diff --git a/tox.ini b/tox.ini
index ba817594..dda4989b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -112,6 +112,7 @@ commands =
            --tb native \
            -v \
            -s \
+           -x \
            {posargs}
 
 [testenv:integration-centos]