diff --git a/tests/unit-tests/security/tpm/back-end-wrapper-file.hpp b/tests/unit-tests/security/tpm/back-end-wrapper-file.hpp
new file mode 100644
index 0000000..3e403ce
--- /dev/null
+++ b/tests/unit-tests/security/tpm/back-end-wrapper-file.hpp
@@ -0,0 +1,72 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2016 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_SECURITY_TPM_BACK_END_WRAPPER_FILE_HPP
+#define NDN_TESTS_SECURITY_TPM_BACK_END_WRAPPER_FILE_HPP
+
+#include "security/tpm/back-end-file.hpp"
+#include <boost/filesystem.hpp>
+
+namespace ndn {
+namespace security {
+namespace tpm {
+namespace tests {
+
+/**
+ * @brief A wrapper of tpm::BackEndFile for unit test template.
+ */
+class BackEndWrapperFile
+{
+public:
+  BackEndWrapperFile()
+    : m_tmpPath(boost::filesystem::path(UNIT_TEST_CONFIG_PATH) / "TpmFileTest")
+    , m_impl(new BackEndFile(m_tmpPath.string()))
+  {
+  }
+
+  ~BackEndWrapperFile()
+  {
+    boost::filesystem::remove_all(m_tmpPath);
+  }
+
+  BackEnd&
+  getTpm()
+  {
+    return *m_impl;
+  }
+
+  std::string
+  getScheme()
+  {
+    return "tpm-file";
+  }
+
+private:
+  boost::filesystem::path m_tmpPath;
+  unique_ptr<BackEnd> m_impl;
+};
+
+} // namespace tests
+} // namespace tpm
+} // namespace security
+} // namespace ndn
+
+#endif // NDN_TESTS_SECURITY_TPM_BACK_END_WRAPPER_FILE_HPP