Make build break for flake8 errors on tests dir (aimacode#363)

lucasmoura · norvig · commit ff6f2f76a059 · 2017-03-18T00:58:25.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -14,6 +14,7 @@ install:
   - pip install -r requirements.txt
 
 script:
+  - flake8 tests/
   - py.test
   - python -m doctest -v *.py
 
