diff --git a/tests/unit-tests/security/transform/hex-encode.t.cpp b/tests/unit-tests/security/transform/hex-encode.t.cpp
index 5edcaaa..527fc75 100644
--- a/tests/unit-tests/security/transform/hex-encode.t.cpp
+++ b/tests/unit-tests/security/transform/hex-encode.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
- * Copyright (c) 2013-2016 Regents of the University of California.
+/*
+ * Copyright (c) 2013-2017 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -24,7 +24,6 @@
 #include "security/transform/step-source.hpp"
 #include "security/transform/stream-sink.hpp"
 #include "encoding/buffer-stream.hpp"
-#include <iostream>
 
 #include "boost-test.hpp"