diff --git a/kolibri/core/device/test/test_api.py b/kolibri/core/device/test/test_api.py
index 39127b9f61e..3d5afe7971c 100644
--- a/kolibri/core/device/test/test_api.py
+++ b/kolibri/core/device/test/test_api.py
@@ -201,8 +201,12 @@ def test_create_superuser_error(self):
     def test_osuser_superuser_created(self):
         with mock.patch(
             "kolibri.core.device.serializers.GetOSUserHook", autospec=True
-        ) as mock_hook1, mock.patch("kolibri.core.auth.models.GetOSUserHook") as mock_hook2:
-            mock_hook1.retrieve_os_user.return_value = mock_hook2.retrieve_os_user.return_value = ("test_user", True)
+        ) as mock_hook1, mock.patch(
+            "kolibri.core.auth.models.GetOSUserHook"
+        ) as mock_hook2:
+            mock_hook1.retrieve_os_user.return_value = (
+                mock_hook2.retrieve_os_user.return_value
+            ) = ("test_user", True)
             mock_hook1.is_registered = mock_hook2.is_registered = True
             initialize_url = app_initialize_url(auth_token="test")
             self.client.get(initialize_url)