diff --git a/tests/baselines/reference/APISample_compile.js b/tests/baselines/reference/APISample_compile.js
index b7b55900281..c2617b2a6c6 100644
--- a/tests/baselines/reference/APISample_compile.js
+++ b/tests/baselines/reference/APISample_compile.js
@@ -34,12 +34,12 @@ compile(process.argv.slice(2), {
 });
 
 //// [APISample_compile.js]
+"use strict";
 /*
  * Note: This test is a public API sample. The sample sources can be found
          at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
-"use strict";
 exports.__esModule = true;
 var ts = require("typescript");
 function compile(fileNames, options) {
diff --git a/tests/baselines/reference/APISample_linter.js b/tests/baselines/reference/APISample_linter.js
index 02676c467bd..51b208c39c9 100644
--- a/tests/baselines/reference/APISample_linter.js
+++ b/tests/baselines/reference/APISample_linter.js
@@ -64,12 +64,12 @@ fileNames.forEach(fileName => {
 });
 
 //// [APISample_linter.js]
+"use strict";
 /*
  * Note: This test is a public API sample. The sample sources can be found
          at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#traversing-the-ast-with-a-little-linter
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
-"use strict";
 exports.__esModule = true;
 var ts = require("typescript");
 function delint(sourceFile) {
diff --git a/tests/baselines/reference/APISample_parseConfig.js b/tests/baselines/reference/APISample_parseConfig.js
index 009ed4b6a37..690efb359c6 100644
--- a/tests/baselines/reference/APISample_parseConfig.js
+++ b/tests/baselines/reference/APISample_parseConfig.js
@@ -36,12 +36,12 @@ export function createProgram(rootFiles: string[], compilerOptionsJson: string):
 }
 
 //// [APISample_parseConfig.js]
+"use strict";
 /*
  * Note: This test is a public API sample. The sample sources can be found
          at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
-"use strict";
 exports.__esModule = true;
 var ts = require("typescript");
 function printError(error) {
diff --git a/tests/baselines/reference/APISample_transform.js b/tests/baselines/reference/APISample_transform.js
index 58590f8c711..47f63f56e70 100644
--- a/tests/baselines/reference/APISample_transform.js
+++ b/tests/baselines/reference/APISample_transform.js
@@ -16,12 +16,12 @@ let result = ts.transpile(source, { module: ts.ModuleKind.CommonJS });
 console.log(JSON.stringify(result));
 
 //// [APISample_transform.js]
+"use strict";
 /*
  * Note: This test is a public API sample. The sample sources can be found
          at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-simple-transform-function
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
-"use strict";
 exports.__esModule = true;
 var ts = require("typescript");
 var source = "let x: string  = 'string'";
diff --git a/tests/baselines/reference/APISample_watcher.js b/tests/baselines/reference/APISample_watcher.js
index e9ca423b9fa..f06f9ced73f 100644
--- a/tests/baselines/reference/APISample_watcher.js
+++ b/tests/baselines/reference/APISample_watcher.js
@@ -109,12 +109,12 @@ const currentDirectoryFiles = fs.readdirSync(process.cwd()).
 watch(currentDirectoryFiles, { module: ts.ModuleKind.CommonJS });
 
 //// [APISample_watcher.js]
+"use strict";
 /*
  * Note: This test is a public API sample. The sample sources can be found
          at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#incremental-build-support-using-the-language-services
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
-"use strict";
 exports.__esModule = true;
 var ts = require("typescript");
 function watch(rootFileNames, options) {
diff --git a/tests/baselines/reference/alwaysStrictModule2.js b/tests/baselines/reference/alwaysStrictModule2.js
index 7ad0b36c4be..157e11e760a 100644
--- a/tests/baselines/reference/alwaysStrictModule2.js
+++ b/tests/baselines/reference/alwaysStrictModule2.js
@@ -23,7 +23,6 @@ var M;
     }
     M.f = f;
 })(M || (M = {}));
-"use strict";
 var M;
 (function (M) {
     function f2() {
diff --git a/tests/baselines/reference/amdDependencyComment1.js b/tests/baselines/reference/amdDependencyComment1.js
index 6be26909f3a..a11b65ff53f 100644
--- a/tests/baselines/reference/amdDependencyComment1.js
+++ b/tests/baselines/reference/amdDependencyComment1.js
@@ -5,8 +5,8 @@ import m1 = require("m2")
 m1.f();
 
