diff --git a/tests/test_model_api.py b/tests/test_model_api.py
index 79ab5418..b92fe907 100644
--- a/tests/test_model_api.py
+++ b/tests/test_model_api.py
@@ -587,7 +587,7 @@ def test_n_way_comparison_askenet(self):
         # Compare the ModelComparisonResponse models
         assert local_response == resp_model  # If assertion fails the diff is printed
         local_sorted_str = sorted_json_str(
-            json.loads(local_response.model_dump_json(**dict_options)),
+            json.loads(local_response.json(**dict_options)),
             skip_empty=True
         )
         resp_sorted_str = sorted_json_str(