diff --git a/src/backend/core/admin.py b/src/backend/core/admin.py
index 3d300b65..3f9f3eeb 100644
--- a/src/backend/core/admin.py
+++ b/src/backend/core/admin.py
@@ -1,4 +1,5 @@
 """Admin classes and registrations for core app."""
+
 from django.contrib import admin
 from django.contrib.auth import admin as auth_admin
 from django.utils.translation import gettext_lazy as _
diff --git a/src/backend/core/api/__init__.py b/src/backend/core/api/__init__.py
index e825f838..f37b3520 100644
--- a/src/backend/core/api/__init__.py
+++ b/src/backend/core/api/__init__.py
@@ -1,4 +1,5 @@
 """Meet core API endpoints"""
+
 from django.conf import settings
 from django.core.exceptions import ValidationError
 
@@ -22,6 +23,8 @@ def exception_handler(exc, context):
             detail = exc.message
         elif hasattr(exc, "messages"):
             detail = exc.messages
+        else:
+            detail = ""
 
         exc = drf_exceptions.ValidationError(detail=detail)
 
diff --git a/src/backend/core/api/permissions.py b/src/backend/core/api/permissions.py
index 805bc13e..7e6d4988 100644
--- a/src/backend/core/api/permissions.py
+++ b/src/backend/core/api/permissions.py
@@ -1,4 +1,5 @@
 """Permission handlers for the Meet core app."""
+
 from rest_framework import permissions
 
 from ..models import RoleChoices
diff --git a/src/backend/core/api/serializers.py b/src/backend/core/api/serializers.py
index 7b3f9c6f..394df68c 100644
--- a/src/backend/core/api/serializers.py
+++ b/src/backend/core/api/serializers.py
@@ -1,4 +1,5 @@
 """Client serializers for the Meet core app."""
+
 from django.conf import settings
 from django.utils.translation import gettext_lazy as _
 
diff --git a/src/backend/core/api/viewsets.py b/src/backend/core/api/viewsets.py
index 9cfd0add..af1cd818 100644
--- a/src/backend/core/api/viewsets.py
+++ b/src/backend/core/api/viewsets.py
@@ -1,4 +1,5 @@
 """API endpoints"""
+
 import uuid
 
 from django.conf import settings
diff --git a/src/backend/core/enums.py b/src/backend/core/enums.py
index f4e0e11a..e67d7b5b 100644
--- a/src/backend/core/enums.py
+++ b/src/backend/core/enums.py
@@ -1,6 +1,7 @@
 """
 Core application enums declaration
 """
+
 from django.conf import global_settings, settings
 from django.utils.translation import gettext_lazy as _
 
diff --git a/src/backend/core/factories.py b/src/backend/core/factories.py
index 38f91b81..7fe300e8 100644
--- a/src/backend/core/factories.py
+++ b/src/backend/core/factories.py
@@ -2,6 +2,7 @@
 """
 Core application factories
 """
+
 from django.conf import settings
 from django.contrib.auth.hashers import make_password
 from django.utils.text import slugify
diff --git a/src/backend/core/models.py b/src/backend/core/models.py
index 86110011..332af8f8 100644
--- a/src/backend/core/models.py
+++ b/src/backend/core/models.py
@@ -1,6 +1,7 @@
 """
 Declare and configure the models for the Meet core application
 """
+
 import uuid
 from logging import getLogger
 
diff --git a/src/backend/core/tests/authentication/test_backends.py b/src/backend/core/tests/authentication/test_backends.py
index f35d51c0..654401ba 100644
--- a/src/backend/core/tests/authentication/test_backends.py
+++ b/src/backend/core/tests/authentication/test_backends.py
@@ -92,9 +92,12 @@ def test_models_oidc_user_getter_invalid_token(django_assert_num_queries, monkey
 
     monkeypatch.setattr(OIDCAuthenticationBackend, "get_userinfo", get_userinfo_mocked)
 
