diff --git a/test/tree/package.json b/test/tree/package.json
index 6826810e73e..1a3b32d627d 100644
--- a/test/tree/package.json
+++ b/test/tree/package.json
@@ -3,11 +3,11 @@
   "version": "1.0.0",
   "main": "index.js",
   "license": "MIT",
-  "dependencies": {
+  "devDependencies": {
     "koa": "^2.5.1",
     "koa-mount": "^3.0.0",
     "koa-route": "^3.2.0",
     "koa-static": "^5.0.0",
     "mz": "^2.7.0"
   }
-}
+}
\ No newline at end of file