 //// [amdDependencyComment1.js]
-///<amd-dependency path='bar'/>
 "use strict";
+///<amd-dependency path='bar'/>
 exports.__esModule = true;
 var m1 = require("m2");
 m1.f();
diff --git a/tests/baselines/reference/amdDependencyCommentName1.js b/tests/baselines/reference/amdDependencyCommentName1.js
index d0e4d73fb7a..5065ed12ab4 100644
--- a/tests/baselines/reference/amdDependencyCommentName1.js
+++ b/tests/baselines/reference/amdDependencyCommentName1.js
@@ -5,8 +5,8 @@ import m1 = require("m2")
 m1.f();
 
 //// [amdDependencyCommentName1.js]
-///<amd-dependency path='bar' name='b'/>
 "use strict";
+///<amd-dependency path='bar' name='b'/>
 exports.__esModule = true;
 var m1 = require("m2");
 m1.f();
diff --git a/tests/baselines/reference/commentOnImportStatement3.js b/tests/baselines/reference/commentOnImportStatement3.js
index c33088408e8..decc7a7878e 100644
--- a/tests/baselines/reference/commentOnImportStatement3.js
+++ b/tests/baselines/reference/commentOnImportStatement3.js
@@ -5,6 +5,6 @@
 import foo = require('./foo');
 
 //// [commentOnImportStatement3.js]
-/* copyright */
 "use strict";
+/* copyright */
 exports.__esModule = true;
diff --git a/tests/baselines/reference/complexNarrowingWithAny.js b/tests/baselines/reference/complexNarrowingWithAny.js
index 4408d64acbf..4531cde9f3e 100644
--- a/tests/baselines/reference/complexNarrowingWithAny.js
+++ b/tests/baselines/reference/complexNarrowingWithAny.js
@@ -560,8 +560,8 @@ export function viewFactory_AppComponent0(viewUtils:any,parentInjector:any,decla
 
 
 //// [complexNarrowingWithAny.js]
-// Repro from #10869
 "use strict";
+// Repro from #10869
 exports.__esModule = true;
 /**
  * This file is generated by the Angular 2 template compiler.
diff --git a/tests/baselines/reference/controlFlowPropertyDeclarations.js b/tests/baselines/reference/controlFlowPropertyDeclarations.js
index 27fce9a9a12..ab286b27f06 100644
--- a/tests/baselines/reference/controlFlowPropertyDeclarations.js
+++ b/tests/baselines/reference/controlFlowPropertyDeclarations.js
@@ -149,8 +149,8 @@ export class StyleParser {
 }
 
 //// [controlFlowPropertyDeclarations.js]
-// Repro from ##8913
 "use strict";
+// Repro from ##8913
 exports.__esModule = true;
 var HTMLDOMPropertyConfig = require('react/lib/HTMLDOMPropertyConfig');
 // Populate property map with ReactJS's attribute and property mappings
diff --git a/tests/baselines/reference/controlFlowSelfReferentialLoop.js b/tests/baselines/reference/controlFlowSelfReferentialLoop.js
index 6d07f1dbca1..4781f2776fb 100644
--- a/tests/baselines/reference/controlFlowSelfReferentialLoop.js
+++ b/tests/baselines/reference/controlFlowSelfReferentialLoop.js
@@ -101,8 +101,8 @@ function md5(string:string): void {
 export default md5;
 
 //// [controlFlowSelfReferentialLoop.js]
-// Repro from #12319
 "use strict";
+// Repro from #12319
 exports.__esModule = true;
 function md5(string) {
     function FF(a, b, c, d, x, s, ac) {
diff --git a/tests/baselines/reference/es6ExportEqualsInterop.js b/tests/baselines/reference/es6ExportEqualsInterop.js
index 156587028dd..5e04221df8b 100644
--- a/tests/baselines/reference/es6ExportEqualsInterop.js
+++ b/tests/baselines/reference/es6ExportEqualsInterop.js
@@ -207,8 +207,8 @@ export * from "class-module";
 
 
 //// [main.js]
-/// <reference path="modules.d.ts"/>
 "use strict";
+/// <reference path="modules.d.ts"/>
 function __export(m) {
     for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
 }
diff --git a/tests/baselines/reference/exportDefaultProperty2.js b/tests/baselines/reference/exportDefaultProperty2.js
index 4922738430a..5cc9dc47092 100644
--- a/tests/baselines/reference/exportDefaultProperty2.js
+++ b/tests/baselines/reference/exportDefaultProperty2.js
@@ -18,8 +18,8 @@ const x: B = { c: B };
 
