diff --git a/test/core/fixtures/transformation/api/blacklist/expected.js b/test/core/fixtures/transformation/api/blacklist/expected.js
index 934fea14ff..54c0233ca3 100644
--- a/test/core/fixtures/transformation/api/blacklist/expected.js
+++ b/test/core/fixtures/transformation/api/blacklist/expected.js
@@ -1,6 +1,6 @@
 "use strict";
 
-var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
 var Test = function Test() {
   _classCallCheck(this, Test);
diff --git a/test/core/fixtures/transformation/es6.modules-ignore/exports-default/expected.js b/test/core/fixtures/transformation/es6.modules-ignore/exports-default/expected.js
index 2c09a5b8b6..243f60206b 100644
--- a/test/core/fixtures/transformation/es6.modules-ignore/exports-default/expected.js
+++ b/test/core/fixtures/transformation/es6.modules-ignore/exports-default/expected.js
@@ -1,6 +1,6 @@
 "use strict";
 
-var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
 var _default = (function () {
   var _class = function _default() {
diff --git a/test/core/fixtures/transformation/es6.modules-ignore/exports-variable/expected.js b/test/core/fixtures/transformation/es6.modules-ignore/exports-variable/expected.js
index 5231f638e6..8f6bdc258b 100644
--- a/test/core/fixtures/transformation/es6.modules-ignore/exports-variable/expected.js
+++ b/test/core/fixtures/transformation/es6.modules-ignore/exports-variable/expected.js
@@ -1,6 +1,6 @@
 "use strict";
 
-var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
 var foo = 1;
 var foo = 1,
diff --git a/test/core/fixtures/transformation/es6.modules-system/exports-default/expected.js b/test/core/fixtures/transformation/es6.modules-system/exports-default/expected.js
index e55e897b43..453baf6142 100644
--- a/test/core/fixtures/transformation/es6.modules-system/exports-default/expected.js
+++ b/test/core/fixtures/transformation/es6.modules-system/exports-default/expected.js
@@ -1,10 +1,10 @@
 System.register([], function (_export) {
   var _default, Foo;
 
-  var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
-
   _export("default", foo);
 
+  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
   function foo() {}
 
   return {
diff --git a/test/core/fixtures/transformation/es6.modules-system/exports-variable/expected.js b/test/core/fixtures/transformation/es6.modules-system/exports-variable/expected.js
index 6b0a9eb768..c5ab473b75 100644
--- a/test/core/fixtures/transformation/es6.modules-system/exports-variable/expected.js
+++ b/test/core/fixtures/transformation/es6.modules-system/exports-variable/expected.js
@@ -1,10 +1,10 @@
 System.register([], function (_export) {
   var foo, foo2, foo3, foo4, foo5, foo6, foo8;
 
-  var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
-
   _export("foo7", foo7);
 
+  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
   function foo7() {}
 
   return {
diff --git a/test/core/fixtures/transformation/es6.template-literals/tag-loose/expected.js b/test/core/fixtures/transformation/es6.template-literals/tag-loose/expected.js
index 2a42c708b7..a2264017ba 100644
--- a/test/core/fixtures/transformation/es6.template-literals/tag-loose/expected.js
+++ b/test/core/fixtures/transformation/es6.template-literals/tag-loose/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _taggedTemplateLiteralLoose = function (strings, raw) { strings.raw = raw; return strings; };
+function _taggedTemplateLiteralLoose(strings, raw) { strings.raw = raw; return strings; }
 
 var foo = bar(_taggedTemplateLiteralLoose(["wow\na", "b ", ""], ["wow\\na", "b ", ""]), 42, _.foobar());
\ No newline at end of file
diff --git a/test/core/fixtures/transformation/es6.template-literals/tag/expected.js b/test/core/fixtures/transformation/es6.template-literals/tag/expected.js
index d572423296..db7bc65355 100644
--- a/test/core/fixtures/transformation/es6.template-literals/tag/expected.js
+++ b/test/core/fixtures/transformation/es6.template-literals/tag/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _taggedTemplateLiteral = function (strings, raw) { return Object.freeze(Object.defineProperties(strings, { raw: { value: Object.freeze(raw) } })); };
+function _taggedTemplateLiteral(strings, raw) { return Object.freeze(Object.defineProperties(strings, { raw: { value: Object.freeze(raw) } })); }
 
 var foo = bar(_taggedTemplateLiteral(["wow\na", "b ", ""], ["wow\\na", "b ", ""]), 42, _.foobar());
\ No newline at end of file
diff --git a/test/core/fixtures/transformation/spec.proto-to-assign/assignment-expression/expected.js b/test/core/fixtures/transformation/spec.proto-to-assign/assignment-expression/expected.js
index 8efad04c17..1a55265b4c 100644
--- a/test/core/fixtures/transformation/spec.proto-to-assign/assignment-expression/expected.js
+++ b/test/core/fixtures/transformation/spec.proto-to-assign/assignment-expression/expected.js
@@ -1,6 +1,6 @@
 "use strict";
 
-var _defaults = function (obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; };
+function _defaults(obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; }
 
 var _foo, _foo$bar, _foo$bar2;
 
diff --git a/test/core/fixtures/transformation/spec.proto-to-assign/assignment-statement/expected.js b/test/core/fixtures/transformation/spec.proto-to-assign/assignment-statement/expected.js
index b4529baf22..29606945ba 100644
--- a/test/core/fixtures/transformation/spec.proto-to-assign/assignment-statement/expected.js
+++ b/test/core/fixtures/transformation/spec.proto-to-assign/assignment-statement/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _defaults = function (obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; };
+function _defaults(obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; }
 
 _defaults(obj, bar);
\ No newline at end of file
diff --git a/test/core/fixtures/transformation/spec.proto-to-assign/class/expected.js b/test/core/fixtures/transformation/spec.proto-to-assign/class/expected.js
index 24e3490941..51c77f4361 100644
--- a/test/core/fixtures/transformation/spec.proto-to-assign/class/expected.js
+++ b/test/core/fixtures/transformation/spec.proto-to-assign/class/expected.js
@@ -1,10 +1,10 @@
 "use strict";
 
-var _defaults = function (obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; };
+function _defaults(obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; }
 
-var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
-var _inherits = function (subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) _defaults(subClass, superClass); };
+function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) _defaults(subClass, superClass); }
 
 var Foo = (function (_Bar) {
   function Foo() {
@@ -18,4 +18,4 @@ var Foo = (function (_Bar) {
   _inherits(Foo, _Bar);
 
   return Foo;
-})(Bar);
+})(Bar);
\ No newline at end of file