diff --git a/.travis.yml b/.travis.yml
index dc7f699e..b72b704d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,9 @@ env:
   matrix:
     - USE_SQLALCHEMY=true
     - USE_SQLALCHEMY=false
+    - USE_YAML=1
+    - USE_YAML=0
+
 python:
 - '2.7.11'
 - '3.5'