diff --git a/tests/test_wholefile.py b/tests/test_wholefile.py
index 575444105..9cbef9a99 100644
--- a/tests/test_wholefile.py
+++ b/tests/test_wholefile.py
@@ -304,6 +304,7 @@ Do this:
 
 """
             coder.partial_response_function_call = dict()
+            return []
 
         coder.send = MagicMock(side_effect=mock_send)