diff --git a/package.json b/package.json
index c3d2669..82317cf 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,8 @@
     "test": "mocha --opts mocha.opts",
     "pretest": "npm run build",
     "build": "rollup -c",
-    "dev": "rollup -cw"
+    "dev": "rollup -cw",
+    "prepublish": "npm test"
   },
   "repository": "https://github.com/sveltejs/sapper",
   "keywords": [