diff --git a/.travis.yml b/.travis.yml
index a7dc8f1d..ad0a4fd1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,8 @@ python:
   - "3.6"
 # command to install dependencies
 install: 
-  - "pip install -r requirements.txt"
-  - "pip install pycodestyle"
+  - pip install -r requirements.txt
+  - pip install -r test-requirements.txt
+  - pip install pycodestyle
 # command to run tests
 script: pycodestyle samples/*