[boost] marking regression test failures as expected

Hi, I noticed in the regression tests results taht some failing tests are marked as "fail*" in greyish color indicating that the failure is expected along with the explanation why. E.g., http://www.boost.org/development/tests/develop/developer/output/teeks99-03a-... Question: how can I indicate that the new failure is expected in the same manner? Regards, &rzej