diff --git a/tests/make-interest-data.hpp b/tests/make-interest-data.hpp
new file mode 100644
index 0000000..8fc5545
--- /dev/null
+++ b/tests/make-interest-data.hpp
@@ -0,0 +1,104 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2017 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.
+ */
+
+#ifndef NDN_TESTS_MAKE_INTEREST_DATA_HPP
+#define NDN_TESTS_MAKE_INTEREST_DATA_HPP
+
+#include "interest.hpp"
+#include "data.hpp"
+#include "link.hpp"
+#include "lp/nack.hpp"
+
+namespace ndn {
+namespace tests {
+
+/** \brief create an Interest
+ *  \param name Interest name
+ *  \param nonce if non-zero, set Nonce to this value
+ *               (useful for creating Nack with same Nonce)
+ */
+shared_ptr<Interest>
+makeInterest(const Name& name, uint32_t nonce = 0);
+
+/** \brief create a Data with fake signature
+ *  \note Data may be modified afterwards without losing the fake signature.
+ *        If a real signature is desired, sign again with KeyChain.
+ */
+shared_ptr<Data>
+makeData(const Name& name);
+
+/** \brief add a fake signature to Data
+ */
+Data&
+signData(Data& data);
+
+/** \brief add a fake signature to Data
+ */
+inline shared_ptr<Data>
+signData(shared_ptr<Data> data)
+{
+  signData(*data);
+  return data;
+}
+
+/** \brief create a Nack
+ *  \param interest Interest
+ *  \param reason Nack reason
+ */
+lp::Nack
+makeNack(const Interest& interest, lp::NackReason reason);
+
+/** \brief create a Nack
+ *  \param name Interest name
+ *  \param nonce Interest nonce
+ *  \param reason Nack reason
+ */
+lp::Nack
+makeNack(const Name& name, uint32_t nonce, lp::NackReason reason);
+
+/** \brief replace a name component
+ *  \param[inout] name name
+ *  \param index name component index
+ *  \param a arguments to name::Component constructor
+ */
+template<typename...A>
+void
+setNameComponent(Name& name, ssize_t index, const A& ...a)
+{
+  Name name2 = name.getPrefix(index);
+  name2.append(name::Component(a...));
+  name2.append(name.getSubName(name2.size()));
+  name = name2;
+}
+
+template<typename PKT, typename...A>
+void
+setNameComponent(PKT& pkt, ssize_t index, const A& ...a)
+{
+  Name name = pkt.getName();
+  setNameComponent(name, index, a...);
+  pkt.setName(name);
+}
+
+} // namespace tests
+} // namespace ndn
+
+#endif // NDN_TESTS_MAKE_INTEREST_DATA_HPP