diff --git a/circle.yml b/circle.yml
index a838496..0762842 100644
--- a/circle.yml
+++ b/circle.yml
@@ -3,8 +3,6 @@ machine:
     version: 3.5.1
   node:
     version: 5.11.1
-  environment:
-    NODE_ENV: production
 
 dependencies:
   pre:
@@ -12,6 +10,7 @@ dependencies:
 
 test:
   override:
+    - export NODE_ENV=production
     - make build
     - make test