diff --git a/tests/integration_tests/test_scheduling_marking.py b/tests/integration_tests/test_scheduling_marking.py
index b37c301..48459c6 100644
--- a/tests/integration_tests/test_scheduling_marking.py
+++ b/tests/integration_tests/test_scheduling_marking.py
@@ -1,3 +1,9 @@
+# Copyright The PFDL Contributors
+#
+# Licensed under the MIT License.
+# For details on the licensing terms, see the LICENSE file.
+# SPDX-License-Identifier: MIT
+
 """Contains integration tests to check the marking of the petri net."""
 
 # standard libraries