diff --git a/test-requirements.txt b/test-requirements.txt
index f9f2bac..763ba14 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,3 +1,4 @@
 pep8>=1.4.5,<=1.5.7
 pyflakes>=0.7.3
 flake8>=2.1.0
+pip>=6.1.1