diff --git a/js/package.json b/js/package.json
index dca0e0e6d..e52a4650a 100644
--- a/js/package.json
+++ b/js/package.json
@@ -43,7 +43,7 @@
     "test": "mocha 'src/**/*.spec.js'",
     "test:coverage": "istanbul cover _mocha -- 'src/**/*.spec.js'",
     "test:e2e": "mocha 'src/**/*.e2e.js'",
-    "test:npm": "node test/npmLibrary",
+    "test:npm": "(cd .npmjs && npm i) && node test/npmLibrary",
     "prepush": "npm run lint:cached"
   },
   "devDependencies": {