diff --git a/.travis.yml b/.travis.yml
index 66c82f6a..ec9c40a9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,9 +20,10 @@ addons:
   apt:
     packages:
       - xvfb
+      - python3-matplotlib
 
 env:
-  - PYTHON = "" MPLBACKEND = "agg"
+  - PYTHON = python3 MPLBACKEND = "agg"
 
 notifications:
   email: true