diff --git a/tests/test_compare_analytical.py b/tests/test_compare_analytical.py
index 7884b766..e12f7916 100644
--- a/tests/test_compare_analytical.py
+++ b/tests/test_compare_analytical.py
@@ -1,3 +1,21 @@
+# Copyright (C) 2015: The University of Edinburgh
+#            Authors: Craig Warren and Antonis Giannopoulos
+#
+# This file is part of gprMax.
+#
+# gprMax is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# gprMax is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with gprMax.  If not, see <http://www.gnu.org/licenses/>.
+
 import sys, os
 import h5py
 import numpy as np
diff --git a/tests/test_compare_experimental.py b/tests/test_compare_experimental.py
index 4ca7d755..7756b9da 100644
--- a/tests/test_compare_experimental.py
+++ b/tests/test_compare_experimental.py
@@ -1,3 +1,21 @@
+# Copyright (C) 2015: The University of Edinburgh
+#            Authors: Craig Warren and Antonis Giannopoulos
+#
+# This file is part of gprMax.
+#
+# gprMax is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# gprMax is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with gprMax.  If not, see <http://www.gnu.org/licenses/>.
+
 import sys, os
 import h5py
 import numpy as np
diff --git a/tests/test_compare_numerical.py b/tests/test_compare_numerical.py
index 63248f1d..a9c32fe0 100644
--- a/tests/test_compare_numerical.py
+++ b/tests/test_compare_numerical.py
@@ -1,3 +1,21 @@
+# Copyright (C) 2015: The University of Edinburgh
+#            Authors: Craig Warren and Antonis Giannopoulos
+#
+# This file is part of gprMax.
+#
+# gprMax is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# gprMax is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with gprMax.  If not, see <http://www.gnu.org/licenses/>.
+
 import sys, os
 import h5py
 import numpy as np