diff --git a/tests/global-configuration.cpp b/tests/global-configuration.cpp
deleted file mode 100644
index 1d62e1e..0000000
--- a/tests/global-configuration.cpp
+++ /dev/null
@@ -1,64 +0,0 @@
-/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/*
- * Copyright (c) 2014-2022,  Regents of the University of California.
- *
- * This file is part of ndn-tools (Named Data Networking Essential Tools).
- * See AUTHORS.md for complete list of ndn-tools authors and contributors.
- *
- * ndn-tools 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.
- *
- * ndn-tools 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 a copy of the GNU General Public License along with
- * ndn-tools, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "core/common.hpp"
-
-#include "tests/boost-test.hpp"
-
-#include <boost/filesystem.hpp>
-#include <fstream>
-#include <stdlib.h>
-
-namespace ndn::tests {
-
-class GlobalConfiguration
-{
-public:
-  GlobalConfiguration()
-  {
-    const char* envHome = ::getenv("HOME");
-    if (envHome)
-      m_home = envHome;
-
-    auto testHome = boost::filesystem::path(UNIT_TESTS_TMPDIR) / "test-home";
-    if (::setenv("HOME", testHome.c_str(), 1) != 0)
-      NDN_THROW(std::runtime_error("setenv() failed"));
-
-    boost::filesystem::create_directories(testHome);
-
-    std::ofstream clientConf((testHome / ".ndn" / "client.conf").c_str());
-    clientConf << "pib=pib-sqlite3" << std::endl
-               << "tpm=tpm-file" << std::endl;
-  }
-
-  ~GlobalConfiguration() noexcept
-  {
-    if (m_home.empty())
-      ::unsetenv("HOME");
-    else
-      ::setenv("HOME", m_home.data(), 1);
-  }
-
-private:
-  std::string m_home;
-};
-
-BOOST_TEST_GLOBAL_CONFIGURATION(GlobalConfiguration);
-
-} // namespace ndn::tests
diff --git a/tests/key-chain-fixture.cpp b/tests/key-chain-fixture.cpp
deleted file mode 100644
index 010716c..0000000
--- a/tests/key-chain-fixture.cpp
+++ /dev/null
@@ -1,91 +0,0 @@
-/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/*
- * Copyright (c) 2014-2022,  Regents of the University of California.
- *
- * This file is part of ndn-tools (Named Data Networking Essential Tools).
- * See AUTHORS.md for complete list of ndn-tools authors and contributors.
- *
- * ndn-tools 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.
- *
- * ndn-tools 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 a copy of the GNU General Public License along with
- * ndn-tools, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "tests/key-chain-fixture.hpp"
-
-#include <ndn-cxx/util/io.hpp>
-
-#include <boost/filesystem/operations.hpp>
-
-namespace ndn::tests {
-
-using namespace ndn::security;
-
-KeyChainFixture::KeyChainFixture()
-  : m_keyChain("pib-memory:", "tpm-memory:")
-{
-}
-
-KeyChainFixture::~KeyChainFixture()
-{
-  boost::system::error_code ec;
-  for (const auto& certFile : m_certFiles) {
-    boost::filesystem::remove(certFile, ec); // ignore error
-  }
-}
-
-bool
-KeyChainFixture::saveCert(const Data& cert, const std::string& filename)
-{
-  m_certFiles.push_back(filename);
-  try {
-    ndn::io::save(cert, filename);
-    return true;
-  }
-  catch (const ndn::io::Error&) {
-    return false;
-  }
-}
-
-bool
-KeyChainFixture::saveIdentityCert(const Identity& identity, const std::string& filename)
-{
-  Certificate cert;
-  try {
-    cert = identity.getDefaultKey().getDefaultCertificate();
-  }
-  catch (const Pib::Error&) {
-    return false;
-  }
-
-  return saveCert(cert, filename);
-}
-
-bool
-KeyChainFixture::saveIdentityCert(const Name& identityName, const std::string& filename,
-                                  bool allowCreate)
-{
-  Identity id;
-  try {
-    id = m_keyChain.getPib().getIdentity(identityName);
-  }
-  catch (const Pib::Error&) {
-    if (allowCreate) {
-      id = m_keyChain.createIdentity(identityName);
-    }
-  }
-
-  if (!id) {
-    return false;
-  }
-
-  return saveIdentityCert(id, filename);
-}
-
-} // namespace ndn::tests
diff --git a/tests/key-chain-fixture.hpp b/tests/key-chain-fixture.hpp
index 0ef6ff8..8eaffc2 100644
--- a/tests/key-chain-fixture.hpp
+++ b/tests/key-chain-fixture.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2022,  Regents of the University of California.
+ * Copyright (c) 2013-2022 Regents of the University of California.
  *
  * This file is part of ndn-tools (Named Data Networking Essential Tools).
  * See AUTHORS.md for complete list of ndn-tools authors and contributors.
@@ -21,59 +21,16 @@
 #define NDN_TOOLS_TESTS_KEY_CHAIN_FIXTURE_HPP
 
 #include <ndn-cxx/security/key-chain.hpp>
-#include <ndn-cxx/security/signing-helpers.hpp>
 
 namespace ndn::tests {
 
 /**
  * @brief A fixture providing an in-memory KeyChain.
- *
- * Test cases can use this fixture to create identities. Identities, certificates, and
- * saved certificates are automatically removed during test teardown.
  */
 class KeyChainFixture
 {
 protected:
-  using Certificate = ndn::security::Certificate;
-  using Identity    = ndn::security::Identity;
-  using Key         = ndn::security::Key;
-
-public:
-  /**
-   * @brief Saves an NDN certificate to a file
-   * @return true if successful, false otherwise
-   */
-  bool
-  saveCert(const Data& cert, const std::string& filename);
-
-  /**
-   * @brief Saves the default certificate of @p identity to a file
-   * @return true if successful, false otherwise
-   */
-  bool
-  saveIdentityCert(const Identity& identity, const std::string& filename);
-
-  /**
-   * @brief Saves the default certificate of the identity named @p identityName to a file
-   * @param identityName Name of the identity
-   * @param filename File name, must be writable
-   * @param allowCreate If true, create the identity if it does not exist
-   * @return true if successful, false otherwise
-   */
-  bool
-  saveIdentityCert(const Name& identityName, const std::string& filename,
-                   bool allowCreate = false);
-
-protected:
-  KeyChainFixture();
-
-  ~KeyChainFixture();
-
-protected:
-  ndn::KeyChain m_keyChain;
-
-private:
-  std::vector<std::string> m_certFiles;
+  ndn::KeyChain m_keyChain{"pib-memory:", "tpm-memory:"};
 };
 
 } // namespace ndn::tests
diff --git a/tests/wscript b/tests/wscript
index 19bb8e7..3ecb2e0 100644
--- a/tests/wscript
+++ b/tests/wscript
@@ -2,14 +2,9 @@
 top = '..'
 
 def build(bld):
-    if not bld.env.WITH_TESTS:
-        return
-
-    tmpdir = 'UNIT_TESTS_TMPDIR="%s"' % bld.bldnode.make_node('tmp-files')
     bld.program(
         target='../unit-tests',
         name='unit-tests',
         source=bld.path.ant_glob(['*.cpp'] + ['%s/**/*.cpp' % tool for tool in bld.env.BUILD_TOOLS]),
         use=['core-objects'] + ['%s-objects' % tool for tool in bld.env.BUILD_TOOLS],
-        defines=[tmpdir],
         install_path=None)