From 6d01cffbc0f7a15728a4b1a8d883111b35ca88be Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9my=20Hubscher?= <remy@yampa.ai>
Date: Tue, 7 Oct 2025 11:25:07 +0200
Subject: [PATCH] Use double quotes

---
 constance/admin.py                            |  84 ++++----
 constance/apps.py                             |   8 +-
 constance/backends/database.py                |  10 +-
 constance/backends/redisd.py                  |   4 +-
 constance/base.py                             |   2 +-
 constance/checks.py                           |  22 +-
 constance/codecs.py                           |  44 ++--
 constance/context_processors.py               |   2 +-
 constance/forms.py                            |  64 +++---
 constance/management/commands/constance.py    |  44 ++--
 constance/migrations/0001_initial.py          |  14 +-
 .../migrations/0002_migrate_from_old_table.py |  14 +-
 constance/migrations/0003_drop_pickle.py      |  16 +-
 constance/models.py                           |   8 +-
 constance/settings.py                         |  28 +--
 constance/test/__init__.py                    |   2 +-
 constance/test/pytest.py                      |   8 +-
 constance/test/unittest.py                    |   4 +-
 constance/utils.py                            |   4 +-
 docs/conf.py                                  |  64 +++---
 docs/extensions/settings.py                   |   6 +-
 .../apps/catalog/migrations/0001_initial.py   |   6 +-
 .../apps/storage/migrations/0001_initial.py   |  16 +-
 example/cheeseshop/apps/storage/models.py     |   4 +-
 example/cheeseshop/fields.py                  |   2 +-
 example/cheeseshop/settings.py                | 148 +++++++-------
 example/cheeseshop/urls.py                    |   2 +-
 example/cheeseshop/wsgi.py                    |   2 +-
 example/manage.py                             |   4 +-
 pyproject.toml                                |   1 -
 tests/backends/test_database.py               |   2 +-
 tests/backends/test_memory.py                 |   2 +-
 tests/backends/test_redis.py                  |   4 +-
 tests/settings.py                             | 134 ++++++------
 tests/storage.py                              |  58 +++---
 tests/test_admin.py                           | 190 +++++++++---------
 tests/test_checks.py                          |  12 +-
 tests/test_cli.py                             |  56 +++---
 tests/test_codecs.py                          |  40 ++--
 tests/test_form.py                            |  22 +-
 tests/test_pytest_overrides.py                |   6 +-
 tests/test_utils.py                           |  76 +++----
 tests/urls.py                                 |   2 +-
 43 files changed, 620 insertions(+), 621 deletions(-)

diff --git a/constance/admin.py b/constance/admin.py
index 862759a..43715f0 100644
--- a/constance/admin.py
+++ b/constance/admin.py
@@ -25,7 +25,7 @@ config = LazyConfig()
 
 
 class ConstanceAdmin(admin.ModelAdmin):
-    change_list_template = 'admin/constance/change_list.html'
+    change_list_template = "admin/constance/change_list.html"
     change_list_form = ConstanceForm
 
     def __init__(self, model, admin_site):
@@ -33,10 +33,10 @@ class ConstanceAdmin(admin.ModelAdmin):
         super().__init__(model, admin_site)
 
     def get_urls(self):
-        info = f'{self.model._meta.app_label}_{self.model._meta.module_name}'
+        info = f"{self.model._meta.app_label}_{self.model._meta.module_name}"
         return [
-            path('', self.admin_site.admin_view(self.changelist_view), name=f'{info}_changelist'),
-            path('', self.admin_site.admin_view(self.changelist_view), name=f'{info}_add'),
+            path("", self.admin_site.admin_view(self.changelist_view), name=f"{info}_changelist"),
+            path("", self.admin_site.admin_view(self.changelist_view), name=f"{info}_add"),
         ]
 
     def get_config_value(self, name, options, form, initial):
@@ -52,23 +52,23 @@ class ConstanceAdmin(admin.ModelAdmin):
 
         form_field = form[name]
         config_value = {
-            'name': name,
-            'default': localize(default),
-            'raw_default': default,
-            'help_text': _(help_text),
-            'value': localize(value),
-            'modified': localize(value) != localize(default),
-            'form_field': form_field,
-            'is_date': isinstance(default, date),
-            'is_datetime': isinstance(default, datetime),
-            'is_checkbox': isinstance(form_field.field.widget, forms.CheckboxInput),
-            'is_file': isinstance(form_field.field.widget, forms.FileInput),
+            "name": name,
+            "default": localize(default),
+            "raw_default": default,
+            "help_text": _(help_text),
+            "value": localize(value),
+            "modified": localize(value) != localize(default),
+            "form_field": form_field,
+            "is_date": isinstance(default, date),
+            "is_datetime": isinstance(default, datetime),
+            "is_checkbox": isinstance(form_field.field.widget, forms.CheckboxInput),
+            "is_file": isinstance(form_field.field.widget, forms.FileInput),
         }
         if field_type and field_type in settings.ADDITIONAL_FIELDS:
             serialized_default = form[name].field.prepare_value(default)
-            config_value['default'] = serialized_default
-            config_value['raw_default'] = serialized_default
-            config_value['value'] = form[name].field.prepare_value(value)
+            config_value["default"] = serialized_default
+            config_value["raw_default"] = serialized_default
+            config_value["value"] = form[name].field.prepare_value(value)
 
         return config_value
 
@@ -85,26 +85,26 @@ class ConstanceAdmin(admin.ModelAdmin):
         initial = get_values()
         form_cls = self.get_changelist_form(request)
         form = form_cls(initial=initial, request=request)
-        if request.method == 'POST' and request.user.has_perm('constance.change_config'):
+        if request.method == "POST" and request.user.has_perm("constance.change_config"):
             form = form_cls(data=request.POST, files=request.FILES, initial=initial, request=request)
             if form.is_valid():
                 form.save()
-                messages.add_message(request, messages.SUCCESS, _('Live settings updated successfully.'))
-                return HttpResponseRedirect('.')
-            messages.add_message(request, messages.ERROR, _('Failed to update live settings.'))
+                messages.add_message(request, messages.SUCCESS, _("Live settings updated successfully."))
+                return HttpResponseRedirect(".")
+            messages.add_message(request, messages.ERROR, _("Failed to update live settings."))
         context = dict(
             self.admin_site.each_context(request),
             config_values=[],
             title=self.model._meta.app_config.verbose_name,
-            app_label='constance',
+            app_label="constance",
             opts=self.model._meta,
             form=form,
             media=self.media + form.media,
-            icon_type='svg',
+            icon_type="svg",
             django_version=get_version(),
         )
         for name, options in settings.CONFIG.items():
-            context['config_values'].append(self.get_config_value(name, options, form, initial))
+            context["config_values"].append(self.get_config_value(name, options, form, initial))
 
         if settings.CONFIG_FIELDSETS:
             if isinstance(settings.CONFIG_FIELDSETS, dict):
@@ -112,11 +112,11 @@ class ConstanceAdmin(admin.ModelAdmin):
             else:
                 fieldset_items = settings.CONFIG_FIELDSETS
 
-            context['fieldsets'] = []
+            context["fieldsets"] = []
             for fieldset_title, fieldset_data in fieldset_items:
                 if isinstance(fieldset_data, dict):
-                    fields_list = fieldset_data['fields']
-                    collapse = fieldset_data.get('collapse', False)
+                    fields_list = fieldset_data["fields"]
+                    collapse = fieldset_data.get("collapse", False)
                 else:
                     fields_list = fieldset_data
                     collapse = False
@@ -124,8 +124,8 @@ class ConstanceAdmin(admin.ModelAdmin):
                 absent_fields = [field for field in fields_list if field not in settings.CONFIG]
                 if any(absent_fields):
                     raise ValueError(
-                        'CONSTANCE_CONFIG_FIELDSETS contains field(s) that does not exist(s): {}'.format(
-                            ', '.join(absent_fields)
+                        "CONSTANCE_CONFIG_FIELDSETS contains field(s) that does not exist(s): {}".format(
+                            ", ".join(absent_fields)
                         )
                     )
 
@@ -135,16 +135,16 @@ class ConstanceAdmin(admin.ModelAdmin):
                     options = settings.CONFIG.get(name)
                     if options:
                         config_values.append(self.get_config_value(name, options, form, initial))
-                fieldset_context = {'title': fieldset_title, 'config_values': config_values}
+                fieldset_context = {"title": fieldset_title, "config_values": config_values}
 
                 if collapse:
-                    fieldset_context['collapse'] = True
-                context['fieldsets'].append(fieldset_context)
+                    fieldset_context["collapse"] = True
+                context["fieldsets"].append(fieldset_context)
             if not isinstance(settings.CONFIG_FIELDSETS, (OrderedDict, tuple)):
-                context['fieldsets'].sort(key=itemgetter('title'))
+                context["fieldsets"].sort(key=itemgetter("title"))
 
         if not isinstance(settings.CONFIG, OrderedDict):
-            context['config_values'].sort(key=itemgetter('name'))
+            context["config_values"].sort(key=itemgetter("name"))
         request.current_app = self.admin_site.name
         return TemplateResponse(request, self.change_list_template, context)
 
@@ -162,11 +162,11 @@ class ConstanceAdmin(admin.ModelAdmin):
 
 class Config:
     class Meta:
-        app_label = 'constance'
-        object_name = 'Config'
+        app_label = "constance"
+        object_name = "Config"
         concrete_model = None
-        model_name = module_name = 'config'
-        verbose_name_plural = _('config')
+        model_name = module_name = "config"
+        verbose_name_plural = _("config")
         abstract = False
         swapped = False
         is_composite_pk = False
@@ -175,7 +175,7 @@ class Config:
             return False
 
         def get_change_permission(self):
-            return f'change_{self.model_name}'
+            return f"change_{self.model_name}"
 
         @property
         def app_config(self):
@@ -183,11 +183,11 @@ class Config:
 
         @property
         def label(self):
-            return f'{self.app_label}.{self.object_name}'
+            return f"{self.app_label}.{self.object_name}"
 
         @property
         def label_lower(self):
-            return f'{self.app_label}.{self.model_name}'
+            return f"{self.app_label}.{self.model_name}"
 
     _meta = Meta()
 
diff --git a/constance/apps.py b/constance/apps.py
index 950be0e..116a64f 100644
--- a/constance/apps.py
+++ b/constance/apps.py
@@ -6,9 +6,9 @@ from constance.checks import check_fieldsets
 
 
 class ConstanceConfig(AppConfig):
-    name = 'constance'
-    verbose_name = _('Constance')
-    default_auto_field = 'django.db.models.AutoField'
+    name = "constance"
+    verbose_name = _("Constance")
+    default_auto_field = "django.db.models.AutoField"
 
     def ready(self):
-        checks.register(check_fieldsets, 'constance')
+        checks.register(check_fieldsets, "constance")
diff --git a/constance/backends/database.py b/constance/backends/database.py
index be3e028..5d4b225 100644
--- a/constance/backends/database.py
+++ b/constance/backends/database.py
@@ -22,7 +22,7 @@ class DatabaseBackend(Backend):
         self._model = Constance
         self._prefix = settings.DATABASE_PREFIX
         self._autofill_timeout = settings.DATABASE_CACHE_AUTOFILL_TIMEOUT
-        self._autofill_cachekey = 'autofilled'
+        self._autofill_cachekey = "autofilled"
 
         if self._model._meta.app_config is None:
             raise ImproperlyConfigured(
@@ -34,9 +34,9 @@ class DatabaseBackend(Backend):
             self._cache = caches[settings.DATABASE_CACHE_BACKEND]
             if isinstance(self._cache, LocMemCache):
                 raise ImproperlyConfigured(
-                    'The CONSTANCE_DATABASE_CACHE_BACKEND setting refers to a '
+                    "The CONSTANCE_DATABASE_CACHE_BACKEND setting refers to a "
                     f"subclass of Django's local-memory backend ({settings.DATABASE_CACHE_BACKEND!r}). Please "
-                    'set it to a backend that supports cross-process caching.'
+                    "set it to a backend that supports cross-process caching."
                 )
         else:
             self._cache = None
@@ -45,7 +45,7 @@ class DatabaseBackend(Backend):
         post_save.connect(self.clear, sender=self._model)
 
     def add_prefix(self, key):
-        return f'{self._prefix}{key}'
+        return f"{self._prefix}{key}"
 
     def autofill(self):
         if not self._autofill_timeout or not self._cache:
@@ -111,7 +111,7 @@ class DatabaseBackend(Backend):
         if not created:
             old_value = loads(constance.value)
             constance.value = dumps(value)
-            constance.save(update_fields=['value'])
+            constance.save(update_fields=["value"])
         else:
             old_value = None
 
diff --git a/constance/backends/redisd.py b/constance/backends/redisd.py
index cb5bef7..22e8f33 100644
--- a/constance/backends/redisd.py
+++ b/constance/backends/redisd.py
@@ -23,14 +23,14 @@ class RedisBackend(Backend):
             try:
                 import redis
             except ImportError:
-                raise ImproperlyConfigured('The Redis backend requires redis-py to be installed.') from None
+                raise ImproperlyConfigured("The Redis backend requires redis-py to be installed.") from None
             if isinstance(settings.REDIS_CONNECTION, str):
                 self._rd = redis.from_url(settings.REDIS_CONNECTION)
             else:
                 self._rd = redis.Redis(**settings.REDIS_CONNECTION)
 
     def add_prefix(self, key):
-        return f'{self._prefix}{key}'
+        return f"{self._prefix}{key}"
 
     def get(self, key):
         value = self._rd.get(self.add_prefix(key))
diff --git a/constance/base.py b/constance/base.py
index 614ed3e..92e6dfa 100644
--- a/constance/base.py
+++ b/constance/base.py
@@ -6,7 +6,7 @@ class Config:
     """The global config wrapper that handles the backend."""
 
     def __init__(self):
-        super().__setattr__('_backend', utils.import_module_attr(settings.BACKEND)())
+        super().__setattr__("_backend", utils.import_module_attr(settings.BACKEND)())
 
     def __getattr__(self, key):
         try:
diff --git a/constance/checks.py b/constance/checks.py
index 9b3b1ba..1ad2034 100644
--- a/constance/checks.py
+++ b/constance/checks.py
@@ -14,22 +14,22 @@ def check_fieldsets(*args, **kwargs) -> list[CheckMessage]:
 
     errors = []
 
-    if hasattr(settings, 'CONFIG_FIELDSETS') and settings.CONFIG_FIELDSETS:
+    if hasattr(settings, "CONFIG_FIELDSETS") and settings.CONFIG_FIELDSETS:
         missing_keys, extra_keys = get_inconsistent_fieldnames()
         if missing_keys:
             check = checks.Warning(
-                _('CONSTANCE_CONFIG_FIELDSETS is missing field(s) that exists in CONSTANCE_CONFIG.'),
-                hint=', '.join(sorted(missing_keys)),
-                obj='settings.CONSTANCE_CONFIG',
-                id='constance.E001',
+                _("CONSTANCE_CONFIG_FIELDSETS is missing field(s) that exists in CONSTANCE_CONFIG."),
+                hint=", ".join(sorted(missing_keys)),
+                obj="settings.CONSTANCE_CONFIG",
+                id="constance.E001",
             )
             errors.append(check)
         if extra_keys:
             check = checks.Warning(
-                _('CONSTANCE_CONFIG_FIELDSETS contains extra field(s) that does not exist in CONFIG.'),
-                hint=', '.join(sorted(extra_keys)),
-                obj='settings.CONSTANCE_CONFIG',
-                id='constance.E002',
+                _("CONSTANCE_CONFIG_FIELDSETS contains extra field(s) that does not exist in CONFIG."),
+                hint=", ".join(sorted(extra_keys)),
+                obj="settings.CONSTANCE_CONFIG",
+                id="constance.E002",
             )
             errors.append(check)
     return errors
@@ -53,8 +53,8 @@ def get_inconsistent_fieldnames() -> tuple[set, set]:
     for _fieldset_title, fields_list in fieldset_items:
         # fields_list can be a dictionary, when a fieldset is defined as collapsible
         # https://django-constance.readthedocs.io/en/latest/#fieldsets-collapsing
-        if isinstance(fields_list, dict) and 'fields' in fields_list:
-            fields_list = fields_list['fields']
+        if isinstance(fields_list, dict) and "fields" in fields_list:
+            fields_list = fields_list["fields"]
         unique_field_names.update(fields_list)
     if not unique_field_names:
         return unique_field_names, unique_field_names
diff --git a/constance/codecs.py b/constance/codecs.py
index 9219a94..7804a62 100644
--- a/constance/codecs.py
+++ b/constance/codecs.py
@@ -14,7 +14,7 @@ from typing import TypeVar
 
 logger = logging.getLogger(__name__)
 
-DEFAULT_DISCRIMINATOR = 'default'
+DEFAULT_DISCRIMINATOR = "default"
 
 
 class JSONEncoder(json.JSONEncoder):
@@ -24,11 +24,11 @@ class JSONEncoder(json.JSONEncoder):
         for discriminator, (t, _, encoder) in _codecs.items():
             if isinstance(o, t):
                 return _as(discriminator, encoder(o))
-        raise TypeError(f'Object of type {o.__class__.__name__} is not JSON serializable')
+        raise TypeError(f"Object of type {o.__class__.__name__} is not JSON serializable")
 
 
 def _as(discriminator: str, v: Any) -> dict[str, Any]:
-    return {'__type__': discriminator, '__value__': v}
+    return {"__type__": discriminator, "__value__": v}
 
 
 def dumps(obj, _dumps=json.dumps, cls=JSONEncoder, default_kwargs=None, **kwargs):
@@ -44,7 +44,7 @@ def loads(s, _loads=json.loads, *, first_level=True, **kwargs):
     """Deserialize json string to object."""
     if first_level:
         return _loads(s, object_hook=object_hook, **kwargs)
-    if isinstance(s, dict) and '__type__' not in s and '__value__' not in s:
+    if isinstance(s, dict) and "__type__" not in s and "__value__" not in s:
         return {k: loads(v, first_level=False) for k, v in s.items()}
     if isinstance(s, list):
         return list(loads(v, first_level=False) for v in s)
@@ -53,20 +53,20 @@ def loads(s, _loads=json.loads, *, first_level=True, **kwargs):
 
 def object_hook(o: dict) -> Any:
     """Hook function to perform custom deserialization."""
-    if o.keys() == {'__type__', '__value__'}:
-        if o['__type__'] == DEFAULT_DISCRIMINATOR:
-            return o['__value__']
-        codec = _codecs.get(o['__type__'])
+    if o.keys() == {"__type__", "__value__"}:
+        if o["__type__"] == DEFAULT_DISCRIMINATOR:
+            return o["__value__"]
+        codec = _codecs.get(o["__type__"])
         if not codec:
-            raise ValueError(f'Unsupported type: {o["__type__"]}')
-        return codec[1](o['__value__'])
-    if '__type__' not in o and '__value__' not in o:
+            raise ValueError(f"Unsupported type: {o['__type__']}")
+        return codec[1](o["__value__"])
+    if "__type__" not in o and "__value__" not in o:
         return o
-    logger.error('Cannot deserialize object: %s', o)
-    raise ValueError(f'Invalid object: {o}')
+    logger.error("Cannot deserialize object: %s", o)
+    raise ValueError(f"Invalid object: {o}")
 
 
-T = TypeVar('T')
+T = TypeVar("T")
 
 
 class Encoder(Protocol[T]):
@@ -79,9 +79,9 @@ class Decoder(Protocol[T]):
 
 def register_type(t: type[T], discriminator: str, encoder: Encoder[T], decoder: Decoder[T]):
     if not discriminator:
-        raise ValueError('Discriminator must be specified')
+        raise ValueError("Discriminator must be specified")
     if _codecs.get(discriminator) or discriminator == DEFAULT_DISCRIMINATOR:
-        raise ValueError(f'Type with discriminator {discriminator} is already registered')
+        raise ValueError(f"Type with discriminator {discriminator} is already registered")
     _codecs[discriminator] = (t, decoder, encoder)
 
 
@@ -90,12 +90,12 @@ _codecs: dict[str, tuple[type, Decoder, Encoder]] = {}
 
 def _register_default_types():
     # NOTE: datetime should be registered before date, because datetime is also instance of date.
-    register_type(datetime, 'datetime', datetime.isoformat, datetime.fromisoformat)
-    register_type(date, 'date', lambda o: o.isoformat(), lambda o: datetime.fromisoformat(o).date())
-    register_type(time, 'time', lambda o: o.isoformat(), time.fromisoformat)
-    register_type(Decimal, 'decimal', str, Decimal)
-    register_type(uuid.UUID, 'uuid', lambda o: o.hex, uuid.UUID)
-    register_type(timedelta, 'timedelta', lambda o: o.total_seconds(), lambda o: timedelta(seconds=o))
+    register_type(datetime, "datetime", datetime.isoformat, datetime.fromisoformat)
+    register_type(date, "date", lambda o: o.isoformat(), lambda o: datetime.fromisoformat(o).date())
+    register_type(time, "time", lambda o: o.isoformat(), time.fromisoformat)
+    register_type(Decimal, "decimal", str, Decimal)
+    register_type(uuid.UUID, "uuid", lambda o: o.hex, uuid.UUID)
+    register_type(timedelta, "timedelta", lambda o: o.total_seconds(), lambda o: timedelta(seconds=o))
 
 
 _register_default_types()
diff --git a/constance/context_processors.py b/constance/context_processors.py
index ab8d922..3a3da33 100644
--- a/constance/context_processors.py
+++ b/constance/context_processors.py
@@ -12,4 +12,4 @@ def config(request):
         )
 
     """
-    return {'config': constance.config}
+    return {"config": constance.config}
diff --git a/constance/forms.py b/constance/forms.py
index 5d52755..321ab47 100644
--- a/constance/forms.py
+++ b/constance/forms.py
@@ -25,27 +25,27 @@ from .checks import get_inconsistent_fieldnames
 
 config = LazyConfig()
 
-NUMERIC_WIDGET = forms.TextInput(attrs={'size': 10})
+NUMERIC_WIDGET = forms.TextInput(attrs={"size": 10})
 
-INTEGER_LIKE = (fields.IntegerField, {'widget': NUMERIC_WIDGET})
+INTEGER_LIKE = (fields.IntegerField, {"widget": NUMERIC_WIDGET})
 STRING_LIKE = (
     fields.CharField,
     {
-        'widget': forms.Textarea(attrs={'rows': 3}),
-        'required': False,
+        "widget": forms.Textarea(attrs={"rows": 3}),
+        "required": False,
     },
 )
 
 FIELDS = {
-    bool: (fields.BooleanField, {'required': False}),
+    bool: (fields.BooleanField, {"required": False}),
     int: INTEGER_LIKE,
-    Decimal: (fields.DecimalField, {'widget': NUMERIC_WIDGET}),
+    Decimal: (fields.DecimalField, {"widget": NUMERIC_WIDGET}),
     str: STRING_LIKE,
-    datetime: (fields.SplitDateTimeField, {'widget': widgets.AdminSplitDateTime}),
-    timedelta: (fields.DurationField, {'widget': widgets.AdminTextInputWidget}),
-    date: (fields.DateField, {'widget': widgets.AdminDateWidget}),
-    time: (fields.TimeField, {'widget': widgets.AdminTimeWidget}),
-    float: (fields.FloatField, {'widget': NUMERIC_WIDGET}),
+    datetime: (fields.SplitDateTimeField, {"widget": widgets.AdminSplitDateTime}),
+    timedelta: (fields.DurationField, {"widget": widgets.AdminTextInputWidget}),
+    date: (fields.DateField, {"widget": widgets.AdminDateWidget}),
+    time: (fields.TimeField, {"widget": widgets.AdminTimeWidget}),
+    float: (fields.FloatField, {"widget": NUMERIC_WIDGET}),
 }
 
 
@@ -58,12 +58,12 @@ def parse_additional_fields(fields):
 
         field[0] = import_string(field[0])
 
-        if 'widget' in field[1]:
-            klass = import_string(field[1]['widget'])
-            field[1]['widget'] = klass(**(field[1].get('widget_kwargs', {}) or {}))
+        if "widget" in field[1]:
+            klass = import_string(field[1]["widget"])
+            field[1]["widget"] = klass(**(field[1].get("widget_kwargs", {}) or {}))
 
-            if 'widget_kwargs' in field[1]:
-                del field[1]['widget_kwargs']
+            if "widget_kwargs" in field[1]:
+                del field[1]["widget_kwargs"]
 
         fields[key] = field
 
@@ -80,7 +80,7 @@ class ConstanceForm(forms.Form):
         super().__init__(*args, initial=initial, **kwargs)
         version_hash = hashlib.sha256()
 
-        only_view = request and not request.user.has_perm('constance.change_config')
+        only_view = request and not request.user.has_perm("constance.change_config")
         if only_view:
             messages.warning(
                 request,
@@ -94,13 +94,13 @@ class ConstanceForm(forms.Form):
                 if config_type not in settings.ADDITIONAL_FIELDS and not isinstance(default, config_type):
                     raise ImproperlyConfigured(
                         _(
-                            'Default value type must be '
-                            'equal to declared config '
-                            'parameter type. Please fix '
-                            'the default value of '
+                            "Default value type must be "
+                            "equal to declared config "
+                            "parameter type. Please fix "
+                            "the default value of "
                             "'%(name)s'."
                         )
-                        % {'name': name}
+                        % {"name": name}
                     )
             else:
                 config_type = type(default)
@@ -109,19 +109,19 @@ class ConstanceForm(forms.Form):
                 raise ImproperlyConfigured(
                     _(
                         "Constance doesn't support "
-                        'config values of the type '
-                        '%(config_type)s. Please fix '
+                        "config values of the type "
+                        "%(config_type)s. Please fix "
                         "the value of '%(name)s'."
                     )
-                    % {'config_type': config_type, 'name': name}
+                    % {"config_type": config_type, "name": name}
                 )
             field_class, kwargs = FIELDS[config_type]
             if only_view:
-                kwargs['disabled'] = True
+                kwargs["disabled"] = True
             self.fields[name] = field_class(label=name, **kwargs)
 
-            version_hash.update(smart_bytes(initial.get(name, '')))
-        self.initial['version'] = version_hash.hexdigest()
+            version_hash.update(smart_bytes(initial.get(name, "")))
+        self.initial["version"] = version_hash.hexdigest()
 
     def save(self):
         for file_field in self.files:
@@ -142,14 +142,14 @@ class ConstanceForm(forms.Form):
                 setattr(config, name, new)
 
     def clean_version(self):
-        value = self.cleaned_data['version']
+        value = self.cleaned_data["version"]
 
         if settings.IGNORE_ADMIN_VERSION_CHECK:
             return value
 
-        if value != self.initial['version']:
+        if value != self.initial["version"]:
             raise forms.ValidationError(
-                _('The settings have been modified by someone else. Please reload the form and resubmit your changes.')
+                _("The settings have been modified by someone else. Please reload the form and resubmit your changes.")
             )
         return value
 
@@ -162,7 +162,7 @@ class ConstanceForm(forms.Form):
         missing_keys, extra_keys = get_inconsistent_fieldnames()
         if missing_keys or extra_keys:
             raise forms.ValidationError(
-                _('CONSTANCE_CONFIG_FIELDSETS is missing field(s) that exists in CONSTANCE_CONFIG.')
+                _("CONSTANCE_CONFIG_FIELDSETS is missing field(s) that exists in CONSTANCE_CONFIG.")
             )
 
         return cleaned_data
diff --git a/constance/management/commands/constance.py b/constance/management/commands/constance.py
index 289b459..9af50b4 100644
--- a/constance/management/commands/constance.py
+++ b/constance/management/commands/constance.py
@@ -26,36 +26,36 @@ def _set_constance_value(key, value):
 
 
 class Command(BaseCommand):
-    help = _('Get/Set In-database config settings handled by Constance')
+    help = _("Get/Set In-database config settings handled by Constance")
 
-    GET = 'get'
-    SET = 'set'
-    LIST = 'list'
-    REMOVE_STALE_KEYS = 'remove_stale_keys'
+    GET = "get"
+    SET = "set"
+    LIST = "list"
+    REMOVE_STALE_KEYS = "remove_stale_keys"
 
     def add_arguments(self, parser):
-        subparsers = parser.add_subparsers(dest='command')
-        subparsers.add_parser(self.LIST, help='list all Constance keys and their values')
+        subparsers = parser.add_subparsers(dest="command")
+        subparsers.add_parser(self.LIST, help="list all Constance keys and their values")
 
