diff --git a/.travis.yml b/.travis.yml
index 669c6ba..56ff169 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,5 +5,7 @@ python:
   - "3.4"
 before_install:
   - sudo apt-get update -qq
+install:
   - sudo apt-get install -qq realpath
+  - pip install flake8
 script: ./test.sh