diff --git a/.travis.yml b/.travis.yml
index 7d50a928e6..26bbf78c71 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -35,7 +35,7 @@ cache:
 
 jobs:
   include:
-    - script: npm start test.node
+    - script: COVERAGE=1 npm start test.node
 notifications:
   email: false
   urls: