diff --git a/netbox/netbox/tests/test_authentication.py b/netbox/netbox/tests/test_authentication.py
index 39e82df61..74f4c411a 100644
--- a/netbox/netbox/tests/test_authentication.py
+++ b/netbox/netbox/tests/test_authentication.py
@@ -201,13 +201,11 @@ class ObjectPermissionViewTestCase(TestCase):
         self.assertHttpStatus(response, 403)
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
             attrs={'site__name': 'Site 1'},
             can_view=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Retrieve permitted object
         response = self.client.get(self.prefixes[0].get_absolute_url())
@@ -225,13 +223,11 @@ class ObjectPermissionViewTestCase(TestCase):
         self.assertHttpStatus(response, 403)
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
             attrs={'site__name': 'Site 1'},
             can_view=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Retrieve all objects. Only permitted objects should be returned.
         response = self.client.get(reverse('ipam:prefix_list'))
@@ -259,14 +255,12 @@ class ObjectPermissionViewTestCase(TestCase):
         self.assertEqual(initial_count, Prefix.objects.count())
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
             attrs={'site__name': 'Site 1'},
             can_view=True,
             can_add=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Attempt to create a non-permitted object
         request = {
@@ -307,14 +301,12 @@ class ObjectPermissionViewTestCase(TestCase):
         self.assertHttpStatus(response, 403)
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
             attrs={'site__name': 'Site 1'},
             can_view=True,
             can_change=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Attempt to edit a non-permitted object
         request = {
@@ -351,14 +343,12 @@ class ObjectPermissionViewTestCase(TestCase):
         self.assertHttpStatus(response, 403)
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
             attrs={'site__name': 'Site 1'},
             can_view=True,
             can_delete=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Delete permitted object
         request = {
@@ -400,13 +390,11 @@ class ObjectPermissionViewTestCase(TestCase):
         self.assertEqual(initial_count, Prefix.objects.count())
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
             attrs={'site__name': 'Site 1'},
             can_add=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Attempt to create non-permitted objects
         request = {
@@ -449,13 +437,11 @@ class ObjectPermissionViewTestCase(TestCase):
         self.assertHttpStatus(response, 403)
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
             attrs={'site__name': 'Site 1'},
             can_change=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Attempt to edit non-permitted objects
         request = {
@@ -493,14 +479,12 @@ class ObjectPermissionViewTestCase(TestCase):
         self.assertHttpStatus(response, 403)
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
             attrs={'site__name': 'Site 1'},
             can_view=True,
             can_delete=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Attempt to delete non-permitted object
         request = {
@@ -565,15 +549,11 @@ class ObjectPermissionAPIViewTestCase(TestCase):
         self.assertEqual(response.status_code, 403)
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
-            attrs={
-                'site__name': 'Site 1',
-            },
+            attrs={'site__name': 'Site 1'},
             can_view=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Retrieve permitted object
         url = reverse('ipam-api:prefix-detail', kwargs={'pk': self.prefixes[0].pk})
@@ -594,15 +574,11 @@ class ObjectPermissionAPIViewTestCase(TestCase):
         self.assertEqual(response.status_code, 403)
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
-            attrs={
-                'site__name': 'Site 1',
-            },
+            attrs={'site__name': 'Site 1'},
             can_view=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Retrieve all objects. Only permitted objects should be returned.
         response = self.client.get(url, **self.header)
@@ -623,13 +599,11 @@ class ObjectPermissionAPIViewTestCase(TestCase):
         self.assertEqual(response.status_code, 403)
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
             attrs={'site__name': 'Site 1'},
             can_add=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Attempt to create a non-permitted object
         response = self.client.post(url, data, format='json', **self.header)
@@ -652,13 +626,11 @@ class ObjectPermissionAPIViewTestCase(TestCase):
         self.assertEqual(response.status_code, 403)
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
             attrs={'site__name': 'Site 1'},
             can_change=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Attempt to edit a non-permitted object
         data = {'site': self.sites[0].pk}
@@ -687,13 +659,11 @@ class ObjectPermissionAPIViewTestCase(TestCase):
         self.assertEqual(response.status_code, 403)
 
         # Assign object permission
-        obj_perm = ObjectPermission(
+        self.user.object_permissions.create(
             model=ContentType.objects.get_for_model(Prefix),
             attrs={'site__name': 'Site 1'},
             can_delete=True
         )
-        obj_perm.save()
-        obj_perm.users.add(self.user)
 
         # Attempt to delete a non-permitted object
         url = reverse('ipam-api:prefix-detail', kwargs={'pk': self.prefixes[3].pk})
diff --git a/netbox/utilities/auth_backends.py b/netbox/utilities/auth_backends.py
index 99e4f559a..bb705a6df 100644
--- a/netbox/utilities/auth_backends.py
+++ b/netbox/utilities/auth_backends.py
@@ -122,14 +122,10 @@ class RemoteUserBackend(_RemoteUserBackend):
             try:
                 app_label, codename = permission_name.split('.')
                 action, model_name = codename.split('_')
-
-                kwargs = {
+                user.object_permissions.create(**{
                     'model': ContentType.objects.get(app_label=app_label, model=model_name),
                     f'can_{action}': True
-                }
-                obj_perm = ObjectPermission(**kwargs)
-                obj_perm.save()
-                obj_perm.users.add(user)
+                })
                 permissions_list.append(permission_name)
             except ValueError:
                 logging.error(
diff --git a/netbox/utilities/testing/testcases.py b/netbox/utilities/testing/testcases.py
index 8346f5d04..86f465364 100644
--- a/netbox/utilities/testing/testcases.py
+++ b/netbox/utilities/testing/testcases.py
@@ -1,5 +1,5 @@
 from django.contrib.contenttypes.models import ContentType
-from django.contrib.auth.models import Permission, User
+from django.contrib.auth.models import User
 from django.core.exceptions import ObjectDoesNotExist
 from django.forms.models import model_to_dict
 from django.test import Client, TestCase as _TestCase, override_settings
@@ -7,7 +7,6 @@ from django.urls import reverse, NoReverseMatch
 from rest_framework.test import APIClient
 
 from users.models import ObjectPermission, Token
-from utilities.permissions import get_permission_for_model
 from .utils import disable_warnings, post_data
 
 
@@ -36,13 +35,10 @@ class TestCase(_TestCase):
             app_label, codename = name.split('.')
             action, model_name = codename.split('_')
 
-            kwargs = {
+            self.user.object_permissions.create(**{
                 'model': ContentType.objects.get(app_label=app_label, model=model_name),
                 f'can_{action}': True
-            }
-            obj_perm = ObjectPermission(**kwargs)
-            obj_perm.save()
-            obj_perm.users.add(self.user)
+            })
 
     def remove_permissions(self, *names):
         """
@@ -52,12 +48,10 @@ class TestCase(_TestCase):
             app_label, codename = name.split('.')
             action, model_name = codename.split('_')
 
-            kwargs = {
-                'user': self.user,
+            self.user.object_permissions.filter(**{
                 'model': ContentType.objects.get(app_label=app_label, model=model_name),
                 f'can_{action}': True
-            }
-            ObjectPermission.objects.filter(**kwargs).delete()
+            }).delete()
 
     #
     # Convenience methods