diff --git a/.travis.yml b/.travis.yml
index a8b0451..b4ac3a7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,8 @@
 language: node_js
 node_js:
   - "6"
+env:
+- NODE_ENV=development
 before_install:
 - npm i -g npm
 - npm i -g greenkeeper-lockfile@1