diff --git a/tox.ini b/tox.ini
index 8eb3cd1..fedffa8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,9 @@
 [tox]
 envlist = pyflakes, pep8, py27
 
+[testenv]
+install_command = pip install --allow-external lazr.authentication --allow-insecure lazr.authentication -U {opts} {packages}
+
 [testenv:pyflakes]
 deps = pyflakes
 commands = pyflakes setup.py reviewday bin