Sorry, I accidentally hit send too early... Does anyone have a solution for writing unit tests with Boost Test that run in multiple processes? I am using MPI, but I think the same problem would appear in other multi-process situations. I need some way to collect whether, e.g., BOOST_CHECK, has passed on all processes. Here's a simple example. I want my "example" test to fail because should_be_true is false on process 1. What happens is that I get success on process 0 and failure in process 1. What I want is a way to make the test fail on all processes. #define BOOST_TEST_MAIN #include BOOST_AUTO_TEST_CASE(example) { double should_be_unity; const double tolerance = 1.0e-10; // do something that sets should_be_unity to 1.0 // in process 0, and 1.1 in process 1. BOOST_CHECK_CLOSE(should_be_unity, 1.0, tolerance); } I then run the test with mpirun -np 2 ./mytest Obviously, I could write my own tests and collect the results, but then I couldn't use the built-in macros like BOOST_CHECK_CLOSE. Thanks for any advice. --Jim Amundson