-    with django_assert_num_queries(0), pytest.raises(
-        SuspiciousOperation,
-        match="User info contained no recognizable user identification",
+    with (
+        django_assert_num_queries(0),
+        pytest.raises(
+            SuspiciousOperation,
+            match="User info contained no recognizable user identification",
+        ),
     ):
         klass.get_or_create_user(access_token="test-token", id_token=None, payload=None)
 
diff --git a/src/backend/core/tests/conftest.py b/src/backend/core/tests/conftest.py
index c95c94fc..b8beeced 100644
--- a/src/backend/core/tests/conftest.py
+++ b/src/backend/core/tests/conftest.py
@@ -1,4 +1,5 @@
 """Fixtures for tests in the Meet core application"""
+
 from unittest import mock
 
 import pytest
diff --git a/src/backend/core/tests/rooms/test_api_rooms_create.py b/src/backend/core/tests/rooms/test_api_rooms_create.py
index c8b19161..89cc8e43 100644
--- a/src/backend/core/tests/rooms/test_api_rooms_create.py
+++ b/src/backend/core/tests/rooms/test_api_rooms_create.py
@@ -1,6 +1,7 @@
 """
 Test rooms API endpoints in the Meet core app: create.
 """
+
 import pytest
 from rest_framework.test import APIClient
 
diff --git a/src/backend/core/tests/rooms/test_api_rooms_delete.py b/src/backend/core/tests/rooms/test_api_rooms_delete.py
index 9924d824..a7bb53d5 100644
--- a/src/backend/core/tests/rooms/test_api_rooms_delete.py
+++ b/src/backend/core/tests/rooms/test_api_rooms_delete.py
@@ -1,6 +1,7 @@
 """
 Test rooms API endpoints in the Meet core app: delete.
 """
+
 import pytest
 from rest_framework.test import APIClient
 
diff --git a/src/backend/core/tests/rooms/test_api_rooms_list.py b/src/backend/core/tests/rooms/test_api_rooms_list.py
index 3777217b..29a84ddb 100644
--- a/src/backend/core/tests/rooms/test_api_rooms_list.py
+++ b/src/backend/core/tests/rooms/test_api_rooms_list.py
@@ -1,6 +1,7 @@
 """
 Test rooms API endpoints in the Meet core app: list.
 """
+
 from unittest import mock
 
 import pytest
diff --git a/src/backend/core/tests/rooms/test_api_rooms_retrieve.py b/src/backend/core/tests/rooms/test_api_rooms_retrieve.py
index da287670..ffa17eaa 100644
--- a/src/backend/core/tests/rooms/test_api_rooms_retrieve.py
+++ b/src/backend/core/tests/rooms/test_api_rooms_retrieve.py
@@ -1,6 +1,7 @@
 """
 Test rooms API endpoints in the Meet core app: retrieve.
 """
+
 import random
 from unittest import mock
 
diff --git a/src/backend/core/tests/rooms/test_api_rooms_update.py b/src/backend/core/tests/rooms/test_api_rooms_update.py
index cfd4f69c..fb682781 100644
--- a/src/backend/core/tests/rooms/test_api_rooms_update.py
+++ b/src/backend/core/tests/rooms/test_api_rooms_update.py
@@ -1,6 +1,7 @@
 """
 Test rooms API endpoints in the Meet core app: update.
 """
+
 import random
 
 import pytest
diff --git a/src/backend/core/tests/swagger/test_openapi_schema.py b/src/backend/core/tests/swagger/test_openapi_schema.py
index 26b58b71..9e0919a8 100644
--- a/src/backend/core/tests/swagger/test_openapi_schema.py
+++ b/src/backend/core/tests/swagger/test_openapi_schema.py
@@ -1,6 +1,7 @@
 """
 Test suite for generated openapi schema.
 """
+
 import json
 from io import StringIO
 
diff --git a/src/backend/core/tests/test_api_resource_accesses.py b/src/backend/core/tests/test_api_resource_accesses.py
index 522fe42b..3d7b0ec2 100644
--- a/src/backend/core/tests/test_api_resource_accesses.py
+++ b/src/backend/core/tests/test_api_resource_accesses.py
@@ -1,6 +1,7 @@
 """
 Test resource accesses API endpoints in the Meet core app.
 """
+
 import random
 from unittest import mock
 from uuid import uuid4
diff --git a/src/backend/core/tests/test_api_users.py b/src/backend/core/tests/test_api_users.py
index 2061db70..da2c12a6 100644
--- a/src/backend/core/tests/test_api_users.py
+++ b/src/backend/core/tests/test_api_users.py
@@ -1,6 +1,7 @@
 """
 Test users API endpoints in the Meet core app.
 """
+
 import pytest
 from rest_framework.test import APIClient
 
