I tried to use BOOST_FIXTURE_TEST_SUITE to use a fixture in multiple tests. Of course it works fine yet the behavior was not as I expected. What I was expecting which I learned from testing was that the fixture was setup and torn down on each test rather than when the suite ended. In my present problem I have a class which represents the initialization steps of an simulation. There are various algorithms that need to be executed and the results of one can be used in another. So what I was hoping to learn how to do is have a fixture which I can use in the tests of a suite which is only setup and torn down once respectively. So something like: #define BOOST_TEST_MODULE long_life_fixture #include struct CommonData { CommonData() : i ( 0.0 ) { BOOST_TEST_MESSAGE("setup CommonData"); } ~CommonData() { BOOST_TEST_MESSAGE("tear down CommonData"); } double i; }; BOOST_FIXTURE_TEST_SUITE ( class_tests, CommonData ) BOOST_AUTO_TEST_CASE ( function1_test ) { i = 5.0; BOOST_CHECK_EQUAL ( i, 5.0 ); } BOOST_AUTO_TEST_CASE ( function2_test ) { double j = i * 5; BOOST_CHECK_EQUAL ( j, 25.0 ); } BOOST_AUTO_TEST_SUITE_END() Stephen Stephen Torri, PhD NAVAL SURFACE WARFARE CENTER DAHLGREN 17214 Ave B Suite 121 Dahlgren, Va. 22448 540-653-1082 I am not a contracting officer. I cannot modify or initiate contracts, nor do I have the authority to financially commit the government in any way.