diff --git a/tox.ini b/tox.ini
index 1b8a0fd..abc9e42 100644
--- a/tox.ini
+++ b/tox.ini
@@ -86,7 +86,7 @@
 sitepackages = True
 setenv = VIRTUAL_ENV={envdir}
 commands =
-    python -m tempest/stress/run_stress -a -d 3600
+    python -m tempest/stress/run_stress -a -d 3600 -S
 
 [testenv:venv]
 commands = {posargs}