diff --git a/src/harness/harnessIO.ts b/src/harness/harnessIO.ts
index 87148c13492a7..dfa3cf68b75c5 100644
--- a/src/harness/harnessIO.ts
+++ b/src/harness/harnessIO.ts
@@ -177,8 +177,6 @@ namespace Harness {
     }
 
     export const libFolder = "built/local/";
-    const tcServicesFileName = ts.combinePaths(libFolder, "typescriptServices.js");
-    export const tcServicesFile = IO.readFile(tcServicesFileName) + IO.newLine() + `//# sourceURL=${IO.resolvePath(tcServicesFileName)}`;
 
     export type SourceMapEmitterCallback = (
         emittedFile: string,
diff --git a/tests/baselines/reference/APISample_Watch.js b/tests/baselines/reference/APISample_Watch.js
index e675f2ec4eb47..5c9ad996f7f4e 100644
--- a/tests/baselines/reference/APISample_Watch.js
+++ b/tests/baselines/reference/APISample_Watch.js
@@ -1,8 +1,9 @@
 //// [tests/cases/compiler/APISample_Watch.ts] ////
 
-//// [index.d.ts]
-declare module "typescript" {
-    export = ts;
+//// [package.json]
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 //// [APISample_Watch.ts]
diff --git a/tests/baselines/reference/APISample_WatchWithDefaults.js b/tests/baselines/reference/APISample_WatchWithDefaults.js
index 63bfa4965e51e..3961a1367eae5 100644
--- a/tests/baselines/reference/APISample_WatchWithDefaults.js
+++ b/tests/baselines/reference/APISample_WatchWithDefaults.js
@@ -1,8 +1,9 @@
 //// [tests/cases/compiler/APISample_WatchWithDefaults.ts] ////
 
-//// [index.d.ts]
-declare module "typescript" {
-    export = ts;
+//// [package.json]
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 //// [APISample_WatchWithDefaults.ts]
diff --git a/tests/baselines/reference/APISample_WatchWithOwnWatchHost.js b/tests/baselines/reference/APISample_WatchWithOwnWatchHost.js
index 75444a614f952..56286921e77d7 100644
--- a/tests/baselines/reference/APISample_WatchWithOwnWatchHost.js
+++ b/tests/baselines/reference/APISample_WatchWithOwnWatchHost.js
@@ -1,8 +1,9 @@
 //// [tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts] ////
 
-//// [index.d.ts]
-declare module "typescript" {
-    export = ts;
+//// [package.json]
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 //// [APISample_WatchWithOwnWatchHost.ts]
diff --git a/tests/baselines/reference/APISample_compile.js b/tests/baselines/reference/APISample_compile.js
index b19bc06d1e63a..3dfec01fc8f4d 100644
--- a/tests/baselines/reference/APISample_compile.js
+++ b/tests/baselines/reference/APISample_compile.js
@@ -1,8 +1,9 @@
 //// [tests/cases/compiler/APISample_compile.ts] ////
 
-//// [index.d.ts]
-declare module "typescript" {
-    export = ts;
+//// [package.json]
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 //// [APISample_compile.ts]
diff --git a/tests/baselines/reference/APISample_jsdoc.js b/tests/baselines/reference/APISample_jsdoc.js
index 50288c1237ea5..4763a59736202 100644
--- a/tests/baselines/reference/APISample_jsdoc.js
+++ b/tests/baselines/reference/APISample_jsdoc.js
@@ -1,8 +1,9 @@
 //// [tests/cases/compiler/APISample_jsdoc.ts] ////
 
-//// [index.d.ts]
-declare module "typescript" {
-    export = ts;
+//// [package.json]
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 //// [APISample_jsdoc.ts]
diff --git a/tests/baselines/reference/APISample_linter.js b/tests/baselines/reference/APISample_linter.js
index 65e03d339e611..185a346d3abef 100644
--- a/tests/baselines/reference/APISample_linter.js
+++ b/tests/baselines/reference/APISample_linter.js
@@ -1,8 +1,9 @@
 //// [tests/cases/compiler/APISample_linter.ts] ////
 
-//// [index.d.ts]
-declare module "typescript" {
-    export = ts;
+//// [package.json]
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 //// [APISample_linter.ts]
@@ -68,7 +69,8 @@ fileNames.forEach(fileName => {
 
     // delint it
     delint(sourceFile);
-});
+});
+
 
 //// [APISample_linter.js]
 "use strict";
diff --git a/tests/baselines/reference/APISample_parseConfig.js b/tests/baselines/reference/APISample_parseConfig.js
index e9dc119417cfe..422ac5c188a55 100644
--- a/tests/baselines/reference/APISample_parseConfig.js
+++ b/tests/baselines/reference/APISample_parseConfig.js
@@ -1,8 +1,9 @@
 //// [tests/cases/compiler/APISample_parseConfig.ts] ////
 
-//// [index.d.ts]
-declare module "typescript" {
-    export = ts;
+//// [package.json]
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 //// [APISample_parseConfig.ts]
@@ -40,7 +41,8 @@ export function createProgram(rootFiles: string[], compilerOptionsJson: string):
         return undefined;
     }
     return ts.createProgram(rootFiles, settings.options);
-}
+}
+
 
 //// [APISample_parseConfig.js]
 "use strict";
diff --git a/tests/baselines/reference/APISample_transform.js b/tests/baselines/reference/APISample_transform.js
index db25c1bd1dd06..12f2f4ca12b81 100644
--- a/tests/baselines/reference/APISample_transform.js
+++ b/tests/baselines/reference/APISample_transform.js
@@ -1,8 +1,9 @@
 //// [tests/cases/compiler/APISample_transform.ts] ////
 
