diff --git a/tests/core/ltlcrossgrind.test b/tests/core/ltlcrossgrind.test
index a9f7b1eb9..1814bcd15 100755
--- a/tests/core/ltlcrossgrind.test
+++ b/tests/core/ltlcrossgrind.test
@@ -1,6 +1,6 @@
 #! /bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2014 Laboratoire de Recherche et Dévelopement to
+# Copyright (C) 2014 Laboratoire de Recherche et Développement de
 # l'Epita (LRDE).
 #
 # This file is part of Spot, a model checking library.
diff --git a/tests/core/ltlgrind.test b/tests/core/ltlgrind.test
index abc95285c..0cbc0dae4 100755
--- a/tests/core/ltlgrind.test
+++ b/tests/core/ltlgrind.test
@@ -1,7 +1,7 @@
 #! /bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2014, 2015 Laboratoire de Recherche et Dévelopement to
-# l'Epita (LRDE).
+# Copyright (C) 2014, 2015 Laboratoire de Recherche et Développement
+# de l'Epita (LRDE).
 #
 # This file is part of Spot, a model checking library.
 #
diff --git a/tests/core/ltlrel.test b/tests/core/ltlrel.test
index 4f403ef66..b734bee18 100755
--- a/tests/core/ltlrel.test
+++ b/tests/core/ltlrel.test
@@ -1,7 +1,7 @@
 #! /bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2013, 2016 Laboratoire de Recherche et Dévelopement to
-# l'Epita (LRDE).
+# Copyright (C) 2013, 2016 Laboratoire de Recherche et Développement
+# de l'Epita (LRDE).
 #
 # This file is part of Spot, a model checking library.
 #