diff --git a/uvdat/core/models/project.py b/uvdat/core/models/project.py
index 92c8a844..aab151f3 100644
--- a/uvdat/core/models/project.py
+++ b/uvdat/core/models/project.py
@@ -36,7 +36,7 @@ def followers(self):
 
     @transaction.atomic()
     def delete_users_perms(self, users: list[User]):
-        """Deletes all permissions a user may have on this project."""
+        """Delete all permissions a user may have on this project."""
         user_ids = [user.id for user in users]
         UserObjectPermission.objects.filter(
             content_type__app_label=self._meta.app_label,
diff --git a/uvdat/core/rest/serializers.py b/uvdat/core/rest/serializers.py
index c7500d63..de30f7cd 100644
--- a/uvdat/core/rest/serializers.py
+++ b/uvdat/core/rest/serializers.py
@@ -1,7 +1,6 @@
 from django.contrib.auth.models import User
 from django.contrib.gis.geos import Point
 from django.contrib.gis.serializers import geojson
-from guardian.shortcuts import get_users_with_perms
 from rest_framework import serializers
 
 from uvdat.core.models import (
diff --git a/uvdat/core/tests/conftest.py b/uvdat/core/tests/conftest.py
index 238bd207..751a343b 100644
--- a/uvdat/core/tests/conftest.py
+++ b/uvdat/core/tests/conftest.py
@@ -5,7 +5,7 @@
 
 from uvdat.core.models import Project
 
-from .factory_fixtures import *  # noqa: F403
+from .factory_fixtures import *  # noqa: F403, F401
 
 
 @pytest.fixture
diff --git a/uvdat/core/tests/factories.py b/uvdat/core/tests/factories.py
index 2f05d6cc..e0165e6c 100644
--- a/uvdat/core/tests/factories.py
+++ b/uvdat/core/tests/factories.py
@@ -12,7 +12,7 @@
 
 
 class FuzzyPointField(factory.fuzzy.BaseFuzzyAttribute):
-    """Yields random point"""
+    """Yield random point."""
 
     def __init__(self, **kwargs):
         super().__init__(**kwargs)
diff --git a/uvdat/core/tests/test_dataset.py b/uvdat/core/tests/test_dataset.py
index 31068f72..67552814 100644
--- a/uvdat/core/tests/test_dataset.py
+++ b/uvdat/core/tests/test_dataset.py
@@ -2,7 +2,7 @@
 
 import pytest
 
-from uvdat.core.models.networks import Network, NetworkEdge, NetworkNode
+from uvdat.core.models.networks import Network, NetworkNode
 from uvdat.core.models.project import Dataset, Project
 
 
@@ -81,7 +81,8 @@ def test_rest_dataset_gcc(
     dataset = network.dataset
     project.datasets.add(dataset)
     resp = authenticated_api_client.get(
-        f'/api/v1/datasets/{dataset.id}/gcc/?project={project.id}&exclude_nodes={connecting_node.id}'
+        f'/api/v1/datasets/{dataset.id}/gcc/'
+        f'?project={project.id}&exclude_nodes={connecting_node.id}'
     )
 
     larger_group: list[NetworkNode] = max(group_a, group_b, key=len)
@@ -109,7 +110,8 @@ def test_rest_dataset_map_layers_incorrect_layer_type(
     for _ in range(3):
         factory(dataset=dataset)
 
-    # Check that nothing is returned, since map_layers will only return map layers that match the dataset's type
+    # Check that nothing is returned, since map_layers will only
+    # return map layers that match the dataset's type
     resp = authenticated_api_client.get(f'/api/v1/datasets/{dataset.id}/map_layers/')
     assert resp.status_code == 200
     assert resp.json() == []