diff --git a/.travis.yml b/.travis.yml
index 3439610..4517be6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@ python:
 - '3.5'
 install:
 - pip install -r requirements.txt
+- pip install -r requirements_dev.txt
 script:
 - python -m unittest discover
 notifications: