It seems that setting the BOOST_TEST_LOG_LEVEL environment variable (or command line parameter) to "messages" no longer displays messages (in Boost 1.33 as compared to 1.31 or 1.32). I've read the 1.33 release notes a couple of times, and read through the (not always straightforward) Boost Test documentation, but cannot find what has changed, or why the BOOST_MESSAGE displays are no longer happening. I'm sure I'm doing something silly, or maybe this has changed between Boost Test releases and I just can't find the applicable documentation. Here's a minimal code example: #include <boost/test/unit_test.hpp> #include <boost/test/included/unit_test_framework.hpp> using namespace boost::unit_test_framework; void messageTest() { int i = 44; BOOST_MESSAGE("Testing Boost Message, i = " << i); } test_suite* init_unit_test_suite (int, char* [] ) { test_suite* test = BOOST_TEST_SUITE ("Boost Message Test"); test->add( BOOST_TEST_CASE ( &messageTest ) ); return test; } Thanks for any help! Cliff