diff --git a/testing/acceptance_test.py b/testing/acceptance_test.py
index 18bdc0076..cbda9934d 100644
--- a/testing/acceptance_test.py
+++ b/testing/acceptance_test.py
@@ -1302,4 +1302,6 @@ def test_function_return_non_none_warning(testdir) -> None:
     """
     )
     res = testdir.runpytest()
-    res.stdout.fnmatch_lines(["*PytestReturnNotNoneWarning: Test function returning*"])
+    res.stdout.fnmatch_lines(
+        ["*PytestReturnNotNoneWarning: Expected None, but the test returned*"]
+    )