diff --git a/tests/test_class_sh_shared_ptr_copy_move.cpp b/tests/test_class_sh_shared_ptr_copy_move.cpp
index 5f2644fc8..7e1239651 100644
--- a/tests/test_class_sh_shared_ptr_copy_move.cpp
+++ b/tests/test_class_sh_shared_ptr_copy_move.cpp
@@ -26,7 +26,7 @@ using FooSmHld = Foo<1>;
 } // namespace
 } // namespace pybind11_tests
 
-PYBIND11_TYPE_CASTER_BASE_HOLDER(pybind11_tests::FooShPtr)
+PYBIND11_TYPE_CASTER_BASE_HOLDER(pybind11_tests::FooShPtr, std::shared_ptr<pybind11_tests::FooShPtr>)
 PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::FooSmHld)
 
 namespace pybind11_tests {