diff --git a/thousandeyes-sdk-administrative/test/test_account_groups_api.py b/thousandeyes-sdk-administrative/test/test_account_groups_api.py
index d9abde67..24d56e3d 100644
--- a/thousandeyes-sdk-administrative/test/test_account_groups_api.py
+++ b/thousandeyes-sdk-administrative/test/test_account_groups_api.py
@@ -34,7 +34,8 @@ class TestAccountGroupsApi(unittest.TestCase):
         request_body_json = """
                 {
                   "accountGroupName" : "My testing account group",
-                  "agents" : [ "105", "719" ]
+                  "agents" : [ "105", "719" ],
+                  "extra" : "fail"
                 }"""
 
         request_loaded_json = json.loads(request_body_json)