diff --git a/NEWS b/NEWS
index f100b1734..3f0384069 100644
--- a/NEWS
+++ b/NEWS
@@ -196,6 +196,9 @@ New in spot 2.9.6.dev (not yet released)
   - Bindings for functions related to games.
     See https://spot.lrde.epita.fr/ipynb/games.html for examples.
 
+  - spot::twa::prop_set was previously abstent from the Python
+    binding.  It is now available as spot.twa_prop_set (issue #453).
+
   Bugs fixed:
 
   - tgba_determinize() could create parity automata using more colors
diff --git a/python/spot/impl.i b/python/spot/impl.i
index e3c76fe2b..27f819207 100644
--- a/python/spot/impl.i
+++ b/python/spot/impl.i
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2009-2020 Laboratoire de Recherche et Développement
+// Copyright (C) 2009-2021 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 // Copyright (C) 2003-2006 Laboratoire d'Informatique de Paris 6
 // (LIP6), département Systèmes Répartis Coopératifs (SRC), Université
@@ -526,6 +526,8 @@ namespace std {
     }
 %}
 
+%feature("flatnested") spot::twa::prop_set;
+%rename (twa_prop_set) spot::twa::prop_set;
 %include <spot/twa/twa.hh>
 
 %include <spot/tl/apcollect.hh>
diff --git a/tests/python/twagraph.py b/tests/python/twagraph.py
index d6eec94f7..69afa735d 100644
--- a/tests/python/twagraph.py
+++ b/tests/python/twagraph.py
@@ -1,5 +1,5 @@
 # -*- mode: python; coding: utf-8 -*-
-# Copyright (C) 2017 Laboratoire de Recherche et Développement de l'Epita
+# Copyright (C) 2017, 2021 Laboratoire de Recherche et Développement de l'Epita
 # (LRDE).
 #
 # This file is part of Spot, a model checking library.
@@ -53,8 +53,19 @@ except RuntimeError as e:
     s = str(e)
     assert "abstract interface" in s and "alternating automata" in s
 
+cpy = spot.make_twa_graph(aut, spot.twa_prop_set.all())
+assert aut.to_str() == cpy.to_str()
 all = aut.set_buchi()
+assert aut.to_str() != cpy.to_str()
+cpy = spot.make_twa_graph(aut, spot.twa_prop_set.all())
 aut.new_acc_edge(0, 1, bddtrue, True)
+assert aut.num_edges() == 1 + cpy.num_edges()
+
+aut.prop_universal(True)
+cpy = spot.make_twa_graph(aut, spot.twa_prop_set(False, False, False,
+                                                 False, False, False))
+assert cpy.prop_universal() != aut.prop_universal()
+assert cpy.prop_universal() == spot.trival.maybe()
 
 try:
     s = aut.state_acc_sets(0)