diff --git a/tests/unit/net/network-configuration-detector.hpp b/tests/unit/net/network-configuration-detector.hpp
index 015b2b8..5c0c34b 100644
--- a/tests/unit/net/network-configuration-detector.hpp
+++ b/tests/unit/net/network-configuration-detector.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2013-2018 Regents of the University of California.
+ * Copyright (c) 2013-2021 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -19,8 +19,8 @@
  * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
  */
 
-#ifndef NDN_TESTS_UNIT_NET_NETWORK_CONFIGURATION_DETECTOR_HPP
-#define NDN_TESTS_UNIT_NET_NETWORK_CONFIGURATION_DETECTOR_HPP
+#ifndef NDN_CXX_TESTS_UNIT_NET_NETWORK_CONFIGURATION_DETECTOR_HPP
+#define NDN_CXX_TESTS_UNIT_NET_NETWORK_CONFIGURATION_DETECTOR_HPP
 
 #define SKIP_IF_IPV4_UNAVAILABLE() \
   do { \
@@ -72,4 +72,4 @@
 } // namespace tests
 } // namespace ndn
 
-#endif // NDN_TESTS_UNIT_NET_NETWORK_CONFIGURATION_DETECTOR_HPP
+#endif // NDN_CXX_TESTS_UNIT_NET_NETWORK_CONFIGURATION_DETECTOR_HPP