1 files changed, 1 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index e1d97c4..5cf02a6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,6 +7,7 @@ envlist = py27,py34,flake8
 skip_missing_interpreters = True
 
 [testenv]
+usedevelop = True
 changedir = tests
 commands =
     py.test {posargs}