diff --git a/tests/generic_config_updater/gu_common_test.py b/tests/generic_config_updater/gu_common_test.py
index eef9c132cb0..398558bd651 100644
--- a/tests/generic_config_updater/gu_common_test.py
+++ b/tests/generic_config_updater/gu_common_test.py
@@ -67,7 +67,7 @@ def test_validate_field_operation_illegal(self):
         old_config = {"PFC_WD": {"GLOBAL": {"POLL_INTERVAL": 60}}}
         target_config = {"PFC_WD": {"GLOBAL": {}}}
         config_wrapper = gu_common.ConfigWrapper()
-        self.assertRaises(gu_common.IllegalPatchOperationerror, config_wrapper.validate_field_operation, old_config, target_config)
+        self.assertRaises(gu_common.IllegalPatchOperationError, config_wrapper.validate_field_operation, old_config, target_config)
 
     def test_ctor__default_values_set(self):
         config_wrapper = gu_common.ConfigWrapper()