diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index 640ec59145..b90979ac43 100644
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -1950,7 +1950,7 @@ unicode_asutf8andsize(PyObject *self, PyObject *args)
         return NULL;
     }
 
-    buffer = PyUnicode_AsUTF8AndSize(unicode, &utf8_len); 
+    buffer = PyUnicode_AsUTF8AndSize(unicode, &utf8_len);
     if (buffer == NULL) {
         return NULL;
     }
@@ -6074,6 +6074,74 @@ static PyTypeObject MethodDescriptor2_Type = {
 };
 
 
+
+typedef struct {
+    PyObject_HEAD
+    PyObject* dict;
+    PyObject* weakreflist;
+    PyObject* func;
+} badgc2object;
+
+static void
+badgc2object_dealloc(badgc2object *self)
+{
+    PyObject *res = PyObject_CallFunctionObjArgs(self->func, NULL);
+    PyErr_Clear();
+    Py_XDECREF(res);
+
+    Py_CLEAR(self->func);
+
+    if (self->weakreflist != NULL) {
+        PyObject_ClearWeakRefs((PyObject*)self);
+    }
+
+    Py_XDECREF(self->dict);
+    Py_TYPE(self)->tp_free((PyObject *) self);
+}
+
+static PyObject*
+badgc2object_set_func(badgc2object *self, PyObject *func)
+{
+    Py_INCREF(func);
+    self->func = func;
+    Py_RETURN_NONE;
+}
+
+static PyMethodDef badgc2object_methods[] = {
+    {"set_func", (PyCFunction)badgc2object_set_func, METH_O, NULL},
+    {NULL,              NULL}           /* sentinel */
+};
+
+static int
+badgc2object_traverse(badgc2object *self, visitproc visit, void *arg)
+{
+    Py_VISIT(self->func);
+    return 0;
+}
+
+static PyTypeObject BadGC2Type = {
+    /* Don't implement Py_TPFLAGS_HAVE_GC not tp_traverse:
+       the GC doesn't see the reference to func */
+    PyVarObject_HEAD_INIT(NULL, 0)
+    .tp_name = "BadGC2Type",
+    .tp_doc = "Bad GC Type",
+    .tp_basicsize = sizeof(badgc2object),
+    .tp_itemsize = 0,
+    .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
+
+    .tp_new = PyType_GenericNew,
+    .tp_free = PyObject_GC_Del,
+    .tp_traverse = (traverseproc)badgc2object_traverse,
+
+    .tp_getattro = PyObject_GenericGetAttr,
+    .tp_setattro = PyObject_GenericSetAttr,
+    .tp_dictoffset = offsetof(badgc2object, dict),
+    .tp_methods = badgc2object_methods,
+    .tp_dealloc = (destructor) badgc2object_dealloc,
+    .tp_weaklistoffset = offsetof(badgc2object, weakreflist)
+};
+
+
 static struct PyModuleDef _testcapimodule = {
     PyModuleDef_HEAD_INIT,
     "_testcapi",
@@ -6167,6 +6235,11 @@ PyInit__testcapi(void)
     PyModule_AddObject(m, "RecursingInfinitelyError",
                        (PyObject *)&PyRecursingInfinitelyError_Type);
 
+    if (PyType_Ready(&BadGC2Type) < 0)
+        return NULL;
+    Py_INCREF(&BadGC2Type);
+    PyModule_AddObject(m, "BadGC2Type", (PyObject *)&BadGC2Type);
+
     PyModule_AddObject(m, "CHAR_MAX", PyLong_FromLong(CHAR_MAX));
     PyModule_AddObject(m, "CHAR_MIN", PyLong_FromLong(CHAR_MIN));
     PyModule_AddObject(m, "UCHAR_MAX", PyLong_FromLong(UCHAR_MAX));