diff --git a/tox.ini b/tox.ini
index 348bdd1..5701ef7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,6 +5,6 @@ envlist=
     py35
 
 [testenv]
-commands=py.test --tb native {posargs:tests}
+commands=py.test --tb native {posargs:.}
 deps =
     -r{toxinidir}/requirements-dev.txt