diff --git a/tests/unit-tests/ndncert-common.t.cpp b/tests/unit-tests/ndncert-common.t.cpp
new file mode 100644
index 0000000..40f1bb9
--- /dev/null
+++ b/tests/unit-tests/ndncert-common.t.cpp
@@ -0,0 +1,40 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2017-2020, Regents of the University of California.
+ *
+ * This file is part of ndncert, a certificate management system based on NDN.
+ *
+ * ndncert is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation, either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * ndncert 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 General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License along with
+ * ndncert, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndncert authors and contributors.
+ */
+
+#include "ndncert-common.hpp"
+#include "test-common.hpp"
+
+namespace ndn {
+namespace ndncert {
+namespace tests {
+
+BOOST_AUTO_TEST_SUITE(TestCommon)
+
+BOOST_AUTO_TEST_CASE(EncodingDecoding) {
+  const uint8_t str[] = {0xbc, 0x22, 0xf3, 0xf0, 0x5c, 0xc4, 0x0d, 0xb9,
+                         0x31, 0x1e, 0x41, 0x92, 0x96, 0x6f, 0xee, 0x92};
+  BOOST_CHECK_EQUAL(hexlify(str, sizeof(str)), "bc22f3f05cc40db9311e4192966fee92");
+}
+
+BOOST_AUTO_TEST_SUITE_END() // TestCommon
+
+} // namespace tests
+} // namespace ndncert
+} // namespace ndn