diff --git a/crates/swc/tests/fixture/issues-1xxx/1402/case1/output/index.ts b/crates/swc/tests/fixture/issues-1xxx/1402/case1/output/index.ts
index dda230d06d28..11f3f0383c46 100644
--- a/crates/swc/tests/fixture/issues-1xxx/1402/case1/output/index.ts
+++ b/crates/swc/tests/fixture/issues-1xxx/1402/case1/output/index.ts
@@ -1,6 +1,6 @@
 var e = 1;
 try {
     throw 2;
-} catch (e1) {
+} catch  {
     console.log(e);
 }
diff --git a/crates/swc/tests/fixture/issues-1xxx/1448/case1/output/index.ts b/crates/swc/tests/fixture/issues-1xxx/1448/case1/output/index.ts
index 9694556cf46b..c83f9e21883a 100644
--- a/crates/swc/tests/fixture/issues-1xxx/1448/case1/output/index.ts
+++ b/crates/swc/tests/fixture/issues-1xxx/1448/case1/output/index.ts
@@ -1,4 +1,4 @@
 import { createRequire as _createRequire } from "module";
-var __require = _createRequire(import.meta.url);
-var F = __require("yaml");
+const __require = _createRequire(import.meta.url);
+const F = __require("yaml");
 console.log(F);
diff --git a/crates/swc/tests/fixture/issues-1xxx/1568/case1/output/index.ts b/crates/swc/tests/fixture/issues-1xxx/1568/case1/output/index.ts
index a138f7f9c593..01d3e8e0edad 100644
--- a/crates/swc/tests/fixture/issues-1xxx/1568/case1/output/index.ts
+++ b/crates/swc/tests/fixture/issues-1xxx/1568/case1/output/index.ts
@@ -4,9 +4,7 @@ Object.defineProperty(exports, "__esModule", {
 });
 Object.defineProperty(exports, "default", {
     enumerable: true,
-    get: function() {
-        return get;
-    }
+    get: ()=>get
 });
 function get(key) {
     console.log(key);
diff --git a/crates/swc/tests/fixture/issues-1xxx/1714/case1/output/index.js b/crates/swc/tests/fixture/issues-1xxx/1714/case1/output/index.js
index a81d8749ac19..48f220be6542 100644
--- a/crates/swc/tests/fixture/issues-1xxx/1714/case1/output/index.js
+++ b/crates/swc/tests/fixture/issues-1xxx/1714/case1/output/index.js
@@ -4,10 +4,8 @@ Object.defineProperty(exports, "__esModule", {
 });
 Object.defineProperty(exports, "render", {
     enumerable: true,
-    get: function() {
-        return _customRender.customRender;
-    }
+    get: ()=>_customRender.customRender
 });
-var _exportStar = require("@swc/helpers/lib/_export_star.js").default;
-var _customRender = require("./customRender");
+const _exportStar = require("@swc/helpers/lib/_export_star.js").default;
+const _customRender = require("./customRender");
 _exportStar(require("@testing-library/react"), exports);
diff --git a/crates/swc/tests/fixture/issues-1xxx/1721/case1/output/index.js b/crates/swc/tests/fixture/issues-1xxx/1721/case1/output/index.js
index 4818a3b65699..d34a8d3f0bbd 100644
--- a/crates/swc/tests/fixture/issues-1xxx/1721/case1/output/index.js
+++ b/crates/swc/tests/fixture/issues-1xxx/1721/case1/output/index.js
@@ -1,129 +1,10 @@
-import _async_iterator from "@swc/helpers/src/_async_iterator.mjs";
-import _async_to_generator from "@swc/helpers/src/_async_to_generator.mjs";
-import _wrap_async_generator from "@swc/helpers/src/_wrap_async_generator.mjs";
-import _ts_generator from "@swc/helpers/src/_ts_generator.mjs";
-function lol() {
-    return _lol.apply(this, arguments);
-}
-function _lol() {
-    _lol = _wrap_async_generator(function() {
-        return _ts_generator(this, function(_state) {
-            switch(_state.label){
-                case 0:
-                    return [
-                        4,
-                        1
-                    ];
-                case 1:
-                    _state.sent();
-                    return [
-                        4,
-                        2
-                    ];
-                case 2:
-                    _state.sent();
-                    return [
-                        2
-                    ];
-            }
-        });
-    });
-    return _lol.apply(this, arguments);
-}
-function main() {
-    return _main.apply(this, arguments);
