diff --git a/tests/python/unit_tests/tox.ini b/tests/python/unit_tests/tox.ini
index 301214c09..049a5798a 100644
--- a/tests/python/unit_tests/tox.ini
+++ b/tests/python/unit_tests/tox.ini
@@ -1,3 +1,17 @@
+; Copyright 2023 NWChemEx-Project
+;
+; Licensed under the Apache License, Version 2.0 (the "License");
+; you may not use this file except in compliance with the License.
+; You may obtain a copy of the License at
+;
+; http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+
 [tox]
 envlist = py37
 skipsdist = True