diff --git a/.travis.yml b/.travis.yml
index f36a5d81..ca618d45 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,8 @@ python:
   - "2.7"
   - "3.6"
 # command to install dependencies
-install: "pip install -r requirements.txt"
+install: 
+  - "pip install -r requirements.txt"
+  - "pip install pep8"
 # command to run tests
-script: pytest
+script: pep8 samples/*