diff --git a/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/13801/output.js b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/13801/output.js
index e4528efb9cb4..1c547bd69746 100644
--- a/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/13801/output.js
+++ b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/13801/output.js
@@ -1,4 +1,6 @@
-function _asyncIterator(iterable) { var method; if (typeof Symbol !== "undefined") { if (Symbol.asyncIterator) method = iterable[Symbol.asyncIterator]; if (method == null && Symbol.iterator) method = iterable[Symbol.iterator]; } if (method == null) method = iterable["@@asyncIterator"]; if (method == null) method = iterable["@@iterator"]; if (method == null) throw new TypeError("Object is not async iterable"); return method.call(iterable); }
+function _asyncIterator(iterable) { var method, async, sync, retry = 2; if (typeof Symbol !== "undefined") { async = Symbol.asyncIterator; sync = Symbol.iterator; } while (retry--) { if (async && (method = iterable[async]) != null) { return method.call(iterable); } if (sync && (method = iterable[sync]) != null) { return new AsyncFromSyncIterator(method.call(iterable)); } async = "@@asyncIterator"; sync = "@@iterator"; } throw new TypeError("Object is not async iterable"); }
+
+function AsyncFromSyncIterator(s) { AsyncFromSyncIterator = function (s) { this.s = s; this.n = s.next; }; AsyncFromSyncIterator.prototype = { s: null, n: null, next: function () { return AsyncFromSyncIteratorContinuation(this.n.apply(this.s, arguments)); }, return: function (value) { var ret = this.s.return; if (ret === undefined) { return Promise.resolve({ value: value, done: true }); } return AsyncFromSyncIteratorContinuation(ret.apply(this.s, arguments)); }, throw: function (value) { var thr = this.s.return; if (thr === undefined) return Promise.reject(value); return AsyncFromSyncIteratorContinuation(thr.apply(this.s, arguments)); } }; function AsyncFromSyncIteratorContinuation(r) { if (Object(r) !== r) { return Promise.reject(new TypeError(r + " is not an object.")); } var done = r.done; return Promise.resolve(r.value).then(function (value) { return { value: value, done: done }; }); } return new AsyncFromSyncIterator(s); }
 
 function main() {
   var one;