diff --git a/tox.ini b/tox.ini
index 157c0c217..b97460c73 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,4 +9,4 @@ envlist = py26, py27
 [testenv]
 commands =
     pip install --use-mirrors -r .travis/requirements-latest.txt
-    trial scrapy
+    trial {posargs:scrapy}