-}
-function _main() {
-    _main = _async_to_generator(function() {
-        var _iteratorAbruptCompletion, _didIteratorError, _iteratorError, _iterator, _step, _value, x, err;
-        return _ts_generator(this, function(_state) {
-            switch(_state.label){
-                case 0:
-                    _iteratorAbruptCompletion = false, _didIteratorError = false;
-                    _state.label = 1;
-                case 1:
-                    _state.trys.push([
-                        1,
-                        6,
-                        7,
-                        12
-                    ]);
-                    _iterator = _async_iterator(lol());
-                    _state.label = 2;
-                case 2:
-                    return [
-                        4,
-                        _iterator.next()
-                    ];
-                case 3:
-                    if (!(_iteratorAbruptCompletion = !(_step = _state.sent()).done)) return [
-                        3,
-                        5
-                    ];
-                    _value = _step.value;
-                    x = _value;
-                    console.log(x);
-                    _state.label = 4;
-                case 4:
-                    _iteratorAbruptCompletion = false;
-                    return [
-                        3,
-                        2
-                    ];
-                case 5:
-                    return [
-                        3,
-                        12
-                    ];
-                case 6:
-                    err = _state.sent();
-                    _didIteratorError = true;
-                    _iteratorError = err;
-                    return [
-                        3,
-                        12
-                    ];
-                case 7:
-                    _state.trys.push([
-                        7,
-                        ,
-                        10,
-                        11
-                    ]);
-                    if (!(_iteratorAbruptCompletion && _iterator.return != null)) return [
-                        3,
-                        9
-                    ];
-                    return [
-                        4,
-                        _iterator.return()
-                    ];
-                case 8:
-                    _state.sent();
-                    _state.label = 9;
-                case 9:
-                    return [
-                        3,
-                        11
-                    ];
-                case 10:
-                    if (_didIteratorError) {
-                        throw _iteratorError;
-                    }
-                    return [
-                        7
-                    ];
-                case 11:
-                    return [
-                        7
-                    ];
-                case 12:
-                    return [
-                        2
-                    ];
-            }
-        });
-    });
-    return _main.apply(this, arguments);
+async function* lol() {
+    yield 1;
+    yield 2;
+}
+async function main() {
+    for await (const x of lol()){
+        console.log(x);
+    }
 }
 main();
diff --git a/crates/swc/tests/fixture/issues-1xxx/1722/case1/output/index.js b/crates/swc/tests/fixture/issues-1xxx/1722/case1/output/index.js
index f97ff32dfe95..db896fdbfabb 100644
--- a/crates/swc/tests/fixture/issues-1xxx/1722/case1/output/index.js
+++ b/crates/swc/tests/fixture/issues-1xxx/1722/case1/output/index.js
@@ -1,16 +1,3 @@
-import _async_to_generator from "@swc/helpers/src/_async_to_generator.mjs";
-import _ts_generator from "@swc/helpers/src/_ts_generator.mjs";
-(function() {
-    var _main = _async_to_generator(function() {
-        return _ts_generator(this, function(_state) {
-            console.log(1);
-            return [
-                2
