diff --git a/tox.ini b/tox.ini
index 7a72d1b..72b60f0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,7 @@ setenv =
     OS_TEST_PATH = ./freezerclient/tests/unit
 commands =
     find . -type f -name "*.py[c|o]" -delete
-    stestr run '{posargs}'
+    stestr run {posargs}
     coverage combine
     coverage html -d cover
     coverage xml -o cover/coverage.xml