diff --git a/tests/test_class_sh_with_alias.cpp b/tests/test_class_sh_with_alias.cpp
deleted file mode 100644
index e62f8e763..000000000
--- a/tests/test_class_sh_with_alias.cpp
+++ /dev/null
@@ -1,61 +0,0 @@
-#include "pybind11_tests.h"
-
-#include <pybind11/smart_holder.h>
-
-#include <memory>
-
-namespace pybind11_tests {
-namespace test_class_sh_with_alias {
-
-struct Abase {
-    int val          = 0;
-    virtual ~Abase() = default;
-    Abase(int val_) : val{val_} {}
-    int Get() const { return val * 10 + 3; }
-    virtual int Add(int other_val) const = 0;
-
-    // Some compilers complain about implicitly defined versions of some of the following:
-    Abase(const Abase &) = default;
-    Abase(Abase &&)      = default;
-    Abase &operator=(const Abase &) = default;
-    Abase &operator=(Abase &&) = default;
-};
-
-struct AbaseAlias : Abase {
-    using Abase::Abase;
-
-    int Add(int other_val) const override {
-        PYBIND11_OVERRIDE_PURE(int,   /* Return type */
-                               Abase, /* Parent class */
-                               Add,   /* Name of function in C++ (must match Python name) */
-                               other_val);
-    }
-};
-
-int AddInCppRawPtr(const Abase *obj, int other_val) { return obj->Add(other_val) * 10 + 7; }
-
-int AddInCppSharedPtr(std::shared_ptr<Abase> obj, int other_val) {
-    return obj->Add(other_val) * 100 + 11;
-}
-
-int AddInCppUniquePtr(std::unique_ptr<Abase> obj, int other_val) {
-    return obj->Add(other_val) * 100 + 13;
-}
-
-} // namespace test_class_sh_with_alias
-} // namespace pybind11_tests
-
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::test_class_sh_with_alias::Abase)
-
-TEST_SUBMODULE(class_sh_with_alias, m) {
-    using namespace pybind11_tests::test_class_sh_with_alias;
-
-    py::classh<Abase, AbaseAlias>(m, "Abase")
-        .def(py::init<int>(), py::arg("val"))
-        .def("Get", &Abase::Get)
-        .def("Add", &Abase::Add, py::arg("other_val"));
-
-    m.def("AddInCppRawPtr", AddInCppRawPtr, py::arg("obj"), py::arg("other_val"));
-    m.def("AddInCppSharedPtr", AddInCppSharedPtr, py::arg("obj"), py::arg("other_val"));
-    m.def("AddInCppUniquePtr", AddInCppUniquePtr, py::arg("obj"), py::arg("other_val"));
-}
diff --git a/tests/test_class_sh_with_alias.py b/tests/test_class_sh_with_alias.py
deleted file mode 100644
index a8b10b849..000000000
--- a/tests/test_class_sh_with_alias.py
+++ /dev/null
@@ -1,31 +0,0 @@
-# -*- coding: utf-8 -*-
-
-from pybind11_tests import class_sh_with_alias as m
-
-
-class PyDrvd(m.Abase):
-    def __init__(self, val):
-        super(PyDrvd, self).__init__(val)
-
-    def Add(self, other_val):
-        return self.Get() * 100 + other_val
-
-
-def test_drvd_add():
-    drvd = PyDrvd(74)
-    assert drvd.Add(38) == (74 * 10 + 3) * 100 + 38
-
-
-def test_add_in_cpp_raw_ptr():
-    drvd = PyDrvd(52)
-    assert m.AddInCppRawPtr(drvd, 27) == ((52 * 10 + 3) * 100 + 27) * 10 + 7
-
-
-def test_add_in_cpp_shared_ptr():
-    drvd = PyDrvd(36)
-    assert m.AddInCppSharedPtr(drvd, 56) == ((36 * 10 + 3) * 100 + 56) * 100 + 11
-
-
-def test_add_in_cpp_unique_ptr():
-    drvd = PyDrvd(38)
-    assert m.AddInCppUniquePtr(drvd, 29) == ((38 * 10 + 3) * 100 + 29) * 100 + 13