diff --git a/tox.ini b/tox.ini
index 26c02efb..ff28d6e0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,7 +27,7 @@ setenv =
     {[testenv]setenv}
     PYTHON=coverage run --source panko --parallel-mode
 commands =
-    stestr run '{posargs}'
+    stestr run {posargs}
     coverage combine
     coverage html -d cover
     coverage xml -o cover/coverage.xml