diff --git a/tox.ini b/tox.ini
index 16a6e89..4682314 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,11 +3,7 @@ minversion = 1.6
 envlist = pep8
 
 [testenv]
-usedevelop = True
-install_command = pip install -U {opts} {packages}
 deps = -r{toxinidir}/test-requirements.txt
-setenv = VIRTUAL_ENV={envdir}
-sitepackages = False
 downloadcache = {toxworkdir}/_download
 
 [testenv:pep8]