diff --git a/tox.ini b/tox.ini
index f9e487e50e..5d9c814d11 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,7 +22,7 @@ setenv =
 basepython = python3
 deps = -r{toxinidir}/test-requirements.txt
 commands =
-    stestr run '{posargs}'
+    stestr run {posargs}
     coverage combine
     coverage html -d cover
     coverage xml -o cover/coverage.xml