-            ];
-        });
-    });
-    function main() {
-        return _main.apply(this, arguments);
-    }
-    return main;
-})()();
+(async function main() {
+    console.log(1);
+})();
diff --git a/crates/swc/tests/fixture/issues-2xxx/2154/case1/output/index.js b/crates/swc/tests/fixture/issues-2xxx/2154/case1/output/index.js
index 642ef4f89948..644e5fc459ea 100644
--- a/crates/swc/tests/fixture/issues-2xxx/2154/case1/output/index.js
+++ b/crates/swc/tests/fixture/issues-2xxx/2154/case1/output/index.js
@@ -1,4 +1,4 @@
-var c = /*#__PURE__*/ React.createElement("img", {
+const c = /*#__PURE__*/ React.createElement("img", {
     alt: "caf\xe9"
 }).props.alt;
 console.log(c);
diff --git a/crates/swc/tests/fixture/shopify/003-env/output/index.js b/crates/swc/tests/fixture/shopify/003-env/output/index.js
index a7974d80c5b6..2eafd6f5b2a1 100644
--- a/crates/swc/tests/fixture/shopify/003-env/output/index.js
+++ b/crates/swc/tests/fixture/shopify/003-env/output/index.js
@@ -4,15 +4,12 @@ Object.defineProperty(exports, "__esModule", {
 });
 Object.defineProperty(exports, "App", {
     enumerable: true,
-    get: function() {
-        return App;
-    }
+    get: ()=>App
 });
-var _interopRequireDefault = require("@swc/helpers/lib/_interop_require_default.js").default;
-var _slicedToArray = require("@swc/helpers/lib/_sliced_to_array.js").default;
-var _react = /*#__PURE__*/ _interopRequireDefault(require("react"));
-var _reactI18N = require("@shopify/react-i18n");
+const _interopRequireDefault = require("@swc/helpers/lib/_interop_require_default.js").default;
+const _react = /*#__PURE__*/ _interopRequireDefault(require("react"));
+const _reactI18N = require("@shopify/react-i18n");
 function App() {
-    var _useI18n = _slicedToArray((0, _reactI18N.useI18n)(), 1), i18n = _useI18n[0];
+    const [i18n] = (0, _reactI18N.useI18n)();
     return /*#__PURE__*/ _react.default.createElement("h1", null, i18n.translate("foo"));
 }
diff --git a/crates/swc/tests/fixture/shopify/004-jest/output/index.js b/crates/swc/tests/fixture/shopify/004-jest/output/index.js
index a7974d80c5b6..2eafd6f5b2a1 100644
--- a/crates/swc/tests/fixture/shopify/004-jest/output/index.js
+++ b/crates/swc/tests/fixture/shopify/004-jest/output/index.js
@@ -4,15 +4,12 @@ Object.defineProperty(exports, "__esModule", {
 });
 Object.defineProperty(exports, "App", {
     enumerable: true,
-    get: function() {
-        return App;
-    }
+    get: ()=>App
 });
-var _interopRequireDefault = require("@swc/helpers/lib/_interop_require_default.js").default;
-var _slicedToArray = require("@swc/helpers/lib/_sliced_to_array.js").default;
-var _react = /*#__PURE__*/ _interopRequireDefault(require("react"));
-var _reactI18N = require("@shopify/react-i18n");
+const _interopRequireDefault = require("@swc/helpers/lib/_interop_require_default.js").default;
+const _react = /*#__PURE__*/ _interopRequireDefault(require("react"));
+const _reactI18N = require("@shopify/react-i18n");
 function App() {
-    var _useI18n = _slicedToArray((0, _reactI18N.useI18n)(), 1), i18n = _useI18n[0];
+    const [i18n] = (0, _reactI18N.useI18n)();
     return /*#__PURE__*/ _react.default.createElement("h1", null, i18n.translate("foo"));
 }
diff --git a/crates/swc/tests/fixture/shopify/005-no-module/output/index.js b/crates/swc/tests/fixture/shopify/005-no-module/output/index.js
index 2bc9aab67943..fbe16db1b695 100644
--- a/crates/swc/tests/fixture/shopify/005-no-module/output/index.js
+++ b/crates/swc/tests/fixture/shopify/005-no-module/output/index.js
@@ -1,7 +1,6 @@
-import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import React from "react";
 import { useI18n } from "@shopify/react-i18n";
 export function App() {
-    var _useI18n = _sliced_to_array(useI18n(), 1), i18n = _useI18n[0];
+    const [i18n] = useI18n();
     return /*#__PURE__*/ React.createElement("h1", null, i18n.translate("foo"));
 }