 
 //// [a.js]
-// This test is just like exportEqualsProperty2, but with `export default`.
 "use strict";
+// This test is just like exportEqualsProperty2, but with `export default`.
 exports.__esModule = true;
 var C = (function () {
     function C() {
diff --git a/tests/baselines/reference/exportEqualsProperty2.js b/tests/baselines/reference/exportEqualsProperty2.js
index 36fcbdf3446..5cfcab3e774 100644
--- a/tests/baselines/reference/exportEqualsProperty2.js
+++ b/tests/baselines/reference/exportEqualsProperty2.js
@@ -18,8 +18,8 @@ const x: B = { c: B };
 
 
 //// [a.js]
-// This test is just like exportDefaultProperty2, but with `export =`.
 "use strict";
+// This test is just like exportDefaultProperty2, but with `export =`.
 var C = (function () {
     function C() {
     }
diff --git a/tests/baselines/reference/intersectionTypeInference1.js b/tests/baselines/reference/intersectionTypeInference1.js
index 32ddedae2b3..e13f8edf0cf 100644
--- a/tests/baselines/reference/intersectionTypeInference1.js
+++ b/tests/baselines/reference/intersectionTypeInference1.js
@@ -9,8 +9,8 @@ export const Form3 = brokenFunction(parameterFn)({store: "hello"})
 
 
 //// [intersectionTypeInference1.js]
-// Repro from #8801
 "use strict";
+// Repro from #8801
 exports.__esModule = true;
 function alert(s) { }
 var parameterFn = function (props) { return alert(props.store); };
diff --git a/tests/baselines/reference/moduleAugmentationInAmbientModule1.js b/tests/baselines/reference/moduleAugmentationInAmbientModule1.js
index 13e6ef2c4fa..7bd3c93496c 100644
--- a/tests/baselines/reference/moduleAugmentationInAmbientModule1.js
+++ b/tests/baselines/reference/moduleAugmentationInAmbientModule1.js
@@ -27,8 +27,8 @@ x.foo().x;
 
 
 //// [main.js]
-/// <reference path="O.d.ts" />
 "use strict";
+/// <reference path="O.d.ts" />
 exports.__esModule = true;
 var x;
 x.foo().x;
diff --git a/tests/baselines/reference/moduleAugmentationInAmbientModule2.js b/tests/baselines/reference/moduleAugmentationInAmbientModule2.js
index 91edc37e0fa..f3d276309ef 100644
--- a/tests/baselines/reference/moduleAugmentationInAmbientModule2.js
+++ b/tests/baselines/reference/moduleAugmentationInAmbientModule2.js
@@ -28,8 +28,8 @@ x.foo().x;
 
 
 //// [main.js]
-/// <reference path="O.d.ts" />
 "use strict";
+/// <reference path="O.d.ts" />
 exports.__esModule = true;
 require("Map");
 var x;
diff --git a/tests/baselines/reference/moduleAugmentationInAmbientModule3.js b/tests/baselines/reference/moduleAugmentationInAmbientModule3.js
index 6a572a2a1d2..3cedfd66d5d 100644
--- a/tests/baselines/reference/moduleAugmentationInAmbientModule3.js
+++ b/tests/baselines/reference/moduleAugmentationInAmbientModule3.js
@@ -38,8 +38,8 @@ x.foo2().x2;
 
 
 //// [main.js]
-/// <reference path="O.d.ts" />
 "use strict";
+/// <reference path="O.d.ts" />
 exports.__esModule = true;
 require("Map");
 var x;
diff --git a/tests/baselines/reference/moduleAugmentationInAmbientModule4.js b/tests/baselines/reference/moduleAugmentationInAmbientModule4.js
index 74b101c7275..ab4ff1bc79f 100644
--- a/tests/baselines/reference/moduleAugmentationInAmbientModule4.js
+++ b/tests/baselines/reference/moduleAugmentationInAmbientModule4.js
@@ -40,9 +40,9 @@ x.foo2().x2;
 