-        parser_get = subparsers.add_parser(self.GET, help='get the value of a Constance key')
-        parser_get.add_argument('key', help='name of the key to get', metavar='KEY')
+        parser_get = subparsers.add_parser(self.GET, help="get the value of a Constance key")
+        parser_get.add_argument("key", help="name of the key to get", metavar="KEY")
 
-        parser_set = subparsers.add_parser(self.SET, help='set the value of a Constance key')
-        parser_set.add_argument('key', help='name of the key to set', metavar='KEY')
+        parser_set = subparsers.add_parser(self.SET, help="set the value of a Constance key")
+        parser_set.add_argument("key", help="name of the key to set", metavar="KEY")
         # use nargs='+' so that we pass a list to MultiValueField (eg SplitDateTimeField)
-        parser_set.add_argument('value', help='value to set', metavar='VALUE', nargs='+')
+        parser_set.add_argument("value", help="value to set", metavar="VALUE", nargs="+")
 
         subparsers.add_parser(
             self.REMOVE_STALE_KEYS,
-            help='delete all Constance keys and their values if they are not in settings.CONSTANCE_CONFIG (stale keys)',
+            help="delete all Constance keys and their values if they are not in settings.CONSTANCE_CONFIG (stale keys)",
         )
 
     def handle(self, command, key=None, value=None, *args, **options):
         if command == self.GET:
             try:
-                self.stdout.write(str(getattr(config, key)), ending='\n')
+                self.stdout.write(str(getattr(config, key)), ending="\n")
             except AttributeError as e:
-                raise CommandError(f'{key} is not defined in settings.CONSTANCE_CONFIG') from e
+                raise CommandError(f"{key} is not defined in settings.CONSTANCE_CONFIG") from e
         elif command == self.SET:
             try:
                 if len(value) == 1:
@@ -63,21 +63,21 @@ class Command(BaseCommand):
                     value = value[0]
                 _set_constance_value(key, value)
             except KeyError as e:
-                raise CommandError(f'{key} is not defined in settings.CONSTANCE_CONFIG') from e
+                raise CommandError(f"{key} is not defined in settings.CONSTANCE_CONFIG") from e
             except ValidationError as e:
-                raise CommandError(', '.join(e)) from e
+                raise CommandError(", ".join(e)) from e
         elif command == self.LIST:
             for k, v in get_values().items():
-                self.stdout.write(f'{k}\t{v}', ending='\n')
+                self.stdout.write(f"{k}\t{v}", ending="\n")
         elif command == self.REMOVE_STALE_KEYS:
             actual_keys = settings.CONSTANCE_CONFIG.keys()
             stale_records = Constance.objects.exclude(key__in=actual_keys)
             if stale_records:
-                self.stdout.write('The following record will be deleted:', ending='\n')
+                self.stdout.write("The following record will be deleted:", ending="\n")
             else:
-                self.stdout.write('There are no stale records in the database.', ending='\n')
+                self.stdout.write("There are no stale records in the database.", ending="\n")
             for stale_record in stale_records:
-                self.stdout.write(f'{stale_record.key}\t{stale_record.value}', ending='\n')
+                self.stdout.write(f"{stale_record.key}\t{stale_record.value}", ending="\n")
             stale_records.delete()
         else:
-            raise CommandError('Invalid command')
+            raise CommandError("Invalid command")
diff --git a/constance/migrations/0001_initial.py b/constance/migrations/0001_initial.py
index f1e187a..6f3e663 100644
--- a/constance/migrations/0001_initial.py
+++ b/constance/migrations/0001_initial.py
@@ -9,16 +9,16 @@ class Migration(migrations.Migration):
 
     operations = [
         migrations.CreateModel(
-            name='Constance',
+            name="Constance",
             fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('key', models.CharField(max_length=255, unique=True)),
-                ('value', models.TextField(blank=True, editable=False, null=True)),
+                ("id", models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("key", models.CharField(max_length=255, unique=True)),
+                ("value", models.TextField(blank=True, editable=False, null=True)),
             ],
             options={
-                'verbose_name': 'constance',
-                'verbose_name_plural': 'constances',
-                'permissions': [('change_config', 'Can change config'), ('view_config', 'Can view config')],
+                "verbose_name": "constance",
+                "verbose_name_plural": "constances",
+                "permissions": [("change_config", "Can change config"), ("view_config", "Can view config")],
             },
         ),
     ]
diff --git a/constance/migrations/0002_migrate_from_old_table.py b/constance/migrations/0002_migrate_from_old_table.py
index 9e88284..f4aee78 100644
--- a/constance/migrations/0002_migrate_from_old_table.py
+++ b/constance/migrations/0002_migrate_from_old_table.py
@@ -12,19 +12,19 @@ def _migrate_from_old_table(apps, schema_editor) -> None:
     On new installations just ignore error that table does not exist.
     """
     connection = schema_editor.connection
-    quoted_string = ', '.join([connection.ops.quote_name(item) for item in ['id', 'key', 'value']])
-    old_table_name = 'constance_config'
+    quoted_string = ", ".join([connection.ops.quote_name(item) for item in ["id", "key", "value"]])
+    old_table_name = "constance_config"
     with connection.cursor() as cursor:
         if old_table_name not in connection.introspection.table_names():
-            logger.info('Old table does not exist, skipping')
+            logger.info("Old table does not exist, skipping")
             return
         cursor.execute(
-            f'INSERT INTO constance_constance ( {quoted_string} ) SELECT {quoted_string} FROM {old_table_name}',  # noqa: S608
+            f"INSERT INTO constance_constance ( {quoted_string} ) SELECT {quoted_string} FROM {old_table_name}",  # noqa: S608
             [],
         )
-        cursor.execute(f'DROP TABLE {old_table_name}', [])
+        cursor.execute(f"DROP TABLE {old_table_name}", [])
 
-    Constance = apps.get_model('constance', 'Constance')
+    Constance = apps.get_model("constance", "Constance")
     sequence_sql = connection.ops.sequence_reset_sql(no_style(), [Constance])
     with connection.cursor() as cursor:
         for sql in sequence_sql:
@@ -32,7 +32,7 @@ def _migrate_from_old_table(apps, schema_editor) -> None:
 
 
 class Migration(migrations.Migration):
-    dependencies = [('constance', '0001_initial')]
+    dependencies = [("constance", "0001_initial")]
 
     atomic = False
 
diff --git a/constance/migrations/0003_drop_pickle.py b/constance/migrations/0003_drop_pickle.py
index fdfc15b..d64dcb0 100644
--- a/constance/migrations/0003_drop_pickle.py
+++ b/constance/migrations/0003_drop_pickle.py
@@ -15,7 +15,7 @@ logger = logging.getLogger(__name__)
 def is_already_migrated(value):
     try:
         data = json.loads(value)
-        if isinstance(data, dict) and set(data.keys()) == {'__type__', '__value__'}:
+        if isinstance(data, dict) and set(data.keys()) == {"__type__", "__value__"}:
             return True
     except (json.JSONDecodeError, TypeError, UnicodeDecodeError):
         return False
@@ -23,21 +23,21 @@ def is_already_migrated(value):
 
 
 def import_module_attr(path):
-    package, module = path.rsplit('.', 1)
+    package, module = path.rsplit(".", 1)
     return getattr(import_module(package), module)
 
 
 def migrate_pickled_data(apps, schema_editor) -> None:  # pragma: no cover
-    Constance = apps.get_model('constance', 'Constance')
+    Constance = apps.get_model("constance", "Constance")
 
     for constance in Constance.objects.exclude(value=None):
         if not is_already_migrated(constance.value):
             constance.value = dumps(pickle.loads(b64decode(constance.value.encode())))  # noqa: S301
-            constance.save(update_fields=['value'])
+            constance.save(update_fields=["value"])
 
     if settings.BACKEND in (
-        'constance.backends.redisd.RedisBackend',
-        'constance.backends.redisd.CachingRedisBackend',
+        "constance.backends.redisd.RedisBackend",
+        "constance.backends.redisd.CachingRedisBackend",
     ):
         import redis
 
@@ -52,7 +52,7 @@ def migrate_pickled_data(apps, schema_editor) -> None:  # pragma: no cover
                 _rd = redis.Redis(**settings.REDIS_CONNECTION)
         redis_migrated_data = {}
         for key in settings.CONFIG:
-            prefixed_key = f'{_prefix}{key}'
+            prefixed_key = f"{_prefix}{key}"
             value = _rd.get(prefixed_key)
             if value is not None and not is_already_migrated(value):
                 redis_migrated_data[prefixed_key] = dumps(pickle.loads(value))  # noqa: S301
@@ -61,7 +61,7 @@ def migrate_pickled_data(apps, schema_editor) -> None:  # pragma: no cover
 
 
 class Migration(migrations.Migration):
-    dependencies = [('constance', '0002_migrate_from_old_table')]
+    dependencies = [("constance", "0002_migrate_from_old_table")]
 
     operations = [
         migrations.RunPython(migrate_pickled_data),
diff --git a/constance/models.py b/constance/models.py
index 49213b4..be4ffc4 100644
--- a/constance/models.py
+++ b/constance/models.py
@@ -7,11 +7,11 @@ class Constance(models.Model):
     value = models.TextField(null=True, blank=True, editable=False)
 
     class Meta:
-        verbose_name = _('constance')
-        verbose_name_plural = _('constances')
+        verbose_name = _("constance")
+        verbose_name_plural = _("constances")
         permissions = [
-            ('change_config', 'Can change config'),
-            ('view_config', 'Can view config'),
+            ("change_config", "Can change config"),
+            ("view_config", "Can view config"),
         ]
 
     def __str__(self):
diff --git a/constance/settings.py b/constance/settings.py
index fd8045c..988ca84 100644
--- a/constance/settings.py
+++ b/constance/settings.py
@@ -1,29 +1,29 @@
 from django.conf import settings
 
-BACKEND = getattr(settings, 'CONSTANCE_BACKEND', 'constance.backends.redisd.RedisBackend')
+BACKEND = getattr(settings, "CONSTANCE_BACKEND", "constance.backends.redisd.RedisBackend")
 
-CONFIG = getattr(settings, 'CONSTANCE_CONFIG', {})
+CONFIG = getattr(settings, "CONSTANCE_CONFIG", {})
 
-CONFIG_FIELDSETS = getattr(settings, 'CONSTANCE_CONFIG_FIELDSETS', {})
+CONFIG_FIELDSETS = getattr(settings, "CONSTANCE_CONFIG_FIELDSETS", {})
 
-ADDITIONAL_FIELDS = getattr(settings, 'CONSTANCE_ADDITIONAL_FIELDS', {})
+ADDITIONAL_FIELDS = getattr(settings, "CONSTANCE_ADDITIONAL_FIELDS", {})
 
-FILE_ROOT = getattr(settings, 'CONSTANCE_FILE_ROOT', '')
+FILE_ROOT = getattr(settings, "CONSTANCE_FILE_ROOT", "")
 
-DATABASE_CACHE_BACKEND = getattr(settings, 'CONSTANCE_DATABASE_CACHE_BACKEND', None)
+DATABASE_CACHE_BACKEND = getattr(settings, "CONSTANCE_DATABASE_CACHE_BACKEND", None)
 
-DATABASE_CACHE_AUTOFILL_TIMEOUT = getattr(settings, 'CONSTANCE_DATABASE_CACHE_AUTOFILL_TIMEOUT', 60 * 60 * 24)
+DATABASE_CACHE_AUTOFILL_TIMEOUT = getattr(settings, "CONSTANCE_DATABASE_CACHE_AUTOFILL_TIMEOUT", 60 * 60 * 24)
 
-DATABASE_PREFIX = getattr(settings, 'CONSTANCE_DATABASE_PREFIX', '')
+DATABASE_PREFIX = getattr(settings, "CONSTANCE_DATABASE_PREFIX", "")
 
-REDIS_PREFIX = getattr(settings, 'CONSTANCE_REDIS_PREFIX', 'constance:')
+REDIS_PREFIX = getattr(settings, "CONSTANCE_REDIS_PREFIX", "constance:")
 
-REDIS_CACHE_TIMEOUT = getattr(settings, 'CONSTANCE_REDIS_CACHE_TIMEOUT', 60)
+REDIS_CACHE_TIMEOUT = getattr(settings, "CONSTANCE_REDIS_CACHE_TIMEOUT", 60)
 
-REDIS_CONNECTION_CLASS = getattr(settings, 'CONSTANCE_REDIS_CONNECTION_CLASS', None)
+REDIS_CONNECTION_CLASS = getattr(settings, "CONSTANCE_REDIS_CONNECTION_CLASS", None)
 
-REDIS_CONNECTION = getattr(settings, 'CONSTANCE_REDIS_CONNECTION', {})
+REDIS_CONNECTION = getattr(settings, "CONSTANCE_REDIS_CONNECTION", {})
 
-SUPERUSER_ONLY = getattr(settings, 'CONSTANCE_SUPERUSER_ONLY', True)
+SUPERUSER_ONLY = getattr(settings, "CONSTANCE_SUPERUSER_ONLY", True)
 
-IGNORE_ADMIN_VERSION_CHECK = getattr(settings, 'CONSTANCE_IGNORE_ADMIN_VERSION_CHECK', False)
+IGNORE_ADMIN_VERSION_CHECK = getattr(settings, "CONSTANCE_IGNORE_ADMIN_VERSION_CHECK", False)
diff --git a/constance/test/__init__.py b/constance/test/__init__.py
index 9c1a2bb..2679500 100644
--- a/constance/test/__init__.py
+++ b/constance/test/__init__.py
@@ -1,3 +1,3 @@
 from .unittest import override_config  # pragma: no cover
 
-__all__ = ['override_config']
+__all__ = ["override_config"]
diff --git a/constance/test/pytest.py b/constance/test/pytest.py
index cd3f8b5..651ec83 100644
--- a/constance/test/pytest.py
+++ b/constance/test/pytest.py
@@ -14,16 +14,16 @@ from constance import config as constance_config
 @pytest.hookimpl(trylast=True)
 def pytest_configure(config):  # pragma: no cover
     """Register override_config marker."""
-    config.addinivalue_line('markers', ('override_config(**kwargs): mark test to override django-constance config'))
+    config.addinivalue_line("markers", ("override_config(**kwargs): mark test to override django-constance config"))
 
