diff --git a/tox.ini b/tox.ini
index 8f10b15..7971dc7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,5 +11,6 @@ deps=
 
 changedir=test
 commands=
-    c: python -c 'from msgpack import _packer, _unpacker' && py.test
+    c: python -c 'from msgpack import _packer, _unpacker'
+    c: py.test
     pure: py.test