diff --git a/README.md b/README.md
index a114d2e..9b29372 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ case it'll be:
   ...
   "scripts": {
     ...
-    "test": "PORT=9999 NODE_ENV=test mocha -R spec -b --recursive"
+    "test": "set PORT=9999 && set NODE_ENV=test && mocha -R spec -b --recursive"
   },
   ...
 ```