 
 @pytest.hookimpl(hookwrapper=True)
 def pytest_runtest_call(item):  # pragma: no cover
     """Validate constance override marker params. Run test with overridden config."""
-    marker = item.get_closest_marker('override_config')
+    marker = item.get_closest_marker("override_config")
     if marker is not None:
         if marker.args:
-            pytest.fail('Constance override can not not accept positional args')
+            pytest.fail("Constance override can not not accept positional args")
         with override_config(**marker.kwargs):
             yield
     else:
@@ -59,7 +59,7 @@ class override_config(ContextDecorator):
         self.disable()
 
 
-@pytest.fixture(name='override_config')
+@pytest.fixture(name="override_config")
 def _override_config():
     """Make override_config available as a function fixture."""
     return override_config
diff --git a/constance/test/unittest.py b/constance/test/unittest.py
index 510aab0..779300c 100644
--- a/constance/test/unittest.py
+++ b/constance/test/unittest.py
@@ -6,7 +6,7 @@ from django.test.utils import override_settings
 
 from constance import config
 
-__all__ = ('override_config',)
+__all__ = ("override_config",)
 
 
 class override_config(override_settings):
@@ -24,7 +24,7 @@ class override_config(override_settings):
         """Modify the decorated function to override config values."""
         if isinstance(test_func, type):
             if not issubclass(test_func, SimpleTestCase):
-                raise Exception('Only subclasses of Django SimpleTestCase can be decorated with override_config')
+                raise Exception("Only subclasses of Django SimpleTestCase can be decorated with override_config")
             return self.modify_test_case(test_func)
 
         @wraps(test_func)
diff --git a/constance/utils.py b/constance/utils.py
index e3ec12c..87dfe85 100644
--- a/constance/utils.py
+++ b/constance/utils.py
@@ -7,7 +7,7 @@ config = LazyConfig()
 
 
 def import_module_attr(path):
-    package, module = path.rsplit('.', 1)
+    package, module = path.rsplit(".", 1)
     return getattr(import_module(package), module)
 
 
@@ -31,7 +31,7 @@ def get_values_for_keys(keys):
     :raises AttributeError: If any key is not found in the configuration.
     """
     if not isinstance(keys, (list, tuple, set)):
-        raise TypeError('keys must be a list, tuple, or set of strings')
+        raise TypeError("keys must be a list, tuple, or set of strings")
 
     # Prepare default initial mapping
     default_initial = {name: options[0] for name, options in settings.CONFIG.items() if name in keys}
diff --git a/docs/conf.py b/docs/conf.py
index 467a8bb..3526dd1 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -10,56 +10,56 @@ from datetime import datetime
 
 
 def get_version():
-    with open('../pyproject.toml') as f:
+    with open("../pyproject.toml") as f:
         for line in f:
             match = re.match(r'version = "(.*)"', line)
             if match:
                 return match.group(1)
-    return '0.0.0'
+    return "0.0.0"
 
 
-os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'tests.settings')
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "tests.settings")
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
-sys.path.insert(0, os.path.abspath('extensions'))
-sys.path.insert(0, os.path.abspath('..'))
+sys.path.insert(0, os.path.abspath("extensions"))
+sys.path.insert(0, os.path.abspath(".."))
 
 # -- Project information -----------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 
-project = 'django-constance'
-project_copyright = datetime.now().year.__str__() + ', Jazzband'
+project = "django-constance"
+project_copyright = datetime.now().year.__str__() + ", Jazzband"
 
 # The full version, including alpha/beta/rc tags
 release = get_version()
 # The short X.Y version
-version = '.'.join(release.split('.')[:3])
+version = ".".join(release.split(".")[:3])
 
 # -- General configuration ------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
 extensions = [
-    'sphinx.ext.intersphinx',
-    'sphinx.ext.todo',
-    'sphinx_search.extension',
-    'settings',
+    "sphinx.ext.intersphinx",
+    "sphinx.ext.todo",
+    "sphinx_search.extension",
+    "settings",
 ]
 
-templates_path = ['_templates']
-source_suffix = '.rst'
-root_doc = 'index'
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
-pygments_style = 'sphinx'
-html_last_updated_fmt = ''
+templates_path = ["_templates"]
+source_suffix = ".rst"
+root_doc = "index"
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
+pygments_style = "sphinx"
+html_last_updated_fmt = ""
 
 # -- Options for HTML output -------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
 
-html_theme = 'sphinx_rtd_theme'
-html_static_path = ['_static']
-htmlhelp_basename = 'django-constancedoc'
+html_theme = "sphinx_rtd_theme"
+html_static_path = ["_static"]
+htmlhelp_basename = "django-constancedoc"
 
 # -- Options for LaTeX output ---------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-latex-output
@@ -67,31 +67,31 @@ htmlhelp_basename = 'django-constancedoc'
 latex_elements = {}
 
 latex_documents = [
-    ('index', 'django-constance.tex', 'django-constance Documentation', 'Jazzband', 'manual'),
+    ("index", "django-constance.tex", "django-constance Documentation", "Jazzband", "manual"),
 ]
 
 # -- Options for manual page output ---------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-manual-page-output
 
-man_pages = [('index', 'django-constance', 'django-constance Documentation', ['Jazzband'], 1)]
+man_pages = [("index", "django-constance", "django-constance Documentation", ["Jazzband"], 1)]
 
 # -- Options for Texinfo output -------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-texinfo-output
 
 texinfo_documents = [
     (
-        'index',
-        'django-constance',
-        'django-constance Documentation',
-        'Jazzband',
-        'django-constance',
-        'One line description of project.',
-        'Miscellaneous',
+        "index",
+        "django-constance",
+        "django-constance Documentation",
+        "Jazzband",
+        "django-constance",
+        "One line description of project.",
+        "Miscellaneous",
     ),
 ]
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
-    'python': ('https://docs.python.org/3', None),
-    'django': ('https://docs.djangoproject.com/en/dev/', 'https://docs.djangoproject.com/en/dev/_objects/'),
+    "python": ("https://docs.python.org/3", None),
+    "django": ("https://docs.djangoproject.com/en/dev/", "https://docs.djangoproject.com/en/dev/_objects/"),
 }
diff --git a/docs/extensions/settings.py b/docs/extensions/settings.py
index 7cf389a..2551233 100644
--- a/docs/extensions/settings.py
+++ b/docs/extensions/settings.py
@@ -1,6 +1,6 @@
 def setup(app):
     app.add_crossref_type(
-        directivename='setting',
-        rolename='setting',
-        indextemplate='pair: %s; setting',
+        directivename="setting",
+        rolename="setting",
+        indextemplate="pair: %s; setting",
     )
diff --git a/example/cheeseshop/apps/catalog/migrations/0001_initial.py b/example/cheeseshop/apps/catalog/migrations/0001_initial.py
index cfbae89..2a6ac9d 100644
--- a/example/cheeseshop/apps/catalog/migrations/0001_initial.py
+++ b/example/cheeseshop/apps/catalog/migrations/0001_initial.py
@@ -7,10 +7,10 @@ class Migration(migrations.Migration):
 
     operations = [
         migrations.CreateModel(
-            name='Brand',
+            name="Brand",
             fields=[
-                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('name', models.CharField(max_length=75)),
+                ("id", models.AutoField(verbose_name="ID", serialize=False, auto_created=True, primary_key=True)),
+                ("name", models.CharField(max_length=75)),
             ],
         ),
     ]
diff --git a/example/cheeseshop/apps/storage/migrations/0001_initial.py b/example/cheeseshop/apps/storage/migrations/0001_initial.py
index f5970be..5b240aa 100644
--- a/example/cheeseshop/apps/storage/migrations/0001_initial.py
+++ b/example/cheeseshop/apps/storage/migrations/0001_initial.py
@@ -7,23 +7,23 @@ class Migration(migrations.Migration):
 
     operations = [
         migrations.CreateModel(
-            name='Shelf',
+            name="Shelf",
             fields=[
-                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('name', models.CharField(max_length=75)),
+                ("id", models.AutoField(verbose_name="ID", serialize=False, auto_created=True, primary_key=True)),
+                ("name", models.CharField(max_length=75)),
             ],
             options={
-                'verbose_name_plural': 'shelves',
+                "verbose_name_plural": "shelves",
             },
         ),
         migrations.CreateModel(
-            name='Supply',
+            name="Supply",
             fields=[
-                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('name', models.CharField(max_length=75)),
+                ("id", models.AutoField(verbose_name="ID", serialize=False, auto_created=True, primary_key=True)),
+                ("name", models.CharField(max_length=75)),
             ],
             options={
-                'verbose_name_plural': 'supplies',
+                "verbose_name_plural": "supplies",
             },
         ),
     ]
diff --git a/example/cheeseshop/apps/storage/models.py b/example/cheeseshop/apps/storage/models.py
index 367a9c1..2271795 100644
--- a/example/cheeseshop/apps/storage/models.py
+++ b/example/cheeseshop/apps/storage/models.py
@@ -5,11 +5,11 @@ class Shelf(models.Model):
     name = models.CharField(max_length=75)
 
     class Meta:
-        verbose_name_plural = 'shelves'
+        verbose_name_plural = "shelves"
 
 
 class Supply(models.Model):
     name = models.CharField(max_length=75)
 
     class Meta:
-        verbose_name_plural = 'supplies'
+        verbose_name_plural = "supplies"
diff --git a/example/cheeseshop/fields.py b/example/cheeseshop/fields.py
index e6fc8be..9c02923 100644
--- a/example/cheeseshop/fields.py
+++ b/example/cheeseshop/fields.py
@@ -13,7 +13,7 @@ class JsonField(fields.CharField):
 
     def widget_attrs(self, widget: widgets.Widget):
         attrs = super().widget_attrs(widget)
-        attrs['rows'] = self.rows
+        attrs["rows"] = self.rows
         return attrs
 
     def to_python(self, value):
diff --git a/example/cheeseshop/settings.py b/example/cheeseshop/settings.py
index 75bc6b2..44fdbed 100644
--- a/example/cheeseshop/settings.py
+++ b/example/cheeseshop/settings.py
@@ -21,7 +21,7 @@ BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 SITE_ID = 1
 
 # SECURITY WARNING: keep the secret key used in production secret!
-SECRET_KEY = 'hdx64#m+lnc_0ffoyehbk&7gk1&*9uar$pcfcm-%$km#p0$k=6'
+SECRET_KEY = "hdx64#m+lnc_0ffoyehbk&7gk1&*9uar$pcfcm-%$km#p0$k=6"
 
 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = True
@@ -32,122 +32,122 @@ ALLOWED_HOSTS = []
 # Application definition
 
 INSTALLED_APPS = (
-    'django.contrib.admin',
-    'django.contrib.auth',
-    'django.contrib.contenttypes',
-    'django.contrib.sessions',
-    'django.contrib.sites',
-    'django.contrib.messages',
-    'django.contrib.staticfiles',
-    'cheeseshop.apps.catalog',
-    'cheeseshop.apps.storage',
-    'constance',
+    "django.contrib.admin",
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
+    "django.contrib.sessions",
+    "django.contrib.sites",
+    "django.contrib.messages",
+    "django.contrib.staticfiles",
+    "cheeseshop.apps.catalog",
+    "cheeseshop.apps.storage",
+    "constance",
 )
 
 MIDDLEWARE = (
-    'django.middleware.common.CommonMiddleware',
-    'django.contrib.sessions.middleware.SessionMiddleware',
-    'django.middleware.csrf.CsrfViewMiddleware',
-    'django.contrib.auth.middleware.AuthenticationMiddleware',
-    'django.contrib.messages.middleware.MessageMiddleware',
+    "django.middleware.common.CommonMiddleware",
+    "django.contrib.sessions.middleware.SessionMiddleware",
+    "django.middleware.csrf.CsrfViewMiddleware",
+    "django.contrib.auth.middleware.AuthenticationMiddleware",
+    "django.contrib.messages.middleware.MessageMiddleware",
 )
 
-ROOT_URLCONF = 'cheeseshop.urls'
+ROOT_URLCONF = "cheeseshop.urls"
 
 TEMPLATES = [
     {
-        'BACKEND': 'django.template.backends.django.DjangoTemplates',
-        'DIRS': [],
-        'APP_DIRS': True,
-        'OPTIONS': {
-            'context_processors': [
-                'django.template.context_processors.debug',
-                'django.template.context_processors.request',
-                'django.contrib.auth.context_processors.auth',
-                'django.contrib.messages.context_processors.messages',
+        "BACKEND": "django.template.backends.django.DjangoTemplates",
+        "DIRS": [],
+        "APP_DIRS": True,
+        "OPTIONS": {
+            "context_processors": [
+                "django.template.context_processors.debug",
+                "django.template.context_processors.request",
+                "django.contrib.auth.context_processors.auth",
+                "django.contrib.messages.context_processors.messages",
             ],
         },
     },
 ]
 
-WSGI_APPLICATION = 'cheeseshop.wsgi.application'
+WSGI_APPLICATION = "cheeseshop.wsgi.application"
 
 
 # Database
 # https://docs.djangoproject.com/en/4.1/ref/settings/#databases
 
 DATABASES = {
-    'default': {
-        'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': '/tmp/cheeseshop.db',
+    "default": {
+        "ENGINE": "django.db.backends.sqlite3",
+        "NAME": "/tmp/cheeseshop.db",
     }
 }
 
 CONSTANCE_REDIS_CONNECTION = {
-    'host': 'localhost',
-    'port': 6379,
-    'db': 0,
+    "host": "localhost",
+    "port": 6379,
+    "db": 0,
 }
 
 CONSTANCE_ADDITIONAL_FIELDS = {
-    'yes_no_null_select': [
-        'django.forms.fields.ChoiceField',
-        {'widget': 'django.forms.Select', 'choices': ((None, '-----'), ('yes', 'Yes'), ('no', 'No'))},
+    "yes_no_null_select": [
+        "django.forms.fields.ChoiceField",
+        {"widget": "django.forms.Select", "choices": ((None, "-----"), ("yes", "Yes"), ("no", "No"))},
     ],
-    'email': ('django.forms.fields.EmailField',),
-    'json_field': ['cheeseshop.fields.JsonField'],
-    'image_field': ['django.forms.ImageField', {}],
+    "email": ("django.forms.fields.EmailField",),
+    "json_field": ["cheeseshop.fields.JsonField"],
+    "image_field": ["django.forms.ImageField", {}],
 }
 
