1 files changed, 7 insertions, 1 deletions
diff --git a/Modules/xxlimited.c b/Modules/xxlimited.c
index bd3f1783e6..5a6df8f2d8 100644
--- a/Modules/xxlimited.c
+++ b/Modules/xxlimited.c
@@ -50,8 +50,14 @@ Xxo_dealloc(XxoObject *self)
 static PyObject *
 Xxo_demo(XxoObject *self, PyObject *args)
 {
-    if (!PyArg_ParseTuple(args, ":demo"))
+    PyObject *o = NULL;
+    if (!PyArg_ParseTuple(args, "|O:demo", &o))
         return NULL;
+    /* Test availability of fast type checks */
+    if (o != NULL && PyUnicode_Check(o)) {
+        Py_INCREF(o);
+        return o;
+    }
     Py_INCREF(Py_None);
     return Py_None;
 }