diff --git a/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/4943/output.js b/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/4943/output.js
index 471233145afc..036d4585a2eb 100644
--- a/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/4943/output.js
+++ b/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/4943/output.js
@@ -7,11 +7,13 @@ function foo(_x) {
   return _foo.apply(this, arguments);
 }
 function _foo() {
-  _foo = babelHelpers.asyncToGenerator(function* (_ref) {
+  _foo = babelHelpers.asyncToGenerator(function (_ref) {
     let a = _ref.a,
       _ref$b = _ref.b,
       b = _ref$b === void 0 ? mandatory("b") : _ref$b;
-    return Promise.resolve(b);
+    return function* () {
+      return Promise.resolve(b);
+    }();
   });
   return _foo.apply(this, arguments);
 }