 CONSTANCE_CONFIG = {
-    'BANNER': ('The National Cheese Emporium', 'name of the shop'),
-    'OWNER': ('Mr. Henry Wensleydale', 'owner of the shop'),
-    'OWNER_EMAIL': ('henry@example.com', 'contact email for owner', 'email'),
-    'MUSICIANS': (4, 'number of musicians inside the shop'),
-    'DATE_ESTABLISHED': (date(1972, 11, 30), "the shop's first opening"),
-    'MY_SELECT_KEY': ('yes', 'select yes or no', 'yes_no_null_select'),
-    'MULTILINE': ('Line one\nLine two', 'multiline string'),
-    'JSON_DATA': (
-        {'a': 1_000, 'b': 'test', 'max': 30_000_000},
-        'Some test data for json',
-        'json_field',
+    "BANNER": ("The National Cheese Emporium", "name of the shop"),
+    "OWNER": ("Mr. Henry Wensleydale", "owner of the shop"),
+    "OWNER_EMAIL": ("henry@example.com", "contact email for owner", "email"),
+    "MUSICIANS": (4, "number of musicians inside the shop"),
+    "DATE_ESTABLISHED": (date(1972, 11, 30), "the shop's first opening"),
+    "MY_SELECT_KEY": ("yes", "select yes or no", "yes_no_null_select"),
+    "MULTILINE": ("Line one\nLine two", "multiline string"),
+    "JSON_DATA": (
+        {"a": 1_000, "b": "test", "max": 30_000_000},
+        "Some test data for json",
+        "json_field",
     ),
-    'LOGO': (
-        '',
-        'Logo image file',
-        'image_field',
+    "LOGO": (
+        "",
+        "Logo image file",
+        "image_field",
     ),
 }
 
 CONSTANCE_CONFIG_FIELDSETS = {
-    'Cheese shop general info': [
-        'BANNER',
-        'OWNER',
-        'OWNER_EMAIL',
-        'MUSICIANS',
-        'DATE_ESTABLISHED',
-        'LOGO',
+    "Cheese shop general info": [
+        "BANNER",
+        "OWNER",
+        "OWNER_EMAIL",
+        "MUSICIANS",
+        "DATE_ESTABLISHED",
+        "LOGO",
     ],
-    'Awkward test settings': ['MY_SELECT_KEY', 'MULTILINE', 'JSON_DATA'],
+    "Awkward test settings": ["MY_SELECT_KEY", "MULTILINE", "JSON_DATA"],
 }
 
-CONSTANCE_BACKEND = 'constance.backends.database.DatabaseBackend'
+CONSTANCE_BACKEND = "constance.backends.database.DatabaseBackend"
 
 
 CACHES = {
-    'default': {
-        'BACKEND': 'django.core.cache.backends.memcached.PyMemcacheCache',
-        'LOCATION': '127.0.0.1:11211',
+    "default": {
+        "BACKEND": "django.core.cache.backends.memcached.PyMemcacheCache",
+        "LOCATION": "127.0.0.1:11211",
     }
 }
-CONSTANCE_DATABASE_CACHE_BACKEND = 'default'
+CONSTANCE_DATABASE_CACHE_BACKEND = "default"
 
 # Internationalization
 # https://docs.djangoproject.com/en/4.1/topics/i18n/
 
-LANGUAGE_CODE = 'en-us'
+LANGUAGE_CODE = "en-us"
 
-TIME_ZONE = 'America/Chicago'
+TIME_ZONE = "America/Chicago"
 
 USE_I18N = True
 
@@ -159,12 +159,12 @@ USE_TZ = True
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/4.1/howto/static-files/
 
-STATIC_URL = '/static/'
+STATIC_URL = "/static/"
 
-MEDIA_URL = '/media/'
+MEDIA_URL = "/media/"
 
-MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
+MEDIA_ROOT = os.path.join(BASE_DIR, "media")
 
-CONSTANCE_FILE_ROOT = 'constance'
+CONSTANCE_FILE_ROOT = "constance"
 
-DEFAULT_AUTO_FIELD = 'django.db.models.AutoField'
+DEFAULT_AUTO_FIELD = "django.db.models.AutoField"
diff --git a/example/cheeseshop/urls.py b/example/cheeseshop/urls.py
index 7b68c4b..6ffc7b0 100644
--- a/example/cheeseshop/urls.py
+++ b/example/cheeseshop/urls.py
@@ -6,7 +6,7 @@ from django.urls import re_path
 admin.autodiscover()
 
 urlpatterns = [
-    re_path('admin/', admin.site.urls),
+    re_path("admin/", admin.site.urls),
 ]
 
 if settings.DEBUG:
diff --git a/example/cheeseshop/wsgi.py b/example/cheeseshop/wsgi.py
index ce3dc33..96a17c4 100644
--- a/example/cheeseshop/wsgi.py
+++ b/example/cheeseshop/wsgi.py
@@ -2,6 +2,6 @@ import os
 
 from django.core.wsgi import get_wsgi_application
 
-os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'cheeseshop.settings')
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "cheeseshop.settings")
 
 application = get_wsgi_application()
diff --git a/example/manage.py b/example/manage.py
index 81f8fe5..0ea7766 100755
--- a/example/manage.py
+++ b/example/manage.py
@@ -2,8 +2,8 @@
 import os
 import sys
 
-if __name__ == '__main__':
-    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'cheeseshop.settings')
+if __name__ == "__main__":
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "cheeseshop.settings")
 
     from django.core.management import execute_from_command_line
 
diff --git a/pyproject.toml b/pyproject.toml
index 4238492..cc8effa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,7 +64,6 @@ line-length = 120
 indent-width = 4
 
 [tool.ruff.format]
-quote-style = "single"
 indent-style = "space"
 skip-magic-trailing-comma = false
 line-ending = "auto"
diff --git a/tests/backends/test_database.py b/tests/backends/test_database.py
index 16220a2..0401e65 100644
--- a/tests/backends/test_database.py
+++ b/tests/backends/test_database.py
@@ -7,7 +7,7 @@ from tests.storage import StorageTestsMixin
 class TestDatabase(StorageTestsMixin, TestCase):
     def setUp(self):
         self.old_backend = settings.BACKEND
-        settings.BACKEND = 'constance.backends.database.DatabaseBackend'
+        settings.BACKEND = "constance.backends.database.DatabaseBackend"
         super().setUp()
 
     def test_database_queries(self):
diff --git a/tests/backends/test_memory.py b/tests/backends/test_memory.py
index 6873556..0895c36 100644
--- a/tests/backends/test_memory.py
+++ b/tests/backends/test_memory.py
@@ -7,7 +7,7 @@ from tests.storage import StorageTestsMixin
 class TestMemory(StorageTestsMixin, TestCase):
     def setUp(self):
         self.old_backend = settings.BACKEND
-        settings.BACKEND = 'constance.backends.memory.MemoryBackend'
+        settings.BACKEND = "constance.backends.memory.MemoryBackend"
         super().setUp()
         self.config._backend._storage = {}
 
diff --git a/tests/backends/test_redis.py b/tests/backends/test_redis.py
index 3d9426d..578fc83 100644
--- a/tests/backends/test_redis.py
+++ b/tests/backends/test_redis.py
@@ -5,7 +5,7 @@ from tests.storage import StorageTestsMixin
 
 
 class TestRedis(StorageTestsMixin, TestCase):
-    _BACKEND = 'constance.backends.redisd.RedisBackend'
+    _BACKEND = "constance.backends.redisd.RedisBackend"
 
     def setUp(self):
         self.old_backend = settings.BACKEND
@@ -19,4 +19,4 @@ class TestRedis(StorageTestsMixin, TestCase):
 
 
 class TestCachingRedis(TestRedis):
-    _BACKEND = 'constance.backends.redisd.CachingRedisBackend'
+    _BACKEND = "constance.backends.redisd.CachingRedisBackend"
diff --git a/tests/settings.py b/tests/settings.py
index 2b5b7e0..61656ab 100644
--- a/tests/settings.py
+++ b/tests/settings.py
@@ -4,107 +4,107 @@ from datetime import time
 from datetime import timedelta
 from decimal import Decimal
 
-SECRET_KEY = 'cheese'
+SECRET_KEY = "cheese"
 
 MIDDLEWARE = (
-    'django.contrib.sessions.middleware.SessionMiddleware',
-    'django.middleware.common.CommonMiddleware',
-    'django.middleware.csrf.CsrfViewMiddleware',
-    'django.contrib.auth.middleware.AuthenticationMiddleware',
-    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
-    'django.contrib.messages.middleware.MessageMiddleware',
-    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+    "django.contrib.sessions.middleware.SessionMiddleware",
+    "django.middleware.common.CommonMiddleware",
+    "django.middleware.csrf.CsrfViewMiddleware",
+    "django.contrib.auth.middleware.AuthenticationMiddleware",
+    "django.contrib.auth.middleware.SessionAuthenticationMiddleware",
+    "django.contrib.messages.middleware.MessageMiddleware",
+    "django.middleware.clickjacking.XFrameOptionsMiddleware",
 )
 
-DATABASE_ENGINE = 'sqlite3'
+DATABASE_ENGINE = "sqlite3"
 
 DATABASES = {
-    'default': {
-        'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': ':memory:',
+    "default": {
+        "ENGINE": "django.db.backends.sqlite3",
+        "NAME": ":memory:",
     },
-    'secondary': {
-        'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': ':memory:',
+    "secondary": {
+        "ENGINE": "django.db.backends.sqlite3",
+        "NAME": ":memory:",
     },
 }
 
 INSTALLED_APPS = (
-    'django.contrib.admin',
-    'django.contrib.staticfiles',
-    'django.contrib.auth',
-    'django.contrib.contenttypes',
-    'django.contrib.sessions',
-    'django.contrib.messages',
-    'constance',
-    'constance.backends.database',
+    "django.contrib.admin",
+    "django.contrib.staticfiles",
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
+    "django.contrib.sessions",
+    "django.contrib.messages",
+    "constance",
+    "constance.backends.database",
 )
 
-ROOT_URLCONF = 'tests.urls'
+ROOT_URLCONF = "tests.urls"
 
-CONSTANCE_REDIS_CONNECTION_CLASS = 'tests.redis_mockup.Connection'
+CONSTANCE_REDIS_CONNECTION_CLASS = "tests.redis_mockup.Connection"
 
 CONSTANCE_ADDITIONAL_FIELDS = {
-    'yes_no_null_select': [
-        'django.forms.fields.ChoiceField',
-        {'widget': 'django.forms.Select', 'choices': ((None, '-----'), ('yes', 'Yes'), ('no', 'No'))},
+    "yes_no_null_select": [
+        "django.forms.fields.ChoiceField",
+        {"widget": "django.forms.Select", "choices": ((None, "-----"), ("yes", "Yes"), ("no", "No"))},
     ],
     # note this intentionally uses a tuple so that we can test immutable
-    'email': ('django.forms.fields.EmailField',),
-    'array': ['django.forms.fields.CharField', {'widget': 'django.forms.Textarea'}],
-    'json': ['django.forms.fields.CharField', {'widget': 'django.forms.Textarea'}],
+    "email": ("django.forms.fields.EmailField",),
+    "array": ["django.forms.fields.CharField", {"widget": "django.forms.Textarea"}],
+    "json": ["django.forms.fields.CharField", {"widget": "django.forms.Textarea"}],
 }
 
 USE_TZ = True
 
 CONSTANCE_CONFIG = {
-    'INT_VALUE': (1, 'some int'),
-    'BOOL_VALUE': (True, 'true or false'),
-    'STRING_VALUE': ('Hello world', 'greetings'),
-    'DECIMAL_VALUE': (Decimal('0.1'), 'the first release version'),
-    'DATETIME_VALUE': (datetime(2010, 8, 23, 11, 29, 24), 'time of the first commit'),
-    'FLOAT_VALUE': (3.1415926536, 'PI'),
-    'DATE_VALUE': (date(2010, 12, 24), 'Merry Chrismas'),
-    'TIME_VALUE': (time(23, 59, 59), 'And happy New Year'),
-    'TIMEDELTA_VALUE': (timedelta(days=1, hours=2, minutes=3), 'Interval'),
-    'CHOICE_VALUE': ('yes', 'select yes or no', 'yes_no_null_select'),
-    'LINEBREAK_VALUE': ('Spam spam', 'eggs\neggs'),
-    'EMAIL_VALUE': ('test@example.com', 'An email', 'email'),
-    'LIST_VALUE': ([1, '1', date(2019, 1, 1)], 'A list', 'array'),
-    'JSON_VALUE': (
+    "INT_VALUE": (1, "some int"),
+    "BOOL_VALUE": (True, "true or false"),
+    "STRING_VALUE": ("Hello world", "greetings"),
+    "DECIMAL_VALUE": (Decimal("0.1"), "the first release version"),
+    "DATETIME_VALUE": (datetime(2010, 8, 23, 11, 29, 24), "time of the first commit"),
+    "FLOAT_VALUE": (3.1415926536, "PI"),
+    "DATE_VALUE": (date(2010, 12, 24), "Merry Chrismas"),
+    "TIME_VALUE": (time(23, 59, 59), "And happy New Year"),
+    "TIMEDELTA_VALUE": (timedelta(days=1, hours=2, minutes=3), "Interval"),
+    "CHOICE_VALUE": ("yes", "select yes or no", "yes_no_null_select"),
+    "LINEBREAK_VALUE": ("Spam spam", "eggs\neggs"),
+    "EMAIL_VALUE": ("test@example.com", "An email", "email"),
+    "LIST_VALUE": ([1, "1", date(2019, 1, 1)], "A list", "array"),
+    "JSON_VALUE": (
         {
-            'key': 'value',
-            'key2': 2,
-            'key3': [1, 2, 3],
-            'key4': {'key': 'value'},
-            'key5': date(2019, 1, 1),
-            'key6': None,
+            "key": "value",
+            "key2": 2,
+            "key3": [1, 2, 3],
+            "key4": {"key": "value"},
+            "key5": date(2019, 1, 1),
+            "key6": None,
         },
-        'A JSON object',
-        'json',
+        "A JSON object",
+        "json",
     ),
 }
 
 DEBUG = True
 
-STATIC_ROOT = './static/'
+STATIC_ROOT = "./static/"
 