diff --git a/src/backend/core/tests/test_models_resource_accesses.py b/src/backend/core/tests/test_models_resource_accesses.py
index ffcf85c8..878b0f96 100644
--- a/src/backend/core/tests/test_models_resource_accesses.py
+++ b/src/backend/core/tests/test_models_resource_accesses.py
@@ -1,6 +1,7 @@
 """
 Unit tests for the ResourceAccess model with user
 """
+
 from django.core.exceptions import ValidationError
 
 import pytest
diff --git a/src/backend/core/tests/test_models_rooms.py b/src/backend/core/tests/test_models_rooms.py
index 8c757a85..8879bfca 100644
--- a/src/backend/core/tests/test_models_rooms.py
+++ b/src/backend/core/tests/test_models_rooms.py
@@ -1,6 +1,7 @@
 """
 Unit tests for the Room model
 """
+
 from django.contrib.auth.models import AnonymousUser
 from django.core.exceptions import ValidationError
 
diff --git a/src/backend/core/tests/test_models_users.py b/src/backend/core/tests/test_models_users.py
index f3e808c4..edea5bb9 100644
--- a/src/backend/core/tests/test_models_users.py
+++ b/src/backend/core/tests/test_models_users.py
@@ -1,6 +1,7 @@
 """
 Unit tests for the User model
 """
+
 from unittest import mock
 
 from django.core.exceptions import ValidationError
diff --git a/src/backend/core/urls.py b/src/backend/core/urls.py
index 51e360c1..f1683a38 100644
--- a/src/backend/core/urls.py
+++ b/src/backend/core/urls.py
@@ -1,4 +1,5 @@
 """URL configuration for the core app."""
+
 from django.conf import settings
 from django.urls import include, path
 
diff --git a/src/backend/core/utils.py b/src/backend/core/utils.py
index 65118b52..7ab114ca 100644
--- a/src/backend/core/utils.py
+++ b/src/backend/core/utils.py
@@ -1,6 +1,7 @@
 """
 Utils functions used in the core app
 """
+
 from typing import Optional
 from uuid import uuid4
 
diff --git a/src/backend/demo/management/commands/createsuperuser.py b/src/backend/demo/management/commands/createsuperuser.py
index 6ac7cf5e..9c5ab786 100644
--- a/src/backend/demo/management/commands/createsuperuser.py
+++ b/src/backend/demo/management/commands/createsuperuser.py
@@ -1,4 +1,5 @@
 """Management user to create a superuser."""
+
 from django.contrib.auth import get_user_model
 from django.core.management.base import BaseCommand
 
diff --git a/src/backend/manage.py b/src/backend/manage.py
index e1e11f02..4e53fdca 100644
--- a/src/backend/manage.py
+++ b/src/backend/manage.py
@@ -2,6 +2,7 @@
 """
 meet's sandbox management script.
 """
+
 import os
 import sys
 
diff --git a/src/backend/meet/celery_app.py b/src/backend/meet/celery_app.py
index 925c0d11..1fd3b697 100644
--- a/src/backend/meet/celery_app.py
+++ b/src/backend/meet/celery_app.py
@@ -1,4 +1,5 @@
 """Meet celery configuration file."""
+
 import os
 
 from celery import Celery
diff --git a/src/backend/meet/settings.py b/src/backend/meet/settings.py
index 65b6a587..033af803 100755
--- a/src/backend/meet/settings.py
+++ b/src/backend/meet/settings.py
@@ -9,6 +9,7 @@ https://docs.djangoproject.com/en/3.1/topics/settings/
 For the full list of settings and their values, see
 https://docs.djangoproject.com/en/3.1/ref/settings/
 """
+
 import json
 import os