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diff --git a/libstdc++-v3/testsuite/ext/mt_allocator/tune-3.cc b/libstdc++-v3/testsuite/ext/mt_allocator/tune-3.cc
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+++ b/libstdc++-v3/testsuite/ext/mt_allocator/tune-3.cc
@@ -0,0 +1,94 @@
+// 2004-08-25 Benjamin Kosnik <bkoz@redhat.com>
+//
+// Copyright (C) 2004, 2005, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library 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, or (at your option)
+// any later version.
+//
+// This 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <testsuite_hooks.h>
+#include <memory>
+#include <ext/mt_allocator.h>
+
+// Tune characteristics, two of same type
+template<typename _Tp>
+struct test_policy
+{ static bool per_type() { return true; } };
+
+using __gnu_cxx::__pool;
+using __gnu_cxx::__common_pool_policy;
+
+template<>
+struct test_policy<__common_pool_policy<__pool, true> >
+{ static bool per_type() { return false; } };
+
+template<>
+struct test_policy<__common_pool_policy<__pool, false> >
+{ static bool per_type() { return false; } };
+
+// Tune characteristics, two of different types
+template<typename _Tp, typename _Cp>
+void test03()
+{
+  bool test __attribute__((unused)) = true;
+
+  typedef __gnu_cxx::__pool_base::_Tune tune_type;
+  typedef _Tp value_type;
+  typedef _Cp policy_type;
+  typedef __gnu_cxx::__mt_alloc<value_type, policy_type> allocator_type;
+
+  allocator_type a;
+  tune_type t_default = a._M_get_options();
+  tune_type t_opt(32, 5120, 32, 5120, 20, 10, false);
+  tune_type t_small(16, 1024, 32, 2048, 1, 10, false);
+
+  // First instances assured.
+  tune_type t1 = t_default;
+  if (test_policy<policy_type>::per_type())
+    {
+      a._M_set_options(t_opt);
+      t1 = a._M_get_options();
+      VERIFY( t1._M_align != t_default._M_align );
+    }
+
+  // Lock tune settings.
+  typename allocator_type::pointer p1 = a.allocate(128);
+
+  allocator_type a2;
+  tune_type t2 = a2._M_get_options();  
+  VERIFY( t2._M_chunk_size == t1._M_chunk_size );
+
+  typename allocator_type::pointer p2 = a2.allocate(5128);
+
+  a2._M_set_options(t_small);
+  tune_type t3 = a2._M_get_options();
+  VERIFY( t3._M_chunk_size != t_small._M_chunk_size );
+  VERIFY( t3._M_chunk_size == t2._M_chunk_size );
+
+  a.deallocate(p1, 128);
+  a2.deallocate(p2, 5128);
+}
+
+int main()
+{
+#ifdef __GTHREADS
+  test03<int, __gnu_cxx::__per_type_pool_policy<int, __pool, true> >();
+  test03<int, __gnu_cxx::__common_pool_policy<__pool, true> >();
+#endif
+
+  test03<int, __gnu_cxx::__per_type_pool_policy<int, __pool, false> >();
+  test03<int, __gnu_cxx::__common_pool_policy<__pool, false> >();
+
+  return 0;
+}