diff --git a/src/model_config_tests/qa/test_access_esm1p5_config.py b/src/model_config_tests/qa/test_access_esm1p5_config.py
index b9e2fe2..1591dcc 100644
--- a/src/model_config_tests/qa/test_access_esm1p5_config.py
+++ b/src/model_config_tests/qa/test_access_esm1p5_config.py
@@ -128,7 +128,7 @@ def test_config_start(self, branch, config):
                 "calendar.start", "config.yaml", VALID_HISTORICAL_START
             )
         else:
-            pytest.fail(f"Cannot test unknown scenario {branch.scenario_name}.")
+            pytest.fail(f"Cannot test unknown scenario {branch.config_scenario}.")
 
     def test_config_runtime(self, config):
         assert (