diff --git a/test/erl/src/test_tether.erl b/test/erl/src/test_tether.erl
index c505145..dc11a9a 100644
--- a/test/erl/src/test_tether.erl
+++ b/test/erl/src/test_tether.erl
@@ -1,3 +1,21 @@
+%%
+%% Licensed to the Apache Software Foundation (ASF) under one
+%% or more contributor license agreements. See the NOTICE file
+%% distributed with this work for additional information
+%% regarding copyright ownership. The ASF licenses this file
+%% to you 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.
+%%
 %% Tests the behavior of clients in the face of transport errors.
 %% Makes sure start, start_linked, and start_tethered work as expected.