diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/computed-keys-same-ast/output.js b/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/computed-keys-same-ast/output.js
index 03587f4c1d63..a08d2e1db86d 100644
--- a/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/computed-keys-same-ast/output.js
+++ b/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/computed-keys-same-ast/output.js
@@ -1,30 +1,31 @@
-var Foo = babelHelpers.decorate([function (_) {
-  return desc = _;
-}], function (_initialize) {
+let Foo = babelHelpers.decorate([_ => desc = _], function (_initialize) {
   "use strict";
 
-  var Foo = function Foo() {
-    "use strict";
+  class Foo {
+    constructor() {
+      _initialize(this);
+    }
 
-    babelHelpers.classCallCheck(this, Foo);
-
-    _initialize(this);
-  };
+  }
 
   return {
     F: Foo,
     d: [{
       kind: "method",
       key: getKey(),
-      value: function value() {
+
+      value() {
         return 1;
       }
+
     }, {
       kind: "method",
       key: getKey(),
-      value: function value() {
+
+      value() {
         return 2;
       }
+
     }]
   };
 });
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/computed-keys-same-value/output.js b/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/computed-keys-same-value/output.js
index 333641d3a0c7..bffa9e17a1d9 100644
--- a/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/computed-keys-same-value/output.js
+++ b/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/computed-keys-same-value/output.js
@@ -1,30 +1,31 @@
-var Foo = babelHelpers.decorate([function (_) {
-  return desc = _;
-}], function (_initialize) {
+let Foo = babelHelpers.decorate([_ => desc = _], function (_initialize) {
   "use strict";
 
-  var Foo = function Foo() {
-    "use strict";
+  class Foo {
+    constructor() {
+      _initialize(this);
+    }
 
-    babelHelpers.classCallCheck(this, Foo);
-
-    _initialize(this);
-  };
+  }
 
   return {
     F: Foo,
     d: [{
       kind: "method",
       key: getKeyI(),
-      value: function value() {
+
+      value() {
         return 1;
       }
+
     }, {
       kind: "method",
       key: getKeyJ(),
-      value: function value() {
+
+      value() {
         return 2;
       }
+
     }]
   };
 });
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/options.json b/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/options.json
index 923a925270e0..4f9b5b01d18f 100644
--- a/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/options.json
+++ b/packages/babel-plugin-proposal-decorators/test/fixtures/duplicated-keys/options.json
@@ -3,6 +3,5 @@
     ["proposal-decorators", { "decoratorsBeforeExport": false }],
     "proposal-class-properties",
     "external-helpers"
-  ],
-  "presets": ["env"]
+  ]
 }
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/element-descriptors/options.json b/packages/babel-plugin-proposal-decorators/test/fixtures/element-descriptors/options.json
index 923a925270e0..4f9b5b01d18f 100644
--- a/packages/babel-plugin-proposal-decorators/test/fixtures/element-descriptors/options.json
+++ b/packages/babel-plugin-proposal-decorators/test/fixtures/element-descriptors/options.json
@@ -3,6 +3,5 @@
     ["proposal-decorators", { "decoratorsBeforeExport": false }],
     "proposal-class-properties",
     "external-helpers"
-  ],
-  "presets": ["env"]
+  ]
 }
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/finishers/options.json b/packages/babel-plugin-proposal-decorators/test/fixtures/finishers/options.json
index 923a925270e0..4f9b5b01d18f 100644
--- a/packages/babel-plugin-proposal-decorators/test/fixtures/finishers/options.json
+++ b/packages/babel-plugin-proposal-decorators/test/fixtures/finishers/options.json
@@ -3,6 +3,5 @@
     ["proposal-decorators", { "decoratorsBeforeExport": false }],
     "proposal-class-properties",
     "external-helpers"
-  ],
-  "presets": ["env"]
+  ]
 }
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/ordering/options.json b/packages/babel-plugin-proposal-decorators/test/fixtures/ordering/options.json
index 923a925270e0..4f9b5b01d18f 100644
--- a/packages/babel-plugin-proposal-decorators/test/fixtures/ordering/options.json
+++ b/packages/babel-plugin-proposal-decorators/test/fixtures/ordering/options.json
@@ -3,6 +3,5 @@
     ["proposal-decorators", { "decoratorsBeforeExport": false }],
     "proposal-class-properties",
     "external-helpers"
-  ],
-  "presets": ["env"]
+  ]
 }