_product_content(self):
         product = ProductFactory(
-            content="Some content \[CTABUTTON\]", link="http://www.example.com"
+            content="Some content \[CTABUTTON\]", link="http://www.example.com"  # noqa
         )
 
         response = self.app.get(
diff --git a/src/open_inwoner/pdc/tests/test_product_resources.py b/src/open_inwoner/pdc/tests/test_product_resources.py
index 9feb6ab70d..80eb5720f2 100644
--- a/src/open_inwoner/pdc/tests/test_product_resources.py
+++ b/src/open_inwoner/pdc/tests/test_product_resources.py
@@ -1,5 +1,4 @@
 from collections import OrderedDict
-from decimal import Decimal
 
 from django.core.exceptions import ValidationError
 from django.test import TestCase
diff --git a/src/open_inwoner/pdc/tests/test_views.py b/src/open_inwoner/pdc/tests/test_views.py
index 0f81281923..00cc0b7c2e 100644
--- a/src/open_inwoner/pdc/tests/test_views.py
+++ b/src/open_inwoner/pdc/tests/test_views.py
@@ -1,5 +1,3 @@
-from unittest import skip
-
 from django.conf import settings
 from django.test import TestCase, override_settings
 from django.urls import reverse
diff --git a/src/open_inwoner/plans/tests/test_views.py b/src/open_inwoner/plans/tests/test_views.py
index bb05b08f95..0049b92067 100644
--- a/src/open_inwoner/plans/tests/test_views.py
+++ b/src/open_inwoner/plans/tests/test_views.py
@@ -480,7 +480,7 @@ def test_plan_create_plan_validation_error_reselects_template_and_contact(self):
         self.assertEqual(elem.attrib.get("checked"), "checked")
 
         # NOTE: custom widget ID hardcoded on index of choice
-        elem = response.pyquery(f"#id_plan_contacts_1")[0]
+        elem = response.pyquery("#id_plan_contacts_1")[0]
         self.assertEqual(elem.attrib.get("checked"), "checked")
 
     def test_plan_create_contains_contact_create_link_when_no_contacts_exist(self):
diff --git a/src/open_inwoner/questionnaire/tests/test_views.py b/src/open_inwoner/questionnaire/tests/test_views.py
index 014b352d51..2b38f23879 100644
--- a/src/open_inwoner/questionnaire/tests/test_views.py
+++ b/src/open_inwoner/questionnaire/tests/test_views.py
@@ -6,7 +6,6 @@
 from django.urls import reverse
 from django.views.generic import FormView
 
-from cms import api
 from django_webtest import WebTest
 
 from ...accounts.tests.factories import UserFactory
diff --git a/src/open_inwoner/search/forms.py b/src/open_inwoner/search/forms.py
index 66130f01e1..d1b3b82ccb 100644
--- a/src/open_inwoner/search/forms.py
+++ b/src/open_inwoner/search/forms.py
@@ -1,10 +1,6 @@
 from django import forms
-from django.forms import widgets
-from django.forms.widgets import Textarea
 from django.utils.translation import ugettext_lazy as _
 
-from open_inwoner.components.templatetags.form_tags import form
-
 from .models import Feedback
 
 
diff --git a/src/open_inwoner/search/models.py b/src/open_inwoner/search/models.py
index 7f1d40fcc1..ee4e21ac20 100644
--- a/src/open_inwoner/search/models.py
+++ b/src/open_inwoner/search/models.py
@@ -4,7 +4,6 @@
 from django.utils.translation import ugettext_lazy as _
 
 from django_better_admin_arrayfield.models.fields import ArrayField
-from solo.models import SingletonModel
 
 from .query import FieldBoostQueryset
 
diff --git a/src/open_inwoner/search/resources/__init__.py b/src/open_inwoner/search/resources/__init__.py
index fab0f02169..f99689607a 100644
--- a/src/open_inwoner/search/resources/__init__.py
+++ b/src/open_inwoner/search/resources/__init__.py
@@ -1 +1,5 @@
 from .resources import SynonymResource
+
+__all__ = [
+    "SynonymResource",
+]
diff --git a/src/open_inwoner/search/results.py b/src/open_inwoner/search/results.py
index 523e384b99..647df553e9 100644
--- a/src/open_inwoner/search/results.py
+++ b/src/open_inwoner/search/results.py
@@ -52,7 +52,7 @@ def generate_buckets(self, init_buckets: list):
                     )
                 )
             else:
-                raise NotImplemented("Bucket shape is unknown")
+                raise NotImplementedError("Bucket shape is unknown")
 
         return buckets
 
diff --git a/src/open_inwoner/search/tests/test_feedback.py b/src/open_inwoner/search/tests/test_feedback.py
index 4629abedfd..d1b69e8d79 100644
--- a/src/open_inwoner/search/tests/test_feedback.py
+++ b/src/open_inwoner/search/tests/test_feedback.py
@@ -44,7 +44,7 @@ def test_positive_feedback_is_saved_with_authenticated_user_and_without_filters(
 
         feedback = Feedback.objects.get()
 
-        self.assertEqual(feedback.search_query, f"query: keyword1")
+        self.assertEqual(feedback.search_query, "query: keyword1")
         self.assertEqual(feedback.search_url, url)
         self.assertTrue(feedback.positive)
         self.assertEqual(feedback.remark, "Some remark")
@@ -65,7 +65,7 @@ def test_negative_feedback_is_saved_with_authenticated_user_and_without_filters(
 
         feedback = Feedback.objects.get()
 
-        self.assertEqual(feedback.search_query, f"query: keyword1")
+        self.assertEqual(feedback.search_query, "query: keyword1")
         self.assertEqual(feedback.search_url, url)
         self.assertFalse(feedback.positive)
         self.assertEqual(feedback.remark, "Some remark")
@@ -85,7 +85,7 @@ def test_positive_feedback_is_saved_with_unauthenticated_user_and_without_filter
 
         feedback = Feedback.objects.get()
 
-        self.assertEqual(feedback.search_query, f"query: keyword1")
+        self.assertEqual(feedback.search_query, "query: keyword1")
         self.assertEqual(feedback.search_url, url)
         self.assertTrue(feedback.positive)
         self.assertEqual(feedback.remark, "Some remark")
@@ -105,7 +105,7 @@ def test_negative_feedback_is_saved_with_unauthenticated_user_and_without_filter
 
         feedback = Feedback.objects.get()
 
-        self.assertEqual(feedback.search_query, f"query: keyword1")
+        self.assertEqual(feedback.search_query, "query: keyword1")
         self.assertEqual(feedback.search_url, url)
         self.assertFalse(feedback.positive)
         self.assertEqual(feedback.remark, "Some remark")
@@ -160,7 +160,7 @@ def test_positive_feedback_is_saved_with_unauthenticated_user_and_with_filters(
 
         feedback = Feedback.objects.get()
 
-        self.assertEqual(feedback.search_query, f"query: keyword1")
+        self.assertEqual(feedback.search_query, "query: keyword1")
         self.assertEqual(feedback.search_url, url)
         self.assertTrue(feedback.positive)
         self.assertEqual(feedback.remark, "Some remark")
diff --git a/src/open_inwoner/userfeed/apps.py b/src/open_inwoner/userfeed/apps.py
index e68053282f..1c6e6c163b 100644
--- a/src/open_inwoner/userfeed/apps.py
+++ b/src/open_inwoner/userfeed/apps.py
@@ -1,7 +1,3 @@
-import os
-from importlib import import_module
-from pathlib import Path
-
 from django.apps import AppConfig
 
 
diff --git a/src/open_inwoner/userfeed/hooks/__init__.py b/src/open_inwoner/userfeed/hooks/__init__.py
index 5ffb0d9fb4..6f35f072e5 100644
--- a/src/open_inwoner/userfeed/hooks/__init__.py
+++ b/src/open_inwoner/userfeed/hooks/__init__.py
@@ -10,3 +10,16 @@
 )
 from .common import simple_message
 from .plan import PlanExpiresFeedItem, plan_completed, plan_expiring
+
+__all__ = [
+    "CaseDocumentAddedFeedItem",
+    "case_document_added_notification_received",
+    "case_documents_seen",
+    "CaseStatusUpdateFeedItem",
+    "case_status_notification_received",
+    "case_status_seen",
+    "simple_message",
+    "PlanExpiresFeedItem",
+    "plan_completed",
+    "plan_expiring",
+]
diff --git a/src/open_inwoner/userfeed/tests/test_commands.py b/src/open_inwoner/userfeed/tests/test_commands.py
index 6314b6998e..ef6cdf57a1 100644
--- a/src/open_inwoner/userfeed/tests/test_commands.py
+++ b/src/open_inwoner/userfeed/tests/test_commands.py
@@ -1,5 +1,5 @@
 from datetime import datetime
-from unittest.mock import Mock, patch
+from unittest.mock import patch
 
 from django.core.management import call_command
 from django.test import TestCase
diff --git a/src/open_inwoner/userfeed/tests/test_feed.py b/src/open_inwoner/userfeed/tests/test_feed.py
index 4af98cfcf3..0d5d7bfdef 100644
--- a/src/open_inwoner/userfeed/tests/test_feed.py
+++ b/src/open_inwoner/userfeed/tests/test_feed.py
@@ -1,7 +1,7 @@
 from django.test import TestCase
 from django.utils import timezone
 from django.utils.html import strip_tags
-from django.utils.translation import ngettext, ugettext as _
+from django.utils.translation import ngettext
 
 from freezegun import freeze_time
 
diff --git a/src/open_inwoner/utils/apps.py b/src/open_inwoner/utils/apps.py
index c272b37a9c..dd49e28088 100644
--- a/src/open_inwoner/utils/apps.py
+++ b/src/open_inwoner/utils/apps.py
@@ -6,4 +6,4 @@ class UtilsConfig(AppConfig):
 
     def ready(self):
         from . import checks  # noqa
-        from .signals import copy_log_entry_to_timeline_logger
+        from .signals import copy_log_entry_to_timeline_logger  # noqa
diff --git a/src/open_inwoner/utils/tests/test_timeline_logger.py b/src/open_inwoner/utils/tests/test_timeline_logger.py
index 363cba0e14..837d262c12 100644
--- a/src/open_inwoner/utils/tests/test_timeline_logger.py
+++ b/src/open_inwoner/utils/tests/test_timeline_logger.py
@@ -72,7 +72,7 @@ def test_changed_object_is_logged(self):
             {
                 "message": "Titel, Doel and Einddatum gewijzigd.",
                 "action_flag": list(LOG_ACTIONS[CHANGE]),
-                "content_object_repr": f"Updated",
+                "content_object_repr": "Updated",
             },
         )
 
diff --git a/src/open_inwoner/utils/translate.py b/src/open_inwoner/utils/translate.py
index 5755ac07f5..526c5c5e5e 100644
--- a/src/open_inwoner/utils/translate.py
+++ b/src/open_inwoner/utils/translate.py
@@ -1,4 +1,4 @@
-from typing import Any, Iterable, Optional, Tuple
+from typing import Any, Iterable, Tuple
 
 from glom import glom
 
diff --git a/src/open_inwoner/wsgi.py b/src/open_inwoner/wsgi.py
index 8f5aafb7ed..3b583ce601 100644
--- a/src/open_inwoner/wsgi.py
+++ b/src/open_inwoner/wsgi.py
@@ -6,8 +6,6 @@
 For more information on this file, see
 https://docs.djangoproject.com/en/3.1/howto/deployment/wsgi/
 """
-import os
-
 from django.core.wsgi import get_wsgi_application
 
 from open_inwoner.setup import setup_env