diff --git a/tests/unit-tests/challenge-module.t.cpp b/tests/unit-tests/challenge-module.t.cpp
new file mode 100644
index 0000000..570aab1
--- /dev/null
+++ b/tests/unit-tests/challenge-module.t.cpp
@@ -0,0 +1,59 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2017, 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 "boost-test.hpp"
+#include "challenge-module.hpp"
+
+namespace ndn {
+namespace ndncert {
+namespace tests {
+
+BOOST_AUTO_TEST_SUITE(TestChallengeModule)
+
+BOOST_AUTO_TEST_CASE(GetJsonFromNameComponent)
+{
+  JsonSection json;
+  json.put("test", "123");
+  std::stringstream ss;
+  boost::property_tree::write_json(ss, json);
+  std::string jsonString = ss.str();
+  Block jsonContent = makeStringBlock(ndn::tlv::NameComponent, ss.str());
+
+  Name name("ndn");
+  name.append(jsonContent);
+  BOOST_CHECK(ChallengeModule::getJsonFromNameComponent(name, 1) == json);
+}
+
+BOOST_AUTO_TEST_CASE(GenDownloadName)
+{
+  Name interestName = ChallengeModule::genDownloadName(Name("ca"), "123");
+  BOOST_CHECK_EQUAL(interestName.getSubName(0, 1), Name("ca"));
+  BOOST_CHECK_EQUAL(interestName.getSubName(1, 1), Name("_DOWNLOAD"));
+
+  JsonSection json;
+  json.put(JSON_REQUEST_ID, "123");
+  BOOST_CHECK(ChallengeModule::getJsonFromNameComponent(interestName, 2) == json);
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+} // namespace tests
+} // namespace ndncert
+} // namespace ndn