diff --git a/tox.ini b/tox.ini
index ff82b2ad0b..c35b7d82c4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -199,3 +199,6 @@ deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
+commands =
+   {[testenv]commands}
+   stestr run --slowest {posargs}