diff --git a/tests/unit/lp/nack-header.t.cpp b/tests/unit/lp/nack-header.t.cpp
new file mode 100644
index 0000000..0645f40
--- /dev/null
+++ b/tests/unit/lp/nack-header.t.cpp
@@ -0,0 +1,117 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2018 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ *
+ * @author Eric Newberry <enewberry@email.arizona.edu>
+ */
+
+#include "lp/nack-header.hpp"
+
+#include "boost-test.hpp"
+
+namespace ndn {
+namespace lp {
+namespace tests {
+
+BOOST_AUTO_TEST_SUITE(Lp)
+BOOST_AUTO_TEST_SUITE(TestNackHeader)
+
+BOOST_AUTO_TEST_CASE(IsLessSevere)
+{
+  BOOST_CHECK_EQUAL(isLessSevere(NackReason::NONE, NackReason::NONE), false);
+  BOOST_CHECK_EQUAL(isLessSevere(NackReason::CONGESTION, NackReason::CONGESTION), false);
+
+  BOOST_CHECK_EQUAL(isLessSevere(NackReason::CONGESTION, NackReason::NONE), true);
+  BOOST_CHECK_EQUAL(isLessSevere(NackReason::NONE, NackReason::CONGESTION), false);
+
+  BOOST_CHECK_EQUAL(isLessSevere(NackReason::CONGESTION, NackReason::NO_ROUTE), true);
+  BOOST_CHECK_EQUAL(isLessSevere(NackReason::NO_ROUTE, NackReason::CONGESTION), false);
+}
+
+BOOST_AUTO_TEST_CASE(Encode)
+{
+  NackHeader header;
+  header.setReason(NackReason::DUPLICATE);
+
+  Block wire;
+  BOOST_REQUIRE_NO_THROW(wire = header.wireEncode());
+
+  // Sample encoded value obtained with:
+  // for (Buffer::const_iterator it = wire.begin(); it != wire.end(); ++it) {
+  //   printf("0x%02x, ", *it);
+  // }
+
+  // Contains NackReason::DUPLICATE
+  static const uint8_t expectedBlock[] = {
+    0xfd, 0x03, 0x20, 0x05, 0xfd, 0x03, 0x21, 0x01, 0x64,
+  };
+
+  BOOST_CHECK_EQUAL_COLLECTIONS(expectedBlock, expectedBlock + sizeof(expectedBlock),
+                                wire.begin(), wire.end());
+
+  BOOST_REQUIRE_NO_THROW(header.wireDecode(wire));
+}
+
+BOOST_AUTO_TEST_CASE(DecodeUnknownReasonCode)
+{
+  static const uint8_t expectedBlock[] = {
+    0xfd, 0x03, 0x20, 0x08, 0xfd, 0x03, 0x21, 0x04, 0xff, 0xff, 0xff, 0xff,
+  };
+
+  NackHeader header;
+  Block wire(expectedBlock, sizeof(expectedBlock));
+  BOOST_REQUIRE_NO_THROW(header.wireDecode(wire));
+  Block wireEncoded;
+  BOOST_REQUIRE_NO_THROW(wireEncoded = header.wireEncode());
+  BOOST_CHECK_EQUAL_COLLECTIONS(expectedBlock, expectedBlock + sizeof(expectedBlock),
+                                wireEncoded.begin(), wireEncoded.end());
+  BOOST_CHECK_EQUAL(header.getReason(), NackReason::NONE);
+}
+
+BOOST_AUTO_TEST_CASE(DecodeOmitReason)
+{
+  static const uint8_t expectedBlock[] = {
+    0xfd, 0x03, 0x20, 0x00,
+  };
+
+  NackHeader header;
+  Block wire(expectedBlock, sizeof(expectedBlock));
+  BOOST_REQUIRE_NO_THROW(header.wireDecode(wire));
+  Block wireEncoded;
+  BOOST_REQUIRE_NO_THROW(wireEncoded = header.wireEncode());
+  BOOST_CHECK_EQUAL_COLLECTIONS(expectedBlock, expectedBlock + sizeof(expectedBlock),
+                                wireEncoded.begin(), wireEncoded.end());
+  BOOST_CHECK_EQUAL(header.getReason(), NackReason::NONE);
+}
+
+BOOST_AUTO_TEST_CASE(Reason)
+{
+  NackHeader header;
+  BOOST_CHECK_EQUAL(header.getReason(), NackReason::NONE);
+
+  header.setReason(NackReason::DUPLICATE);
+  BOOST_CHECK_EQUAL(header.getReason(), NackReason::DUPLICATE);
+}
+
+BOOST_AUTO_TEST_SUITE_END() // TestNackHeader
+BOOST_AUTO_TEST_SUITE_END() // Lp
+
+} // namespace tests
+} // namespace lp
+} // namespace ndn