Hello, I think I’m asking too much of test harness, but is there a way to automatically deactivate a test when running with VALGRIND=1 without having to play around with PETSC_RUNNING_ON_VALGRIND in the code? I see the variable PETSCTEST_VALGRIND, but it seems rather static and set depending on PETSC_ARCH. So even if there is src/snes/tutorials/ex19.c: requires: defined(PETSC_USE_LOG) !defined(PETSCTEST_VALGRIND), Running make -f gmakefile test s='snes*logviewmemory' VALGRIND=1 on my machine (without valgrind in the PETSC_ARCH) gets the test going. Thanks, Pierre