diff --git a/.travis.yml b/.travis.yml
index 4bb542fe..b700f5fd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,7 @@ script:
   - 'if [ "$NODE7" = "true" ]; then yarn run lint; fi'
   - 'if [ "$NODE7" = "true" ]; then yarn run coverage; fi'
   - 'if [ "$NODE6" = "true" ]; then yarn run test-node6-transformer; fi'
+  - 'if [ "$NODE6" = "true" ]; then yarn run build; fi'
   - 'if [ "$NODE6" = "true" ]; then yarn run unit-node6; fi'
 jobs:
   include: