diff --git a/tests/test_wip.cpp b/tests/test_wip.cpp
new file mode 100644
index 000000000..3961bfdd5
--- /dev/null
+++ b/tests/test_wip.cpp
@@ -0,0 +1,3 @@
+#include "pybind11_tests.h"
+
+TEST_SUBMODULE(wip, m) { m.attr("__doc__") = "WIP"; }
diff --git a/tests/test_wip.py b/tests/test_wip.py
new file mode 100644
index 000000000..438b37202
--- /dev/null
+++ b/tests/test_wip.py
@@ -0,0 +1,7 @@
+from __future__ import annotations
+
+from pybind11_tests import wip as m
+
+
+def test_doc():
+    assert m.__doc__ == "WIP"