diff --git a/swh/auth/tests/test_models.py b/swh/auth/tests/test_models.py
index e0ec95a..8f61216 100644
--- a/swh/auth/tests/test_models.py
+++ b/swh/auth/tests/test_models.py
@@ -1,71 +1,68 @@
 # Copyright (C) 2021  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
-from copy import copy
 from typing import Set
 
 import pytest
 
 from swh.auth.tests.app.apptest.models import AppUser
 
 PERMISSIONS: Set[str] = set(["api", "app-label-read"])
 NO_PERMISSION: Set[str] = set()
 
 
 @pytest.fixture
 def appuser():
-    return copy(
-        AppUser(
-            id=666,
-            username="foo",
-            password="bar",
-            first_name="foobar",
-            last_name="",
-            email="foo@bar.org",
-        )
+    return AppUser(
+        id=666,
+        username="foo",
+        password="bar",
+        first_name="foobar",
+        last_name="",
+        email="foo@bar.org",
     )
 
 
 @pytest.fixture
 def appuser_admin(appuser):
     appuser_admin = appuser
     appuser_admin.is_active = True
     appuser_admin.is_superuser = True
     return appuser_admin
 
 
 def test_django_appuser(appuser):
     appuser.permissions = PERMISSIONS
 
     assert appuser.get_group_permissions() == PERMISSIONS
     assert appuser.get_group_permissions(appuser) == PERMISSIONS
     assert appuser.get_all_permissions() == PERMISSIONS
     assert appuser.get_all_permissions(appuser) == PERMISSIONS
 
     assert "api" in PERMISSIONS
     assert appuser.has_perm("api") is True
     assert appuser.has_perm("something") is False
 
     assert "app-label-read" in PERMISSIONS
     assert appuser.has_module_perms("app-label") is True
     assert appuser.has_module_perms("app-something") is False
 
 
 def test_django_appuser_admin(appuser_admin):
     appuser_admin.permissions = NO_PERMISSION
 
     assert appuser_admin.get_group_permissions() == NO_PERMISSION
     assert appuser_admin.get_group_permissions(appuser_admin) == NO_PERMISSION
 
     assert appuser_admin.get_all_permissions() == NO_PERMISSION
     assert appuser_admin.get_all_permissions(appuser) == NO_PERMISSION
 
     assert "foobar" not in PERMISSIONS
     assert appuser_admin.has_perm("foobar") is True
     assert "something" not in PERMISSIONS
     assert appuser_admin.has_perm("something") is True
 
     assert appuser_admin.has_module_perms("app-label") is True
     assert appuser_admin.has_module_perms("really-whatever-app") is True