diff --git a/tox.ini b/tox.ini
index b33a86d44..2943c7561 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,7 +18,7 @@ deps =
        -r{toxinidir}/test-requirements.txt
 commands =
   find . -type f -name "*.pyc" -delete
-  stestr run '{posargs}'
+  stestr run {posargs}
   stestr slowest
 
 [testenv:debug]
@@ -74,7 +74,7 @@ setenv =
 passenv = OS_*
 commands =
   {envdir}/bin/python setup.py install
-  stestr run '{posargs}'
+  stestr run {posargs}
 
 [testenv:genconfig]
 basepython = python3