diff --git a/tox.ini b/tox.ini
index be720ca..82239c0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,14 +5,13 @@ envlist = py27,py33,py34,py35,pypy,pep8,docs
 
 [testenv]
 deps = .[testing]
-usedevelop = True
-commands = py.test wsgi_intercept/tests
+commands = py.test --tb=short wsgi_intercept/tests
 passenv = WSGI_INTERCEPT_*
 
 [testenv:pep8]
 deps = flake8
 commands =
-    flake8
+    flake8 wsgi_intercept
 
 [testenv:docs]
 deps = .[docs,testing]