diff --git a/tests/unit-tests/util/concepts.t.cpp b/tests/unit-tests/util/concepts.t.cpp
index 522e737..ea9542a 100644
--- a/tests/unit-tests/util/concepts.t.cpp
+++ b/tests/unit-tests/util/concepts.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2015 Regents of the University of California,
+ * Copyright (c) 2014-2015 Regents of the University of California,
  *                         Arizona Board of Regents,
  *                         Colorado State University,
  *                         University Pierre & Marie Curie, Sorbonne University,
diff --git a/tests/unit-tests/util/ethernet.t.cpp b/tests/unit-tests/util/ethernet.t.cpp
index e8e59e5..38e05aa 100644
--- a/tests/unit-tests/util/ethernet.t.cpp
+++ b/tests/unit-tests/util/ethernet.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) 2014-2016 Regents of the University of California,
  *                         Arizona Board of Regents,
  *                         Colorado State University,
  *                         University Pierre & Marie Curie, Sorbonne University,
diff --git a/tests/unit-tests/util/notification-stream.t.cpp b/tests/unit-tests/util/notification-stream.t.cpp
index 65522b0..3697c41 100644
--- a/tests/unit-tests/util/notification-stream.t.cpp
+++ b/tests/unit-tests/util/notification-stream.t.cpp
@@ -1,12 +1,12 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2017, Regents of the University of California,
- *                          Arizona Board of Regents,
- *                          Colorado State University,
- *                          University Pierre & Marie Curie, Sorbonne University,
- *                          Washington University in St. Louis,
- *                          Beijing Institute of Technology,
- *                          The University of Memphis
+ * Copyright (c) 2014-2017 Regents of the University of California,
+ *                         Arizona Board of Regents,
+ *                         Colorado State University,
+ *                         University Pierre & Marie Curie, Sorbonne University,
+ *                         Washington University in St. Louis,
+ *                         Beijing Institute of Technology,
+ *                         The University of Memphis.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
diff --git a/tests/unit-tests/util/notification-subscriber.t.cpp b/tests/unit-tests/util/notification-subscriber.t.cpp
index 5b22e48..e7144e9 100644
--- a/tests/unit-tests/util/notification-subscriber.t.cpp
+++ b/tests/unit-tests/util/notification-subscriber.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2017 Regents of the University of California,
+ * Copyright (c) 2014-2017 Regents of the University of California,
  *                         Arizona Board of Regents,
  *                         Colorado State University,
  *                         University Pierre & Marie Curie, Sorbonne University,
diff --git a/tests/unit-tests/util/simple-notification.hpp b/tests/unit-tests/util/simple-notification.hpp
index 23f26f8..084a5f2 100644
--- a/tests/unit-tests/util/simple-notification.hpp
+++ b/tests/unit-tests/util/simple-notification.hpp
@@ -1,12 +1,12 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2014-2017,  Regents of the University of California,
- *                           Arizona Board of Regents,
- *                           Colorado State University,
- *                           University Pierre & Marie Curie, Sorbonne University,
- *                           Washington University in St. Louis,
- *                           Beijing Institute of Technology,
- *                           The University of Memphis.
+ * Copyright (c) 2014-2017 Regents of the University of California,
+ *                         Arizona Board of Regents,
+ *                         Colorado State University,
+ *                         University Pierre & Marie Curie, Sorbonne University,
+ *                         Washington University in St. Louis,
+ *                         Beijing Institute of Technology,
+ *                         The University of Memphis.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *