diff --git a/experimental/babel-preset-env/scripts/smoke-test.js b/experimental/babel-preset-env/scripts/smoke-test.js
index 9340cfaf1a..210c35bc21 100755
--- a/experimental/babel-preset-env/scripts/smoke-test.js
+++ b/experimental/babel-preset-env/scripts/smoke-test.js
@@ -13,7 +13,7 @@ try {
   execSync("npm pack");
 
   console.log("Setting up smoke test");
-  fs.ensureDir(tempFolderPath);
+  fs.ensureDirSync(tempFolderPath);
 
   fs.writeFileSync(
     path.join(tempFolderPath, "package.json"),
@@ -30,7 +30,7 @@ try {
     "babel-preset-env": "${packPath}"
   }
 }
-  `
+`
   );
 
   fs.writeFileSync(