diff --git a/go/summarize/summarize-transactions_test.go b/go/summarize/summarize-transactions_test.go
index ada2c04..b2e3e6c 100644
--- a/go/summarize/summarize-transactions_test.go
+++ b/go/summarize/summarize-transactions_test.go
@@ -1,3 +1,16 @@
+/*
+Copyright 2024 The Vitess Authors.
+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.
+*/
+
 package summarize
 
 import (