diff --git a/tests/test_methods_and_attributes.cpp b/tests/test_methods_and_attributes.cpp
index f433847c76..e324c8bdd4 100644
--- a/tests/test_methods_and_attributes.cpp
+++ b/tests/test_methods_and_attributes.cpp
@@ -294,7 +294,7 @@ TEST_SUBMODULE(methods_and_attributes, m) {
                                  static_cast<py::str (ExampleMandA::*)(int, int)>(
                                      &ExampleMandA::overloaded));
                     })
-        .def("__str__", &ExampleMandA::toString)
+        .def("__str__", &ExampleMandA::toString, py::pos_only())
         .def_readwrite("value", &ExampleMandA::value);
 
     // test_copy_method
diff --git a/tests/test_methods_and_attributes.py b/tests/test_methods_and_attributes.py
index 91c7b7751e..cecc184647 100644
--- a/tests/test_methods_and_attributes.py
+++ b/tests/test_methods_and_attributes.py
@@ -19,6 +19,13 @@
 )
 
 
+def test_self_only_pos_only():
+    assert (
+        m.ExampleMandA.__str__.__doc__
+        == "__str__(self: pybind11_tests.methods_and_attributes.ExampleMandA, /) -> str\n"
+    )
+
+
 def test_methods_and_attributes():
     instance1 = m.ExampleMandA()
     instance2 = m.ExampleMandA(32)