diff --git a/packages/babel-cli/src/babel-doctor/rules/npm-3.js b/packages/babel-cli/src/babel-doctor/rules/npm-3.js
index ba2c4c44c0..e159816f39 100644
--- a/packages/babel-cli/src/babel-doctor/rules/npm-3.js
+++ b/packages/babel-cli/src/babel-doctor/rules/npm-3.js
@@ -6,7 +6,7 @@ export default function () {
     binVersionCheck("npm", ">=3.3.0", function (err) {
       if (err) {
         let message = `Your npm version is outdated. Upgrade to the latest version by running:\n$ ${chalk.magenta("npm install -g npm")}.`;
-        if (process.platform === 'win32') {
+        if (process.platform === "win32") {
           message += ` See this guide if you are having trouble upgrading: ${chalk.underline.blue("https://github.com/npm/npm/wiki/Troubleshooting#upgrading-on-windows")}`;
         }
         resolve([false, message]);