https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69371
--- Comment #4 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> --- Doh, I should have caught that earlier. The bug can be seen in: % grep -c dg-option special_functions/18_riemann_zeta/check_value.cc 3 Using dg-additional-option for the timeout solves the issue. Maybe the patch could also remove the redundant timeout adjustment in the testcase?