tests: sync common testing infrastructure with ndn-cxx

Change-Id: I6feab5247231abc35b8daa96bca21ad17c9cc4b3
diff --git a/tests/global-configuration.cpp b/tests/global-configuration.cpp
index 9a56347..a82937c 100644
--- a/tests/global-configuration.cpp
+++ b/tests/global-configuration.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2019,  Regents of the University of California,
+ * Copyright (c) 2014-2020,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -43,7 +43,7 @@
     if (envHome)
       m_home = envHome;
 
-    auto testHome = boost::filesystem::path(UNIT_TEST_CONFIG_PATH) / "test-home";
+    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"));