-STATIC_URL = '/static/'
+STATIC_URL = "/static/"
 
 TEMPLATES = [
     {
-        'BACKEND': 'django.template.backends.django.DjangoTemplates',
-        'DIRS': [],
-        'APP_DIRS': True,
-        'OPTIONS': {
-            'context_processors': [
-                'django.template.context_processors.debug',
-                'django.template.context_processors.i18n',
-                'django.template.context_processors.request',
-                'django.template.context_processors.static',
-                'django.contrib.auth.context_processors.auth',
-                'django.contrib.messages.context_processors.messages',
-                'constance.context_processors.config',
+        "BACKEND": "django.template.backends.django.DjangoTemplates",
+        "DIRS": [],
+        "APP_DIRS": True,
+        "OPTIONS": {
+            "context_processors": [
+                "django.template.context_processors.debug",
+                "django.template.context_processors.i18n",
+                "django.template.context_processors.request",
+                "django.template.context_processors.static",
+                "django.contrib.auth.context_processors.auth",
+                "django.contrib.messages.context_processors.messages",
+                "constance.context_processors.config",
             ],
         },
     },
diff --git a/tests/storage.py b/tests/storage.py
index 13e7e99..932f252 100644
--- a/tests/storage.py
+++ b/tests/storage.py
@@ -16,60 +16,60 @@ class StorageTestsMixin:
     def test_store(self):
         self.assertEqual(self.config.INT_VALUE, 1)
         self.assertEqual(self.config.BOOL_VALUE, True)
-        self.assertEqual(self.config.STRING_VALUE, 'Hello world')
-        self.assertEqual(self.config.DECIMAL_VALUE, Decimal('0.1'))
+        self.assertEqual(self.config.STRING_VALUE, "Hello world")
+        self.assertEqual(self.config.DECIMAL_VALUE, Decimal("0.1"))
         self.assertEqual(self.config.DATETIME_VALUE, datetime(2010, 8, 23, 11, 29, 24))
         self.assertEqual(self.config.FLOAT_VALUE, 3.1415926536)
         self.assertEqual(self.config.DATE_VALUE, date(2010, 12, 24))
         self.assertEqual(self.config.TIME_VALUE, time(23, 59, 59))
         self.assertEqual(self.config.TIMEDELTA_VALUE, timedelta(days=1, hours=2, minutes=3))
-        self.assertEqual(self.config.CHOICE_VALUE, 'yes')
-        self.assertEqual(self.config.EMAIL_VALUE, 'test@example.com')
-        self.assertEqual(self.config.LIST_VALUE, [1, '1', date(2019, 1, 1)])
+        self.assertEqual(self.config.CHOICE_VALUE, "yes")
+        self.assertEqual(self.config.EMAIL_VALUE, "test@example.com")
+        self.assertEqual(self.config.LIST_VALUE, [1, "1", date(2019, 1, 1)])
         self.assertEqual(
             self.config.JSON_VALUE,
             {
-                'key': 'value',
-                'key2': 2,
-                'key3': [1, 2, 3],
-                'key4': {'key': 'value'},
-                'key5': date(2019, 1, 1),
-                'key6': None,
+                "key": "value",
+                "key2": 2,
+                "key3": [1, 2, 3],
+                "key4": {"key": "value"},
+                "key5": date(2019, 1, 1),
+                "key6": None,
             },
         )
 
         # set values
         self.config.INT_VALUE = 100
         self.config.BOOL_VALUE = False
-        self.config.STRING_VALUE = 'Beware the weeping angel'
-        self.config.DECIMAL_VALUE = Decimal('1.2')
+        self.config.STRING_VALUE = "Beware the weeping angel"
+        self.config.DECIMAL_VALUE = Decimal("1.2")
         self.config.DATETIME_VALUE = datetime(1977, 10, 2)
         self.config.FLOAT_VALUE = 2.718281845905
         self.config.DATE_VALUE = date(2001, 12, 20)
         self.config.TIME_VALUE = time(1, 59, 0)
         self.config.TIMEDELTA_VALUE = timedelta(days=2, hours=3, minutes=4)
-        self.config.CHOICE_VALUE = 'no'
-        self.config.EMAIL_VALUE = 'foo@bar.com'
+        self.config.CHOICE_VALUE = "no"
+        self.config.EMAIL_VALUE = "foo@bar.com"
         self.config.LIST_VALUE = [1, date(2020, 2, 2)]
-        self.config.JSON_VALUE = {'key': 'OK'}
+        self.config.JSON_VALUE = {"key": "OK"}
 
         # read again
         self.assertEqual(self.config.INT_VALUE, 100)
         self.assertEqual(self.config.BOOL_VALUE, False)
-        self.assertEqual(self.config.STRING_VALUE, 'Beware the weeping angel')
-        self.assertEqual(self.config.DECIMAL_VALUE, Decimal('1.2'))
+        self.assertEqual(self.config.STRING_VALUE, "Beware the weeping angel")
+        self.assertEqual(self.config.DECIMAL_VALUE, Decimal("1.2"))
         self.assertEqual(self.config.DATETIME_VALUE, datetime(1977, 10, 2))
         self.assertEqual(self.config.FLOAT_VALUE, 2.718281845905)
         self.assertEqual(self.config.DATE_VALUE, date(2001, 12, 20))
         self.assertEqual(self.config.TIME_VALUE, time(1, 59, 0))
         self.assertEqual(self.config.TIMEDELTA_VALUE, timedelta(days=2, hours=3, minutes=4))
-        self.assertEqual(self.config.CHOICE_VALUE, 'no')
-        self.assertEqual(self.config.EMAIL_VALUE, 'foo@bar.com')
+        self.assertEqual(self.config.CHOICE_VALUE, "no")
+        self.assertEqual(self.config.EMAIL_VALUE, "foo@bar.com")
         self.assertEqual(self.config.LIST_VALUE, [1, date(2020, 2, 2)])
-        self.assertEqual(self.config.JSON_VALUE, {'key': 'OK'})
+        self.assertEqual(self.config.JSON_VALUE, {"key": "OK"})
 
     def test_nonexistent(self):
-        self.assertRaises(AttributeError, getattr, self.config, 'NON_EXISTENT')
+        self.assertRaises(AttributeError, getattr, self.config, "NON_EXISTENT")
 
         with self.assertRaises(AttributeError):
             self.config.NON_EXISTENT = 1
@@ -77,15 +77,15 @@ class StorageTestsMixin:
     def test_missing_values(self):
         # set some values and leave out others
         self.config.BOOL_VALUE = False
-        self.config.DECIMAL_VALUE = Decimal('1.2')
+        self.config.DECIMAL_VALUE = Decimal("1.2")
         self.config.DATETIME_VALUE = datetime(1977, 10, 2)
         self.config.DATE_VALUE = date(2001, 12, 20)
         self.config.TIME_VALUE = time(1, 59, 0)
 
         self.assertEqual(self.config.INT_VALUE, 1)  # this should be the default value
         self.assertEqual(self.config.BOOL_VALUE, False)
-        self.assertEqual(self.config.STRING_VALUE, 'Hello world')  # this should be the default value
-        self.assertEqual(self.config.DECIMAL_VALUE, Decimal('1.2'))
+        self.assertEqual(self.config.STRING_VALUE, "Hello world")  # this should be the default value
+        self.assertEqual(self.config.DECIMAL_VALUE, Decimal("1.2"))
         self.assertEqual(self.config.DATETIME_VALUE, datetime(1977, 10, 2))
         self.assertEqual(self.config.FLOAT_VALUE, 3.1415926536)  # this should be the default value
         self.assertEqual(self.config.DATE_VALUE, date(2001, 12, 20))
@@ -96,12 +96,12 @@ class StorageTestsMixin:
         # Check corner cases such as falsy values
         self.config.INT_VALUE = 0
         self.config.BOOL_VALUE = False
-        self.config.STRING_VALUE = ''
+        self.config.STRING_VALUE = ""
 
         values = dict(self.config._backend.mget(settings.CONFIG))
-        self.assertEqual(values['INT_VALUE'], 0)
-        self.assertEqual(values['BOOL_VALUE'], False)
-        self.assertEqual(values['STRING_VALUE'], '')
+        self.assertEqual(values["INT_VALUE"], 0)
+        self.assertEqual(values["BOOL_VALUE"], False)
+        self.assertEqual(values["STRING_VALUE"], "")
 
     def test_backend_does_not_return_none_values(self):
         result = dict(self.config._backend.mget(settings.CONFIG))
diff --git a/tests/test_admin.py b/tests/test_admin.py
index 91e6b6c..86666e3 100644
--- a/tests/test_admin.py
+++ b/tests/test_admin.py
@@ -23,196 +23,196 @@ class TestAdmin(TestCase):
     def setUp(self):
         super().setUp()
         self.rf = RequestFactory()
-        self.superuser = User.objects.create_superuser('admin', 'nimda', 'a@a.cz')
-        self.normaluser = User.objects.create_user('normal', 'nimda', 'b@b.cz')
+        self.superuser = User.objects.create_superuser("admin", "nimda", "a@a.cz")
+        self.normaluser = User.objects.create_user("normal", "nimda", "b@b.cz")
         self.normaluser.is_staff = True
         self.normaluser.save()
         self.options = admin.site._registry[self.model]
 
     def test_changelist(self):
-        self.client.login(username='admin', password='nimda')
-        request = self.rf.get('/admin/constance/config/')
+        self.client.login(username="admin", password="nimda")
+        request = self.rf.get("/admin/constance/config/")
         request.user = self.superuser
         response = self.options.changelist_view(request, {})
         self.assertEqual(response.status_code, 200)
 
     def test_custom_auth(self):
         settings.SUPERUSER_ONLY = False
-        self.client.login(username='normal', password='nimda')
-        request = self.rf.get('/admin/constance/config/')
+        self.client.login(username="normal", password="nimda")
+        request = self.rf.get("/admin/constance/config/")
         request.user = self.normaluser
         self.assertRaises(PermissionDenied, self.options.changelist_view, request, {})
-        self.assertFalse(request.user.has_perm('constance.change_config'))
+        self.assertFalse(request.user.has_perm("constance.change_config"))
 
         # reload user to reset permission cache
-        request = self.rf.get('/admin/constance/config/')
+        request = self.rf.get("/admin/constance/config/")
         request.user = User.objects.get(pk=self.normaluser.pk)
 
-        request.user.user_permissions.add(Permission.objects.get(codename='change_config'))
-        self.assertTrue(request.user.has_perm('constance.change_config'))
+        request.user.user_permissions.add(Permission.objects.get(codename="change_config"))
+        self.assertTrue(request.user.has_perm("constance.change_config"))
 
         response = self.options.changelist_view(request, {})
         self.assertEqual(response.status_code, 200)
 
     def test_linebreaks(self):
-        self.client.login(username='admin', password='nimda')
-        request = self.rf.get('/admin/constance/config/')
+        self.client.login(username="admin", password="nimda")
+        request = self.rf.get("/admin/constance/config/")
         request.user = self.superuser
         response = self.options.changelist_view(request, {})
-        self.assertContains(response, 'LINEBREAK_VALUE')
-        self.assertContains(response, linebreaksbr('eggs\neggs'))
+        self.assertContains(response, "LINEBREAK_VALUE")
+        self.assertContains(response, linebreaksbr("eggs\neggs"))
 
     @mock.patch(
-        'constance.settings.CONFIG_FIELDSETS',
+        "constance.settings.CONFIG_FIELDSETS",
         {
-            'Numbers': ('INT_VALUE',),
-            'Text': ('STRING_VALUE',),
+            "Numbers": ("INT_VALUE",),
+            "Text": ("STRING_VALUE",),
         },
     )
     def test_fieldset_headers(self):
-        self.client.login(username='admin', password='nimda')
-        request = self.rf.get('/admin/constance/config/')
+        self.client.login(username="admin", password="nimda")
+        request = self.rf.get("/admin/constance/config/")
         request.user = self.superuser
         response = self.options.changelist_view(request, {})
-        self.assertContains(response, '<h2>Numbers</h2>')
-        self.assertContains(response, '<h2>Text</h2>')
+        self.assertContains(response, "<h2>Numbers</h2>")
+        self.assertContains(response, "<h2>Text</h2>")
 
     @mock.patch(
-        'constance.settings.CONFIG_FIELDSETS',
+        "constance.settings.CONFIG_FIELDSETS",
         (
-            ('Numbers', ('INT_VALUE',)),
-            ('Text', ('STRING_VALUE',)),
+            ("Numbers", ("INT_VALUE",)),
+            ("Text", ("STRING_VALUE",)),
         ),
     )
     def test_fieldset_tuple(self):
-        self.client.login(username='admin', password='nimda')
-        request = self.rf.get('/admin/constance/config/')
+        self.client.login(username="admin", password="nimda")
+        request = self.rf.get("/admin/constance/config/")
         request.user = self.superuser
         response = self.options.changelist_view(request, {})
-        self.assertContains(response, '<h2>Numbers</h2>')
-        self.assertContains(response, '<h2>Text</h2>')
+        self.assertContains(response, "<h2>Numbers</h2>")
+        self.assertContains(response, "<h2>Text</h2>")
 
     @mock.patch(
-        'constance.settings.CONFIG_FIELDSETS',
+        "constance.settings.CONFIG_FIELDSETS",
         {
-            'Numbers': {
-                'fields': (
-                    'INT_VALUE',
-                    'DECIMAL_VALUE',
+            "Numbers": {
+                "fields": (
+                    "INT_VALUE",
+                    "DECIMAL_VALUE",
                 ),
-                'collapse': True,
+                "collapse": True,
             },
-            'Text': {
-                'fields': (
-                    'STRING_VALUE',
-                    'LINEBREAK_VALUE',
+            "Text": {
+                "fields": (
+                    "STRING_VALUE",
+                    "LINEBREAK_VALUE",
                 ),
-                'collapse': True,
+                "collapse": True,
             },
         },
     )
     def test_collapsed_fieldsets(self):
-        self.client.login(username='admin', password='nimda')
-        request = self.rf.get('/admin/constance/config/')
+        self.client.login(username="admin", password="nimda")
+        request = self.rf.get("/admin/constance/config/")
         request.user = self.superuser
         response = self.options.changelist_view(request, {})
-        self.assertContains(response, 'module collapse')
+        self.assertContains(response, "module collapse")
 
