1 files changed, 1 insertions, 0 deletions
diff --git a/tox.ini b/tox.ini
index 0a157c2..58631d3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,6 +2,7 @@
 envlist = py26,py27,py33,pypy,pep8
 
 [testenv]
+install_command = pip install -U {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
          LANG=en_US.UTF-8
          LANGUAGE=en_US:en