diff --git a/tests/demo-lib/include/demo/Inheritance.h b/tests/demo-lib/include/demo/Inheritance.h
index 1b577cbe..f99ffa4a 100644
--- a/tests/demo-lib/include/demo/Inheritance.h
+++ b/tests/demo-lib/include/demo/Inheritance.h
@@ -1,15 +1,17 @@
 #pragma once
 #include <string>
 
-namespace demo{
+namespace demo
+{
+    // note: class stubs must not be sorted
+    // https://github.com/sizmailov/pybind11-stubgen/issues/231
 
-struct Base {
-  struct Inner{};
-  std::string name;
-};
-
-struct Derived : Base {
-  int count;
-};
+    struct MyBase {
+      struct Inner{};
+      std::string name;
+    };
 
+    struct Derived : MyBase {
+      int count;
+    };
 }
diff --git a/tests/py-demo/bindings/src/modules/classes.cpp b/tests/py-demo/bindings/src/modules/classes.cpp
index 347d9c11..f6689d10 100644
--- a/tests/py-demo/bindings/src/modules/classes.cpp
+++ b/tests/py-demo/bindings/src/modules/classes.cpp
@@ -19,13 +19,13 @@ void bind_classes_module(py::module&&m) {
     }
 
     {
-        py::class_<demo::Base> pyBase(m, "Base");
+        py::class_<demo::MyBase> pyMyBase(m, "MyBase");
 
-        pyBase.def_readwrite("name", &demo::Base::name);
+        pyMyBase.def_readwrite("name", &demo::MyBase::name);
 
-        py::class_<demo::Base::Inner>(pyBase, "Inner");
+        py::class_<demo::MyBase::Inner>(pyMyBase, "Inner");
 
-        py::class_<demo::Derived, demo::Base>(m, "Derived")
+        py::class_<demo::Derived, demo::MyBase>(m, "Derived")
             .def_readwrite("count", &demo::Derived::count);
 
     }