diff --git a/netbox/users/tests/test_views.py b/netbox/users/tests/test_views.py
index 8226a8be9..e66c00d0a 100644
--- a/netbox/users/tests/test_views.py
+++ b/netbox/users/tests/test_views.py
@@ -180,7 +180,7 @@ class ObjectPermissionTestCase(
         cls.form_data = {
             'name': 'Permission X',
             'description': 'A new permission',
-            'object_types': [object_type.pk],
+            'object_types_1': [object_type.pk],  # SplitMultiSelectWidget requires _1 suffix on field name
             'actions': 'view,edit,delete',
         }