 
 //// [main.js]
+"use strict";
 /// <reference path="O.d.ts" />
 /// <reference path="O2.d.ts" />
-"use strict";
 exports.__esModule = true;
 require("Map");
 var x;
diff --git a/tests/baselines/reference/moduleResolutionWithSymlinks.js b/tests/baselines/reference/moduleResolutionWithSymlinks.js
index 520324cb222..b483f356252 100644
--- a/tests/baselines/reference/moduleResolutionWithSymlinks.js
+++ b/tests/baselines/reference/moduleResolutionWithSymlinks.js
@@ -40,9 +40,9 @@ tsc app.ts # Should write to library-a/index.js, library-b/index.js, and app.js
 
 
 //// [/src/library-a/index.js]
+"use strict";
 // When symlinked files are in node_modules, they are resolved with realpath;
 // so a linked file does not create a duplicate SourceFile of the real one.
-"use strict";
 exports.__esModule = true;
 var MyClass = (function () {
     function MyClass() {
diff --git a/tests/baselines/reference/moduleResolutionWithSymlinks_notInNodeModules.js b/tests/baselines/reference/moduleResolutionWithSymlinks_notInNodeModules.js
index cde63e0604d..bf51b7e3bca 100644
--- a/tests/baselines/reference/moduleResolutionWithSymlinks_notInNodeModules.js
+++ b/tests/baselines/reference/moduleResolutionWithSymlinks_notInNodeModules.js
@@ -14,17 +14,17 @@ x + x2;
 
 
 //// [/src/bin/shared/abc.js]
+"use strict";
 // When symlinked files are not in node_modules, realpath is not used.
 // A symlink file acts like the real thing. So, 2 symlinks act like 2 different files.
 // See GH#10364. 
-"use strict";
 exports.__esModule = true;
 exports.x = 0;
 //// [/src/bin/shared2/abc.js]
+"use strict";
 // When symlinked files are not in node_modules, realpath is not used.
 // A symlink file acts like the real thing. So, 2 symlinks act like 2 different files.
 // See GH#10364. 
-"use strict";
 exports.__esModule = true;
 exports.x = 0;
 //// [/src/bin/app.js]
diff --git a/tests/baselines/reference/moduleResolutionWithSymlinks_withOutDir.js b/tests/baselines/reference/moduleResolutionWithSymlinks_withOutDir.js
index 0bd77a1dcc7..0049ad48f91 100644
--- a/tests/baselines/reference/moduleResolutionWithSymlinks_withOutDir.js
+++ b/tests/baselines/reference/moduleResolutionWithSymlinks_withOutDir.js
@@ -20,8 +20,8 @@ y = x;
 
 
 //// [/src/bin/library-a/index.js]
-// Same as moduleResolutionWithSymlinks.ts, but with outDir
 "use strict";
+// Same as moduleResolutionWithSymlinks.ts, but with outDir
 exports.__esModule = true;
 var MyClass = (function () {
     function MyClass() {
diff --git a/tests/baselines/reference/narrowingConstrainedTypeParameter.js b/tests/baselines/reference/narrowingConstrainedTypeParameter.js
index fa9a18126d6..a2946838851 100644
--- a/tests/baselines/reference/narrowingConstrainedTypeParameter.js
+++ b/tests/baselines/reference/narrowingConstrainedTypeParameter.js
@@ -17,8 +17,8 @@ export function speak<TPet extends Pet>(pet: TPet, voice: (pet: TPet) => string)
 }
 
 //// [narrowingConstrainedTypeParameter.js]
-// Repro from #10811
 "use strict";
+// Repro from #10811
 exports.__esModule = true;
 function isPet(pet) {
     return typeof pet.name === "string";
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution3_node.js b/tests/baselines/reference/pathMappingBasedModuleResolution3_node.js
index f4dc1dd2674..969a98dc4cc 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution3_node.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution3_node.js
@@ -29,8 +29,8 @@ var file3_1 = require("./file3"); // found with baseurl
 var file4_1 = require("file4"); // found with fallback
 exports.x = file3_1.x + file4_1.y;
 //// [file1.js]
-// baseUrl set via command line
 "use strict";
+// baseUrl set via command line
 exports.__esModule = true;
 var file2_1 = require("folder2/file2");
 use(file2_1.x.toExponential());
diff --git a/tests/baselines/reference/requireOfAnEmptyFile1.js b/tests/baselines/reference/requireOfAnEmptyFile1.js
index a1e6dbbc447..e792d9fa763 100644
--- a/tests/baselines/reference/requireOfAnEmptyFile1.js
+++ b/tests/baselines/reference/requireOfAnEmptyFile1.js
@@ -10,6 +10,6 @@ import fs = require('./requireOfAnEmptyFile1_b');
 
