Hello everybody, I am resending this email as I suppose that the previous one wasn’t accepted due to a big attachment inside. If I create a double post, please excuse me, I didn’t mean to. I set up a clean libvirt repo with: git clone ./autogen.sh make and then executed tests with various values of LIBVIRT_DEBUG using the following command: LIBVIRT_DEBUG=0…5 VIR_TEST_DEBUG=1 make check With LIBVIRT_DEBUG=0 (or =5 or probably any invalid value), the logs say: "Ignoring invalid log level setting” but still, 10 tests fail due to various reasons. With LIBVIRT_DEBUG=1, there is a slight difference. The number of tests that fail is also 10, but here, commandtest fails instead of eventtest. With LIBVIRT_DEBUG=2, only 9 tests fail, because commandtest passes. With LIBVIRT_DEBUG=3, only 1 test fails: qemuargv2xmltest. The reason is the same as in the previous tests. With LIBVIRT_DEBUG=4, it’s just qemuargv2xmltest that is failing, but for a different reason than before: "qemuParseCommandLineString should have logged a warning”. Links to tests/test-syslog.log, indexed by value of LIBVIRT_DEBUG: 0: http://pastebin.com/bZrDV1K2 <http://pastebin.com/bZrDV1K2> 1: https://gist.github.com/Darge/d180ebdd497573ed633625cf136de73c <https://gist.github.com/Darge/d180ebdd497573ed633625cf136de73c> 2: http://pastebin.com/bhsq1MtC <http://pastebin.com/bhsq1MtC> 3: http://pastebin.com/BSRtR9Rq <http://pastebin.com/BSRtR9Rq> 4: http://pastebin.com/FQn79her <http://pastebin.com/FQn79her> Perhaps it’s okay that these tests fail, but still there's no harm in letting people know. Thank you rbogorodskiy for guidance on the mailing list :) Have a nice day, Tomasz