diff --git a/duplex_http_call_test.go b/duplex_http_call_test.go
index 13643e49..cff1654d 100644
--- a/duplex_http_call_test.go
+++ b/duplex_http_call_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.