diff --git a/tests/unit/test-home-env-saver.hpp b/tests/unit/test-home-env-saver.hpp
new file mode 100644
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--- /dev/null
+++ b/tests/unit/test-home-env-saver.hpp
@@ -0,0 +1,56 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2018 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_UNIT_TESTS_TEST_HOME_ENV_SAVER_HPP
+#define NDN_TESTS_UNIT_TESTS_TEST_HOME_ENV_SAVER_HPP
+
+#include <string>
+#include <cstdlib>
+
+namespace ndn {
+namespace tests {
+
+class TestHomeEnvSaver
+{
+public:
+  TestHomeEnvSaver()
+  {
+    if (std::getenv("TEST_HOME") != nullptr)
+      m_HOME = std::getenv("TEST_HOME");
+  }
+
+  virtual
+  ~TestHomeEnvSaver()
+  {
+    if (!m_HOME.empty())
+      setenv("TEST_HOME", m_HOME.c_str(), 1);
+    else
+      unsetenv("TEST_HOME");
+  }
+
+private:
+  std::string m_HOME;
+};
+
+} // namespace tests
+} // namespace ndn
+
+#endif // NDN_TESTS_UNIT_TESTS_TEST_HOME_ENV_SAVER_HPP