diff --git a/zulip_bots/zulip_bots/test_lib.py b/zulip_bots/zulip_bots/test_lib.py
index f1f61fb..2ce3069 100755
--- a/zulip_bots/zulip_bots/test_lib.py
+++ b/zulip_bots/zulip_bots/test_lib.py
@@ -129,6 +129,7 @@ class StubBotTestCase(TestCase):
         for (request, expected_response) in conversation:
             message = dict(
                 sender_email='foo@example.com',
+                sender_full_name='Foo Test User',
                 content=request,
             )
             bot_handler.reset_transcript()