diff --git a/lib/php/phpunit.xml b/lib/php/phpunit.xml
index a5d287f..53b3f35 100644
--- a/lib/php/phpunit.xml
+++ b/lib/php/phpunit.xml
@@ -1,4 +1,22 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+ 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.
+-->
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          bootstrap="../../vendor/autoload.php"
          cacheResult="false"