diff --git a/tox.ini b/tox.ini
index 8c08984..97f03e2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ install_command = pip install -U --allow-external gnocchi --allow-insecure gnocc
 setenv =
    VIRTUAL_ENV={envdir}
    GNOCCHI_CLIENT_EXEC_DIR={envdir}/bin
-passenv = GNOCCHI_*
+passenv = GNOCCHI_* OS_TEST_TIMEOUT OS_STDOUT_CAPTURE OS_STDERR_CAPTURE OS_LOG_CAPTURE
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = {toxinidir}/setup-tests.sh python setup.py test --slowest --testr-args='{posargs}'