diff --git a/airbyte-cdk/python/airbyte_cdk/sources/abstract_source.py b/airbyte-cdk/python/airbyte_cdk/sources/abstract_source.py
index 0f8bf716cc10..9a93d356997d 100644
--- a/airbyte-cdk/python/airbyte_cdk/sources/abstract_source.py
+++ b/airbyte-cdk/python/airbyte_cdk/sources/abstract_source.py
@@ -40,6 +40,10 @@ class AbstractSource(Source, ABC):
     in this class to create an Airbyte Specification compliant Source.
     """
 
+    @abstractmethod
+    def say_moo(self, times=0):
+        pass
+
     @abstractmethod
     def check_connection(self, logger: logging.Logger, config: Mapping[str, Any]) -> Tuple[bool, Optional[Any]]:
         """