diff --git a/.travis.yml b/.travis.yml
index 8e8ebe5..fbd9c82 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,7 @@ python:
   - "3.5"
 
 addons:
+  postgresql: "9.6"
   apt:
     packages:
       - expect-dev  # provides unbuffer utility