-    @mock.patch('constance.settings.CONFIG_FIELDSETS', {'FieldSetOne': ('INT_VALUE',)})
+    @mock.patch("constance.settings.CONFIG_FIELDSETS", {"FieldSetOne": ("INT_VALUE",)})
     @mock.patch(
-        'constance.settings.CONFIG',
+        "constance.settings.CONFIG",
         {
-            'INT_VALUE': (1, 'some int'),
+            "INT_VALUE": (1, "some int"),
         },
     )
-    @mock.patch('constance.settings.IGNORE_ADMIN_VERSION_CHECK', True)
-    @mock.patch('constance.forms.ConstanceForm.save', lambda _: None)
-    @mock.patch('constance.forms.ConstanceForm.is_valid', lambda _: True)
+    @mock.patch("constance.settings.IGNORE_ADMIN_VERSION_CHECK", True)
+    @mock.patch("constance.forms.ConstanceForm.save", lambda _: None)
+    @mock.patch("constance.forms.ConstanceForm.is_valid", lambda _: True)
     def test_submit(self):
         """
         Test that submitting the admin page results in an http redirect when
         everything is in order.
         """
-        initial_value = {'INT_VALUE': settings.CONFIG['INT_VALUE'][0]}
+        initial_value = {"INT_VALUE": settings.CONFIG["INT_VALUE"][0]}
 
-        self.client.login(username='admin', password='nimda')
+        self.client.login(username="admin", password="nimda")
 
         request = self.rf.post(
-            '/admin/constance/config/',
+            "/admin/constance/config/",
             data={
                 **initial_value,
-                'version': '123',
+                "version": "123",
             },
         )
 
         request.user = self.superuser
         request._dont_enforce_csrf_checks = True
 
-        with mock.patch('django.contrib.messages.add_message') as mock_message, mock.patch.object(
-            ConstanceForm, '__init__', **initial_value, return_value=None
+        with mock.patch("django.contrib.messages.add_message") as mock_message, mock.patch.object(
+            ConstanceForm, "__init__", **initial_value, return_value=None
         ) as mock_form:
             response = self.options.changelist_view(request, {})
             mock_form.assert_called_with(data=request.POST, files=request.FILES, initial=initial_value, request=request)
-            mock_message.assert_called_with(request, 25, _('Live settings updated successfully.'))
+            mock_message.assert_called_with(request, 25, _("Live settings updated successfully."))
 
         self.assertIsInstance(response, HttpResponseRedirect)
 
-    @mock.patch('constance.settings.CONFIG_FIELDSETS', {'FieldSetOne': ('MULTILINE',)})
+    @mock.patch("constance.settings.CONFIG_FIELDSETS", {"FieldSetOne": ("MULTILINE",)})
     @mock.patch(
-        'constance.settings.CONFIG',
+        "constance.settings.CONFIG",
         {
-            'MULTILINE': ('Hello\nWorld', 'multiline value'),
+            "MULTILINE": ("Hello\nWorld", "multiline value"),
         },
     )
-    @mock.patch('constance.settings.IGNORE_ADMIN_VERSION_CHECK', True)
+    @mock.patch("constance.settings.IGNORE_ADMIN_VERSION_CHECK", True)
     def test_newlines_normalization(self):
-        self.client.login(username='admin', password='nimda')
+        self.client.login(username="admin", password="nimda")
         request = self.rf.post(
-            '/admin/constance/config/',
+            "/admin/constance/config/",
             data={
-                'MULTILINE': 'Hello\r\nWorld',
-                'version': '123',
+                "MULTILINE": "Hello\r\nWorld",
+                "version": "123",
             },
         )
         request.user = self.superuser
         request._dont_enforce_csrf_checks = True
-        with mock.patch('django.contrib.messages.add_message'):
+        with mock.patch("django.contrib.messages.add_message"):
             response = self.options.changelist_view(request, {})
         self.assertIsInstance(response, HttpResponseRedirect)
-        self.assertEqual(get_values()['MULTILINE'], 'Hello\nWorld')
+        self.assertEqual(get_values()["MULTILINE"], "Hello\nWorld")
 
     @mock.patch(
-        'constance.settings.CONFIG',
+        "constance.settings.CONFIG",
         {
-            'DATETIME_VALUE': (datetime(2019, 8, 7, 18, 40, 0), 'some naive datetime'),
+            "DATETIME_VALUE": (datetime(2019, 8, 7, 18, 40, 0), "some naive datetime"),
         },
     )
-    @mock.patch('constance.settings.IGNORE_ADMIN_VERSION_CHECK', True)
-    @mock.patch('tests.redis_mockup.Connection.set', mock.MagicMock())
+    @mock.patch("constance.settings.IGNORE_ADMIN_VERSION_CHECK", True)
+    @mock.patch("tests.redis_mockup.Connection.set", mock.MagicMock())
     def test_submit_aware_datetime(self):
         """
         Test that submitting the admin page results in an http redirect when
         everything is in order.
         """
         request = self.rf.post(
-            '/admin/constance/config/',
+            "/admin/constance/config/",
             data={
-                'DATETIME_VALUE_0': '2019-08-07',
-                'DATETIME_VALUE_1': '19:17:01',
-                'version': '123',
+                "DATETIME_VALUE_0": "2019-08-07",
+                "DATETIME_VALUE_1": "19:17:01",
+                "version": "123",
             },
         )
         request.user = self.superuser
         request._dont_enforce_csrf_checks = True
-        with mock.patch('django.contrib.messages.add_message'):
+        with mock.patch("django.contrib.messages.add_message"):
             response = self.options.changelist_view(request, {})
         self.assertIsInstance(response, HttpResponseRedirect)
 
     @mock.patch(
-        'constance.settings.CONFIG_FIELDSETS',
+        "constance.settings.CONFIG_FIELDSETS",
         {
-            'Numbers': ('INT_VALUE',),
-            'Text': ('STRING_VALUE',),
+            "Numbers": ("INT_VALUE",),
+            "Text": ("STRING_VALUE",),
         },
     )
     def test_inconsistent_fieldset_submit(self):
@@ -220,51 +220,51 @@ class TestAdmin(TestCase):
         Test that the admin page warns users if the CONFIG_FIELDSETS setting
         doesn't account for every field in CONFIG.
         """
-        self.client.login(username='admin', password='nimda')
-        request = self.rf.post('/admin/constance/config/', data=None)
+        self.client.login(username="admin", password="nimda")
+        request = self.rf.post("/admin/constance/config/", data=None)
         request.user = self.superuser
         request._dont_enforce_csrf_checks = True
-        with mock.patch('django.contrib.messages.add_message'):
+        with mock.patch("django.contrib.messages.add_message"):
             response = self.options.changelist_view(request, {})
-        self.assertContains(response, 'is missing field(s)')
+        self.assertContains(response, "is missing field(s)")
 
     @mock.patch(
-        'constance.settings.CONFIG_FIELDSETS',
+        "constance.settings.CONFIG_FIELDSETS",
         {
-            'Fieldsets': (
-                'STRING_VALUE',
-                'INT_VALUE',
+            "Fieldsets": (
+                "STRING_VALUE",
+                "INT_VALUE",
             ),
         },
     )
     def test_fieldset_ordering_1(self):
         """Ordering of inner list should be preserved."""
-        self.client.login(username='admin', password='nimda')
-        request = self.rf.get('/admin/constance/config/')
+        self.client.login(username="admin", password="nimda")
+        request = self.rf.get("/admin/constance/config/")
         request.user = self.superuser
         response = self.options.changelist_view(request, {})
         response.render()
         content_str = response.content.decode()
-        self.assertGreater(content_str.find('INT_VALUE'), content_str.find('STRING_VALUE'))
+        self.assertGreater(content_str.find("INT_VALUE"), content_str.find("STRING_VALUE"))
 
     @mock.patch(
-        'constance.settings.CONFIG_FIELDSETS',
+        "constance.settings.CONFIG_FIELDSETS",
         {
-            'Fieldsets': (
-                'INT_VALUE',
-                'STRING_VALUE',
+            "Fieldsets": (
+                "INT_VALUE",
+                "STRING_VALUE",
             ),
         },
     )
     def test_fieldset_ordering_2(self):
         """Ordering of inner list should be preserved."""
-        self.client.login(username='admin', password='nimda')
-        request = self.rf.get('/admin/constance/config/')
+        self.client.login(username="admin", password="nimda")
+        request = self.rf.get("/admin/constance/config/")
         request.user = self.superuser
         response = self.options.changelist_view(request, {})
         response.render()
         content_str = response.content.decode()
-        self.assertGreater(content_str.find('STRING_VALUE'), content_str.find('INT_VALUE'))
+        self.assertGreater(content_str.find("STRING_VALUE"), content_str.find("INT_VALUE"))
 
     def test_labels(self):
         self.assertEqual(type(self.model._meta.label), str)
diff --git a/tests/test_checks.py b/tests/test_checks.py
index 7880dfe..5bb98fb 100644
--- a/tests/test_checks.py
+++ b/tests/test_checks.py
@@ -8,7 +8,7 @@ from constance.checks import get_inconsistent_fieldnames
 
 
 class ChecksTestCase(TestCase):
-    @mock.patch('constance.settings.CONFIG_FIELDSETS', {'Set1': settings.CONFIG.keys()})
+    @mock.patch("constance.settings.CONFIG_FIELDSETS", {"Set1": settings.CONFIG.keys()})
     def test_get_inconsistent_fieldnames_none(self):
         """
         Test that get_inconsistent_fieldnames returns an empty data and no checks fail
@@ -19,8 +19,8 @@ class ChecksTestCase(TestCase):
         self.assertFalse(extra_keys)
 
     @mock.patch(
-        'constance.settings.CONFIG_FIELDSETS',
-        {'Set1': list(settings.CONFIG.keys())[:-1]},
+        "constance.settings.CONFIG_FIELDSETS",
+        {"Set1": list(settings.CONFIG.keys())[:-1]},
     )
     def test_get_inconsistent_fieldnames_for_missing_keys(self):
         """
@@ -33,8 +33,8 @@ class ChecksTestCase(TestCase):
         self.assertEqual(1, len(check_fieldsets()))
 
     @mock.patch(
-        'constance.settings.CONFIG_FIELDSETS',
-        {'Set1': [*settings.CONFIG.keys(), 'FORGOTTEN_KEY']},
+        "constance.settings.CONFIG_FIELDSETS",
+        {"Set1": [*settings.CONFIG.keys(), "FORGOTTEN_KEY"]},
     )
     def test_get_inconsistent_fieldnames_for_extra_keys(self):
         """
@@ -46,7 +46,7 @@ class ChecksTestCase(TestCase):
         self.assertTrue(extra_keys)
         self.assertEqual(1, len(check_fieldsets()))
 
-    @mock.patch('constance.settings.CONFIG_FIELDSETS', {})
+    @mock.patch("constance.settings.CONFIG_FIELDSETS", {})
     def test_check_fieldsets(self):
         """check_fieldsets should not output warning if CONFIG_FIELDSETS is not defined."""
         del settings.CONFIG_FIELDSETS
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 68d8daf..d9083b1 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -20,10 +20,10 @@ class CliTestCase(TransactionTestCase):
 
     def test_help(self):
         with contextlib.suppress(SystemExit):
-            call_command('constance', '--help')
+            call_command("constance", "--help")
 
     def test_list(self):
-        call_command('constance', 'list', stdout=self.out)
+        call_command("constance", "list", stdout=self.out)
 
         self.assertEqual(
             set(self.out.getvalue().splitlines()),
@@ -51,16 +51,16 @@ class CliTestCase(TransactionTestCase):
         )
 
     def test_get(self):
-        call_command('constance', *('get EMAIL_VALUE'.split()), stdout=self.out)
+        call_command("constance", *("get EMAIL_VALUE".split()), stdout=self.out)
 
-        self.assertEqual(self.out.getvalue().strip(), 'test@example.com')
+        self.assertEqual(self.out.getvalue().strip(), "test@example.com")
 
     def test_set(self):
-        call_command('constance', *('set EMAIL_VALUE blah@example.com'.split()), stdout=self.out)
+        call_command("constance", *("set EMAIL_VALUE blah@example.com".split()), stdout=self.out)
 
-        self.assertEqual(config.EMAIL_VALUE, 'blah@example.com')
+        self.assertEqual(config.EMAIL_VALUE, "blah@example.com")
 
-        call_command('constance', *('set', 'DATETIME_VALUE', '2011-09-24', '12:30:25'), stdout=self.out)
+        call_command("constance", *("set", "DATETIME_VALUE", "2011-09-24", "12:30:25"), stdout=self.out)
 
         expected = datetime(2011, 9, 24, 12, 30, 25)
         if settings.USE_TZ:
@@ -70,50 +70,50 @@ class CliTestCase(TransactionTestCase):
     def test_get_invalid_name(self):
         self.assertRaisesMessage(
             CommandError,
-            'NOT_A_REAL_CONFIG is not defined in settings.CONSTANCE_CONFIG',
+            "NOT_A_REAL_CONFIG is not defined in settings.CONSTANCE_CONFIG",
             call_command,
-            'constance',
-            'get',
-            'NOT_A_REAL_CONFIG',
+            "constance",
+            "get",
+            "NOT_A_REAL_CONFIG",
         )
 
     def test_set_invalid_name(self):
         self.assertRaisesMessage(
             CommandError,
-            'NOT_A_REAL_CONFIG is not defined in settings.CONSTANCE_CONFIG',
+            "NOT_A_REAL_CONFIG is not defined in settings.CONSTANCE_CONFIG",
             call_command,
-            'constance',
-            'set',
-            'NOT_A_REAL_CONFIG',
-            'foo',
+            "constance",
+            "set",
+            "NOT_A_REAL_CONFIG",
+            "foo",
         )
 
     def test_set_invalid_value(self):
         self.assertRaisesMessage(
             CommandError,
-            'Enter a valid email address.',
+            "Enter a valid email address.",
             call_command,
-            'constance',
-            'set',
-            'EMAIL_VALUE',
-            'not a valid email',
+            "constance",
+            "set",
+            "EMAIL_VALUE",
+            "not a valid email",
         )
 
     def test_set_invalid_multi_value(self):
         self.assertRaisesMessage(
             CommandError,
-            'Enter a list of values.',
+            "Enter a list of values.",
             call_command,
-            'constance',
-            'set',
-            'DATETIME_VALUE',
-            '2011-09-24 12:30:25',
+            "constance",
+            "set",
+            "DATETIME_VALUE",
+            "2011-09-24 12:30:25",
         )
 
     def test_delete_stale_records(self):
         initial_count = Constance.objects.count()
 
