diff --git a/src/lambda/handler-runner/python-runner/invoke.py b/src/lambda/handler-runner/python-runner/invoke.py
index 9ecc23fcc..9fd0e4aa3 100644
--- a/src/lambda/handler-runner/python-runner/invoke.py
+++ b/src/lambda/handler-runner/python-runner/invoke.py
@@ -104,7 +104,7 @@ def log(self):
             '__offline_payload__': result
         }
 
-        if isinstance(result['body'], bytes):
+        if hasattr(result, 'body') and isinstance(result['body'], bytes):
             data['__offline_payload__']['body'] = base64.b64encode(result['body']).decode('utf-8')
             data['isBase64Encoded'] = True