diff --git a/.travis.yml b/.travis.yml
index cdb1c751e9..ce6b62d850 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,6 +13,7 @@ python:
 
 script:
     - python coins-check.py
+    - cd defs/coins && python combine.py
 
 notifications:
   webhooks: