diff --git a/tests/baselines/reference/decoratedDefaultExportsGetExportedAmd.js b/tests/baselines/reference/decoratedDefaultExportsGetExportedAmd.js
index 441d8b0d70a..3fb23375f02 100644
--- a/tests/baselines/reference/decoratedDefaultExportsGetExportedAmd.js
+++ b/tests/baselines/reference/decoratedDefaultExportsGetExportedAmd.js
@@ -14,6 +14,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
     return c > 3 && r && Object.defineProperty(target, key, r), r;
 };
 define(["require", "exports"], function (require, exports) {
+    "use strict";
     var decorator;
     let Foo = class {
     };
diff --git a/tests/baselines/reference/decoratedDefaultExportsGetExportedCommonjs.js b/tests/baselines/reference/decoratedDefaultExportsGetExportedCommonjs.js
index 8818241c9b5..32acfbbea39 100644
--- a/tests/baselines/reference/decoratedDefaultExportsGetExportedCommonjs.js
+++ b/tests/baselines/reference/decoratedDefaultExportsGetExportedCommonjs.js
@@ -7,6 +7,7 @@ export default class Foo {}
 
 
 //// [decoratedDefaultExportsGetExportedCommonjs.js]
+"use strict";
 var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
     var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
     if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
diff --git a/tests/baselines/reference/decoratedDefaultExportsGetExportedSystem.js b/tests/baselines/reference/decoratedDefaultExportsGetExportedSystem.js
index 1ae54560ae3..a2b22e4ccdb 100644
--- a/tests/baselines/reference/decoratedDefaultExportsGetExportedSystem.js
+++ b/tests/baselines/reference/decoratedDefaultExportsGetExportedSystem.js
@@ -8,6 +8,7 @@ export default class Foo {}
 
 //// [decoratedDefaultExportsGetExportedSystem.js]
 System.register([], function(exports_1) {
+    "use strict";
     var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
         var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
         if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
diff --git a/tests/baselines/reference/decoratedDefaultExportsGetExportedUmd.js b/tests/baselines/reference/decoratedDefaultExportsGetExportedUmd.js
index 118af702fc1..06cee476b57 100644
--- a/tests/baselines/reference/decoratedDefaultExportsGetExportedUmd.js
+++ b/tests/baselines/reference/decoratedDefaultExportsGetExportedUmd.js
@@ -21,6 +21,7 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
         define(["require", "exports"], factory);
     }
 })(function (require, exports) {
+    "use strict";
     var decorator;
     let Foo = class {
     };
diff --git a/tests/baselines/reference/defaultExportsGetExportedAmd.js b/tests/baselines/reference/defaultExportsGetExportedAmd.js
index 4eba3ba9600..b9387a2cc84 100644
--- a/tests/baselines/reference/defaultExportsGetExportedAmd.js
+++ b/tests/baselines/reference/defaultExportsGetExportedAmd.js
@@ -4,6 +4,7 @@ export default class Foo {}
 
 //// [defaultExportsGetExportedAmd.js]
 define(["require", "exports"], function (require, exports) {
+    "use strict";
     class Foo {
     }
     exports.default = Foo;
diff --git a/tests/baselines/reference/defaultExportsGetExportedCommonjs.js b/tests/baselines/reference/defaultExportsGetExportedCommonjs.js
index a19b99fe9d3..28301251efc 100644
--- a/tests/baselines/reference/defaultExportsGetExportedCommonjs.js
+++ b/tests/baselines/reference/defaultExportsGetExportedCommonjs.js
@@ -3,6 +3,7 @@ export default class Foo {}
 
 
 //// [defaultExportsGetExportedCommonjs.js]
+"use strict";
 class Foo {
 }
 exports.default = Foo;
diff --git a/tests/baselines/reference/defaultExportsGetExportedSystem.js b/tests/baselines/reference/defaultExportsGetExportedSystem.js
index 1f1a7c9dea6..7d5c6ee2854 100644
--- a/tests/baselines/reference/defaultExportsGetExportedSystem.js
+++ b/tests/baselines/reference/defaultExportsGetExportedSystem.js
@@ -4,6 +4,7 @@ export default class Foo {}
 
 //// [defaultExportsGetExportedSystem.js]
 System.register([], function(exports_1) {
+    "use strict";
     var Foo;
     return {
         setters:[],
diff --git a/tests/baselines/reference/defaultExportsGetExportedUmd.js b/tests/baselines/reference/defaultExportsGetExportedUmd.js
index ed3639ace55..902fc89c1d4 100644
--- a/tests/baselines/reference/defaultExportsGetExportedUmd.js
+++ b/tests/baselines/reference/defaultExportsGetExportedUmd.js
@@ -11,6 +11,7 @@ export default class Foo {}
         define(["require", "exports"], factory);
     }
 })(function (require, exports) {
+    "use strict";
     class Foo {
     }
     exports.default = Foo;