 //// [requireOfAnEmptyFile1_b.js]
 //// [requireOfAnEmptyFile1_a.js]
-//requireOfAnEmptyFile1
 "use strict";
+//requireOfAnEmptyFile1
 exports.__esModule = true;
diff --git a/tests/baselines/reference/typeGuardsAsAssertions.js b/tests/baselines/reference/typeGuardsAsAssertions.js
index 2b291beba36..8c9b2048514 100644
--- a/tests/baselines/reference/typeGuardsAsAssertions.js
+++ b/tests/baselines/reference/typeGuardsAsAssertions.js
@@ -122,8 +122,8 @@ function f6() {
 
 
 //// [typeGuardsAsAssertions.js]
-// Repro from #8513
 "use strict";
+// Repro from #8513
 exports.__esModule = true;
 var cond;
 exports.none = { none: '' };
diff --git a/tests/baselines/reference/typeGuardsInExternalModule.js b/tests/baselines/reference/typeGuardsInExternalModule.js
index 0a5abd59373..03f2d2cee8d 100644
--- a/tests/baselines/reference/typeGuardsInExternalModule.js
+++ b/tests/baselines/reference/typeGuardsInExternalModule.js
@@ -24,9 +24,9 @@ else {
 }
 
 //// [typeGuardsInExternalModule.js]
+"use strict";
 // Note that type guards affect types of variables and parameters only and 
 // have no effect on members of objects such as properties. 
-"use strict";
 exports.__esModule = true;
 // local variable in external module
 var num;
diff --git a/tests/baselines/reference/typePredicateInLoop.js b/tests/baselines/reference/typePredicateInLoop.js
index f5a99b68971..e3e01d13ef1 100644
--- a/tests/baselines/reference/typePredicateInLoop.js
+++ b/tests/baselines/reference/typePredicateInLoop.js
@@ -22,8 +22,8 @@ export function y(arg: Type): void {
 }
 
 //// [typePredicateInLoop.js]
-// Repro from #12101
 "use strict";
+// Repro from #12101
 exports.__esModule = true;
 var guard = function (arg) { return arg.type === 1; };
 var otherFunc = function (arg1, arg2) { };
diff --git a/tests/baselines/reference/typeReferenceDirectives7.js b/tests/baselines/reference/typeReferenceDirectives7.js
index 866c284b8fd..7be0651a581 100644
--- a/tests/baselines/reference/typeReferenceDirectives7.js
+++ b/tests/baselines/reference/typeReferenceDirectives7.js
@@ -15,8 +15,8 @@ export let x: typeof $;
 export let y = () => x
 
 //// [app.js]
-/// <reference types="lib"/>
 "use strict";
+/// <reference types="lib"/>
 exports.__esModule = true;
 exports.$ = 1;
 exports.y = function () { return exports.x; };
diff --git a/tests/baselines/reference/typeReferenceDirectives9.js b/tests/baselines/reference/typeReferenceDirectives9.js
index fe60edad1dd..54685ef7961 100644
--- a/tests/baselines/reference/typeReferenceDirectives9.js
+++ b/tests/baselines/reference/typeReferenceDirectives9.js
@@ -41,8 +41,8 @@ var Cls = (function () {
 }());
 exports.Cls = Cls;
 //// [mod1.js]
-/// <reference types="lib" />
 "use strict";
+/// <reference types="lib" />
 exports.__esModule = true;
 var main_1 = require("./main");
 main_1.Cls.prototype.foo = function () { return undefined; };
diff --git a/tests/baselines/reference/visibilityOfCrossModuleTypeUsage.js b/tests/baselines/reference/visibilityOfCrossModuleTypeUsage.js
index a6d1b095894..1eab90467d4 100644
--- a/tests/baselines/reference/visibilityOfCrossModuleTypeUsage.js
+++ b/tests/baselines/reference/visibilityOfCrossModuleTypeUsage.js
@@ -29,8 +29,8 @@ function run(configuration: commands.IConfiguration) {
 "use strict";
 exports.__esModule = true;
 //// [visibilityOfCrossModuleTypeUsage_commands.js]
-//visibilityOfCrossModuleTypeUsage
 "use strict";
+//visibilityOfCrossModuleTypeUsage
 exports.__esModule = true;
 //// [visibilityOfCrossModuleTypeUsage_fs.js]
 "use strict";