diff --git a/aleksis/core/apps.py b/aleksis/core/apps.py
index 030e56d6da582a522443a26a912be0af37eca091..e627b0a2e6b93a6e661cdceaef21ec824e4daedb 100644
--- a/aleksis/core/apps.py
+++ b/aleksis/core/apps.py
@@ -14,7 +14,7 @@ from .registries import (
     site_preferences_registry,
 )
 from .util.apps import AppConfig
-from .util.core_helpers import get_site_preferences, has_person, lazy_preference
+from .util.core_helpers import get_site_preferences, has_person
 from .util.sass_helpers import clean_scss
 
 
diff --git a/aleksis/core/settings.py b/aleksis/core/settings.py
index ec1dc61ed4ae61f4d9566b4ce8c7991a709726cb..8826bc9ea39a8f226e0140fd57bcae734efd2a2d 100644
--- a/aleksis/core/settings.py
+++ b/aleksis/core/settings.py
@@ -208,7 +208,7 @@ if _settings.get("ldap.uri", None):
         NestedGroupOfNamesType,
         NestedGroupOfUniqueNamesType,
         PosixGroupType,
-    )  # noqa
+    )
 
     # Enable Django's integration to LDAP
     AUTHENTICATION_BACKENDS.append("django_auth_ldap.backend.LDAPBackend")
diff --git a/aleksis/core/util/core_helpers.py b/aleksis/core/util/core_helpers.py
index 788a4debec2a9ec7b3fb6c52f97121dbe9179340..37ab87eec9c93fdc44d33ea322ef5aee4f3cb0ad 100644
--- a/aleksis/core/util/core_helpers.py
+++ b/aleksis/core/util/core_helpers.py
@@ -365,7 +365,6 @@ def queryset_rules_filter(
     obj: Union[HttpRequest, Model], queryset: QuerySet, perm: str
 ) -> QuerySet:
     """Filter queryset by user and permission."""
-
     wanted_objects = set()
     if isinstance(obj, HttpRequest) and hasattr(obj, "user"):
         obj = obj.user
diff --git a/tox.ini b/tox.ini
index 3729453a385969ca89622ab38e214b4b7ae9a104..eca63a758a5f6a20b1cd11887330817fec7908d7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -23,7 +23,7 @@ setenv =
 [testenv:lint]
 commands =
     - poetry run black --check --diff aleksis/
-    - poetry run isort -c --diff --stdout -rc aleksis/
+    - poetry run isort -c --diff --stdout aleksis/
     poetry run flake8 {posargs} aleksis/
 
 [testenv:security]
@@ -40,7 +40,7 @@ commands = poetry run make -C docs/ html {posargs}
 
 [testenv:reformat]
 commands =
-    poetry run isort -rc aleksis/
+    poetry run isort aleksis/
     poetry run black aleksis/
 
 [flake8]
@@ -52,7 +52,6 @@ ignore = BLK100,E203,E231,W503,D100,D101,D102,D103,D104,D105,D106,D107,RST215,RS
 line_length = 100
 multi_line_output = 3
 include_trailing_comma = 1
-use_parantheses = 1
 default_section = THIRDPARTY
 known_first_party = aleksis
 known_django = django