diff --git a/tests/conftest.py b/tests/conftest.py
index c6064b703e7..825ffbdf6cb 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -44,7 +44,7 @@ async def assert_request(
 
         if assert_data is not None:
             if callable(assert_data):
-                assert assert_data(r_body)
+                assert assert_data(r_body), r_body
             else:
                 assert r_body == assert_data