diff --git a/tests/unit-tests/make-interest-data.hpp b/tests/unit-tests/make-interest-data.hpp
new file mode 100644
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+++ b/tests/unit-tests/make-interest-data.hpp
@@ -0,0 +1,66 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2015 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
+ *
+ * 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.
+ */
+
+#ifndef NDN_TESTS_UNIT_TESTS_MAKE_INTEREST_DATA_HPP
+#define NDN_TESTS_UNIT_TESTS_MAKE_INTEREST_DATA_HPP
+
+#include "boost-test.hpp"
+
+#include "security/key-chain.hpp"
+
+namespace ndn {
+namespace util {
+
+inline shared_ptr<Interest>
+makeInterest(const Name& name)
+{
+  return make_shared<Interest>(name);
+}
+
+inline shared_ptr<Data>
+signData(const shared_ptr<Data>& data)
+{
+  ndn::SignatureSha256WithRsa fakeSignature;
+  fakeSignature.setValue(ndn::dataBlock(tlv::SignatureValue,
+                                        reinterpret_cast<const uint8_t*>(0), 0));
+  data->setSignature(fakeSignature);
+  data->wireEncode();
+
+  return data;
+}
+
+inline shared_ptr<Data>
+makeData(const Name& name)
+{
+  shared_ptr<Data> data = make_shared<Data>(name);
+
+  return signData(data);
+}
+
+} // namespace util
+} // namespace ndn
+
+#endif // NDN_TESTS_UNIT_TESTS_MAKE_INTEREST_DATA_HPP