-        Constance.objects.create(key='STALE_KEY', value=None)
-        call_command('constance', 'remove_stale_keys', stdout=self.out)
+        Constance.objects.create(key="STALE_KEY", value=None)
+        call_command("constance", "remove_stale_keys", stdout=self.out)
 
         self.assertEqual(Constance.objects.count(), initial_count, msg=self.out)
diff --git a/tests/test_codecs.py b/tests/test_codecs.py
index cf5f67b..48c306c 100644
--- a/tests/test_codecs.py
+++ b/tests/test_codecs.py
@@ -16,16 +16,16 @@ class TestJSONSerialization(TestCase):
         self.datetime = datetime(2023, 10, 5, 15, 30, 0)
         self.date = date(2023, 10, 5)
         self.time = time(15, 30, 0)
-        self.decimal = Decimal('10.5')
-        self.uuid = uuid.UUID('12345678123456781234567812345678')
-        self.string = 'test'
+        self.decimal = Decimal("10.5")
+        self.uuid = uuid.UUID("12345678123456781234567812345678")
+        self.string = "test"
         self.integer = 42
         self.float = 3.14
         self.boolean = True
         self.none = None
         self.timedelta = timedelta(days=1, hours=2, minutes=3)
         self.list = [1, 2, self.date]
-        self.dict = {'key': self.date, 'key2': 1}
+        self.dict = {"key": self.date, "key2": 1}
 
     def test_serializes_and_deserializes_default_types(self):
         self.assertEqual(dumps(self.datetime), '{"__type__": "datetime", "__value__": "2023-10-05T15:30:00"}')
@@ -65,18 +65,18 @@ class TestJSONSerialization(TestCase):
             self.assertEqual(t, loads(dumps(t)))
 
     def test_invalid_deserialization(self):
-        with self.assertRaisesRegex(ValueError, 'Expecting value'):
-            loads('THIS_IS_NOT_RIGHT')
-        with self.assertRaisesRegex(ValueError, 'Invalid object'):
+        with self.assertRaisesRegex(ValueError, "Expecting value"):
+            loads("THIS_IS_NOT_RIGHT")
+        with self.assertRaisesRegex(ValueError, "Invalid object"):
             loads('{"__type__": "THIS_IS_NOT_RIGHT", "__value__": "test", "THIS_IS_NOT_RIGHT": "THIS_IS_NOT_RIGHT"}')
-        with self.assertRaisesRegex(ValueError, 'Unsupported type'):
+        with self.assertRaisesRegex(ValueError, "Unsupported type"):
             loads('{"__type__": "THIS_IS_NOT_RIGHT", "__value__": "test"}')
 
     def test_handles_unknown_type(self):
         class UnknownType:
             pass
 
-        with self.assertRaisesRegex(TypeError, 'Object of type UnknownType is not JSON serializable'):
+        with self.assertRaisesRegex(TypeError, "Object of type UnknownType is not JSON serializable"):
             dumps(UnknownType())
 
     def test_custom_type_serialization(self):
@@ -84,25 +84,25 @@ class TestJSONSerialization(TestCase):
             def __init__(self, value):
                 self.value = value
 
-        register_type(CustomType, 'custom', lambda o: o.value, lambda o: CustomType(o))
-        custom_data = CustomType('test')
+        register_type(CustomType, "custom", lambda o: o.value, lambda o: CustomType(o))
+        custom_data = CustomType("test")
         json_data = dumps(custom_data)
         self.assertEqual(json_data, '{"__type__": "custom", "__value__": "test"}')
         deserialized_data = loads(json_data)
         self.assertTrue(isinstance(deserialized_data, CustomType))
-        self.assertEqual(deserialized_data.value, 'test')
+        self.assertEqual(deserialized_data.value, "test")
 
     def test_register_known_type(self):
-        with self.assertRaisesRegex(ValueError, 'Discriminator must be specified'):
-            register_type(int, '', lambda o: o.value, lambda o: int(o))
-        with self.assertRaisesRegex(ValueError, 'Type with discriminator default is already registered'):
-            register_type(int, 'default', lambda o: o.value, lambda o: int(o))
-        register_type(int, 'new_custom_type', lambda o: o.value, lambda o: int(o))
-        with self.assertRaisesRegex(ValueError, 'Type with discriminator new_custom_type is already registered'):
-            register_type(int, 'new_custom_type', lambda o: o.value, lambda o: int(o))
+        with self.assertRaisesRegex(ValueError, "Discriminator must be specified"):
+            register_type(int, "", lambda o: o.value, lambda o: int(o))
+        with self.assertRaisesRegex(ValueError, "Type with discriminator default is already registered"):
+            register_type(int, "default", lambda o: o.value, lambda o: int(o))
+        register_type(int, "new_custom_type", lambda o: o.value, lambda o: int(o))
+        with self.assertRaisesRegex(ValueError, "Type with discriminator new_custom_type is already registered"):
+            register_type(int, "new_custom_type", lambda o: o.value, lambda o: int(o))
 
     def test_nested_collections(self):
-        data = {'key': [[[[{'key': self.date}]]]]}
+        data = {"key": [[[[{"key": self.date}]]]]}
         self.assertEqual(
             dumps(data),
             (
diff --git a/tests/test_form.py b/tests/test_form.py
index 105d2ef..74ea9ee 100644
--- a/tests/test_form.py
+++ b/tests/test_form.py
@@ -8,16 +8,16 @@ class TestForm(TestCase):
     def test_form_field_types(self):
         f = ConstanceForm({})
 
-        self.assertIsInstance(f.fields['INT_VALUE'], fields.IntegerField)
-        self.assertIsInstance(f.fields['BOOL_VALUE'], fields.BooleanField)
-        self.assertIsInstance(f.fields['STRING_VALUE'], fields.CharField)
-        self.assertIsInstance(f.fields['DECIMAL_VALUE'], fields.DecimalField)
-        self.assertIsInstance(f.fields['DATETIME_VALUE'], fields.SplitDateTimeField)
-        self.assertIsInstance(f.fields['TIMEDELTA_VALUE'], fields.DurationField)
-        self.assertIsInstance(f.fields['FLOAT_VALUE'], fields.FloatField)
-        self.assertIsInstance(f.fields['DATE_VALUE'], fields.DateField)
-        self.assertIsInstance(f.fields['TIME_VALUE'], fields.TimeField)
+        self.assertIsInstance(f.fields["INT_VALUE"], fields.IntegerField)
+        self.assertIsInstance(f.fields["BOOL_VALUE"], fields.BooleanField)
+        self.assertIsInstance(f.fields["STRING_VALUE"], fields.CharField)
+        self.assertIsInstance(f.fields["DECIMAL_VALUE"], fields.DecimalField)
+        self.assertIsInstance(f.fields["DATETIME_VALUE"], fields.SplitDateTimeField)
+        self.assertIsInstance(f.fields["TIMEDELTA_VALUE"], fields.DurationField)
+        self.assertIsInstance(f.fields["FLOAT_VALUE"], fields.FloatField)
+        self.assertIsInstance(f.fields["DATE_VALUE"], fields.DateField)
+        self.assertIsInstance(f.fields["TIME_VALUE"], fields.TimeField)
 
         # from CONSTANCE_ADDITIONAL_FIELDS
-        self.assertIsInstance(f.fields['CHOICE_VALUE'], fields.ChoiceField)
-        self.assertIsInstance(f.fields['EMAIL_VALUE'], fields.EmailField)
+        self.assertIsInstance(f.fields["CHOICE_VALUE"], fields.ChoiceField)
+        self.assertIsInstance(f.fields["EMAIL_VALUE"], fields.EmailField)
diff --git a/tests/test_pytest_overrides.py b/tests/test_pytest_overrides.py
index c6b7a80..b218533 100644
--- a/tests/test_pytest_overrides.py
+++ b/tests/test_pytest_overrides.py
@@ -42,10 +42,10 @@ try:
             """Assert that the class decorator changes config.BOOL_VALUE."""
             assert not config.BOOL_VALUE
 
-        @pytest.mark.override_config(BOOL_VALUE='True')
+        @pytest.mark.override_config(BOOL_VALUE="True")
         def test_override_config_on_overridden_value(self):
             """Ensure that method mark decorator changes already overridden value for class."""
-            assert config.BOOL_VALUE == 'True'
+            assert config.BOOL_VALUE == "True"
 
     def test_fixture_override_config(override_config):
         """
@@ -66,7 +66,7 @@ except ImportError:
 
 class PytestTests(unittest.TestCase):
     def setUp(self):
-        self.skipTest('Skip all pytest tests when using unittest')
+        self.skipTest("Skip all pytest tests when using unittest")
 
     def test_do_not_skip_silently(self):
         """If no at least one test present, unittest silently skips module."""
diff --git a/tests/test_utils.py b/tests/test_utils.py
index e403c9b..531426c 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -11,32 +11,32 @@ from constance.utils import get_values_for_keys
 
 class UtilsTestCase(TestCase):
     def test_set_value_validation(self):
-        self.assertRaisesMessage(ValidationError, 'Enter a whole number.', _set_constance_value, 'INT_VALUE', 'foo')
+        self.assertRaisesMessage(ValidationError, "Enter a whole number.", _set_constance_value, "INT_VALUE", "foo")
         self.assertRaisesMessage(
             ValidationError,
-            'Enter a valid email address.',
+            "Enter a valid email address.",
             _set_constance_value,
-            'EMAIL_VALUE',
-            'not a valid email',
+            "EMAIL_VALUE",
+            "not a valid email",
         )
         self.assertRaisesMessage(
             ValidationError,
-            'Enter a valid date.',
+            "Enter a valid date.",
             _set_constance_value,
-            'DATETIME_VALUE',
+            "DATETIME_VALUE",
             (
-                '2000-00-00',
-                '99:99:99',
+                "2000-00-00",
+                "99:99:99",
             ),
         )
         self.assertRaisesMessage(
             ValidationError,
-            'Enter a valid time.',
+            "Enter a valid time.",
             _set_constance_value,
-            'DATETIME_VALUE',
+            "DATETIME_VALUE",
             (
-                '2016-01-01',
-                '99:99:99',
+                "2016-01-01",
+                "99:99:99",
             ),
         )
 
@@ -44,37 +44,37 @@ class UtilsTestCase(TestCase):
         self.assertEqual(
             get_values(),
             {
-                'FLOAT_VALUE': 3.1415926536,
-                'BOOL_VALUE': True,
-                'EMAIL_VALUE': 'test@example.com',
-                'INT_VALUE': 1,
-                'CHOICE_VALUE': 'yes',
-                'TIME_VALUE': datetime.time(23, 59, 59),
-                'DATE_VALUE': datetime.date(2010, 12, 24),
-                'TIMEDELTA_VALUE': datetime.timedelta(days=1, hours=2, minutes=3),
-                'LINEBREAK_VALUE': 'Spam spam',
-                'DECIMAL_VALUE': Decimal('0.1'),
-                'STRING_VALUE': 'Hello world',
-                'DATETIME_VALUE': datetime.datetime(2010, 8, 23, 11, 29, 24),
-                'LIST_VALUE': [1, '1', datetime.date(2019, 1, 1)],
-                'JSON_VALUE': {
-                    'key': 'value',
-                    'key2': 2,
-                    'key3': [1, 2, 3],
-                    'key4': {'key': 'value'},
-                    'key5': datetime.date(2019, 1, 1),
-                    'key6': None,
+                "FLOAT_VALUE": 3.1415926536,
+                "BOOL_VALUE": True,
+                "EMAIL_VALUE": "test@example.com",
+                "INT_VALUE": 1,
+                "CHOICE_VALUE": "yes",
+                "TIME_VALUE": datetime.time(23, 59, 59),
+                "DATE_VALUE": datetime.date(2010, 12, 24),
+                "TIMEDELTA_VALUE": datetime.timedelta(days=1, hours=2, minutes=3),
+                "LINEBREAK_VALUE": "Spam spam",
+                "DECIMAL_VALUE": Decimal("0.1"),
+                "STRING_VALUE": "Hello world",
+                "DATETIME_VALUE": datetime.datetime(2010, 8, 23, 11, 29, 24),
+                "LIST_VALUE": [1, "1", datetime.date(2019, 1, 1)],
+                "JSON_VALUE": {
+                    "key": "value",
+                    "key2": 2,
+                    "key3": [1, 2, 3],
+                    "key4": {"key": "value"},
+                    "key5": datetime.date(2019, 1, 1),
+                    "key6": None,
                 },
             },
         )
 
     def test_get_values_for_keys(self):
         self.assertEqual(
-            get_values_for_keys(['BOOL_VALUE', 'CHOICE_VALUE', 'LINEBREAK_VALUE']),
+            get_values_for_keys(["BOOL_VALUE", "CHOICE_VALUE", "LINEBREAK_VALUE"]),
             {
-                'BOOL_VALUE': True,
-                'CHOICE_VALUE': 'yes',
-                'LINEBREAK_VALUE': 'Spam spam',
+                "BOOL_VALUE": True,
+                "CHOICE_VALUE": "yes",
+                "LINEBREAK_VALUE": "Spam spam",
             },
         )
 
@@ -87,9 +87,9 @@ class UtilsTestCase(TestCase):
             AttributeError,
             '"OLD_VALUE, BOLD_VALUE" keys not found in configuration.',
             get_values_for_keys,
-            ['BOOL_VALUE', 'OLD_VALUE', 'BOLD_VALUE'],
+            ["BOOL_VALUE", "OLD_VALUE", "BOLD_VALUE"],
         )
 
     def test_get_values_for_keys_invalid_input_type(self):
         with self.assertRaises(TypeError):
-            get_values_for_keys('key1')
+            get_values_for_keys("key1")
diff --git a/tests/urls.py b/tests/urls.py
index dfc7362..083932c 100644
--- a/tests/urls.py
+++ b/tests/urls.py
@@ -2,5 +2,5 @@ from django.contrib import admin
 from django.urls import path
 
 urlpatterns = [
-    path('admin/', admin.site.urls),
+    path("admin/", admin.site.urls),
 ]