diff --git a/tox.ini b/tox.ini
index e4539d45..f4783f74 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,4 +4,4 @@ envlist=py27,py34,py35,py36,py37
 [testenv]
 changedir=pytests
 deps=-rtest_requirements.txt
-commands=pytest
+commands=pytest -vv {posargs:}