diff --git a/tox.ini b/tox.ini
index a16b80ed..2399e24d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,10 +3,9 @@ skipsdist = true
 envlist = py36
 
 [testenv]
-passenv = LC_ALL, LANG, HOME
 deps =
     binaryornot
     flake8==2.5.5
     pytest-cookies
     sh
-commands = py.test {posargs:tests}
+commands = pytest {posargs:./tests}