-//// [index.d.ts]
-declare module "typescript" {
-    export = ts;
+//// [package.json]
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 //// [APISample_transform.ts]
@@ -20,7 +21,8 @@ const source = "let x: string  = 'string'";
 
 let result = ts.transpile(source, { module: ts.ModuleKind.CommonJS });
 
-console.log(JSON.stringify(result));
+console.log(JSON.stringify(result));
+
 
 //// [APISample_transform.js]
 "use strict";
diff --git a/tests/baselines/reference/APISample_watcher.js b/tests/baselines/reference/APISample_watcher.js
index d86eb60e6777b..a66fb1cc3ffdf 100644
--- a/tests/baselines/reference/APISample_watcher.js
+++ b/tests/baselines/reference/APISample_watcher.js
@@ -1,8 +1,9 @@
 //// [tests/cases/compiler/APISample_watcher.ts] ////
 
-//// [index.d.ts]
-declare module "typescript" {
-    export = ts;
+//// [package.json]
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 //// [APISample_watcher.ts]
diff --git a/tests/cases/compiler/APISample_Watch.ts b/tests/cases/compiler/APISample_Watch.ts
index 154e5f90b0e71..fccc413756468 100644
--- a/tests/cases/compiler/APISample_Watch.ts
+++ b/tests/cases/compiler/APISample_Watch.ts
@@ -1,12 +1,12 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
-// @filename: node_modules/typescript/index.d.ts
-declare module "typescript" {
-    export = ts;
+// @filename: node_modules/typescript/package.json
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 // @filename: APISample_Watch.ts
diff --git a/tests/cases/compiler/APISample_WatchWithDefaults.ts b/tests/cases/compiler/APISample_WatchWithDefaults.ts
index d028d109275ca..7efada18dbad7 100644
--- a/tests/cases/compiler/APISample_WatchWithDefaults.ts
+++ b/tests/cases/compiler/APISample_WatchWithDefaults.ts
@@ -1,12 +1,12 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
-// @filename: node_modules/typescript/index.d.ts
-declare module "typescript" {
-    export = ts;
+// @filename: node_modules/typescript/package.json
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 // @filename: APISample_WatchWithDefaults.ts
diff --git a/tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts b/tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts
index 18cb5766ce331..794be55855d83 100644
--- a/tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts
+++ b/tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts
@@ -1,12 +1,12 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
-// @filename: node_modules/typescript/index.d.ts
-declare module "typescript" {
-    export = ts;
+// @filename: node_modules/typescript/package.json
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 // @filename: APISample_WatchWithOwnWatchHost.ts
diff --git a/tests/cases/compiler/APISample_compile.ts b/tests/cases/compiler/APISample_compile.ts
index 49d821fae16b3..ed5d5723f3c0a 100644
--- a/tests/cases/compiler/APISample_compile.ts
+++ b/tests/cases/compiler/APISample_compile.ts
@@ -1,12 +1,12 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
-// @filename: node_modules/typescript/index.d.ts
-declare module "typescript" {
-    export = ts;
+// @filename: node_modules/typescript/package.json
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 // @filename: APISample_compile.ts
diff --git a/tests/cases/compiler/APISample_jsdoc.ts b/tests/cases/compiler/APISample_jsdoc.ts
index 22f98f4797f36..d166e435feb15 100644
--- a/tests/cases/compiler/APISample_jsdoc.ts
+++ b/tests/cases/compiler/APISample_jsdoc.ts
@@ -1,12 +1,12 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
-// @filename: node_modules/typescript/index.d.ts
-declare module "typescript" {
-    export = ts;
+// @filename: node_modules/typescript/package.json
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 // @filename: APISample_jsdoc.ts
diff --git a/tests/cases/compiler/APISample_linter.ts b/tests/cases/compiler/APISample_linter.ts
index a6ae00944bb07..7d485e4d85ff1 100644
--- a/tests/cases/compiler/APISample_linter.ts
+++ b/tests/cases/compiler/APISample_linter.ts
@@ -1,12 +1,12 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
-// @filename: node_modules/typescript/index.d.ts
-declare module "typescript" {
-    export = ts;
+// @filename: node_modules/typescript/package.json
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 // @filename: APISample_linter.ts
@@ -72,4 +72,4 @@ fileNames.forEach(fileName => {
 
     // delint it
     delint(sourceFile);
-});
\ No newline at end of file
+});
diff --git a/tests/cases/compiler/APISample_parseConfig.ts b/tests/cases/compiler/APISample_parseConfig.ts
index 243e25f995b2a..a4bcbc4aea8c5 100644
--- a/tests/cases/compiler/APISample_parseConfig.ts
+++ b/tests/cases/compiler/APISample_parseConfig.ts
@@ -1,12 +1,12 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
-// @filename: node_modules/typescript/index.d.ts
-declare module "typescript" {
-    export = ts;
+// @filename: node_modules/typescript/package.json
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 // @filename: APISample_parseConfig.ts
@@ -44,4 +44,4 @@ export function createProgram(rootFiles: string[], compilerOptionsJson: string):
         return undefined;
     }
     return ts.createProgram(rootFiles, settings.options);
-}
\ No newline at end of file
+}
diff --git a/tests/cases/compiler/APISample_transform.ts b/tests/cases/compiler/APISample_transform.ts
index a750d0d359596..b2e001071bb1a 100644
--- a/tests/cases/compiler/APISample_transform.ts
+++ b/tests/cases/compiler/APISample_transform.ts
@@ -1,12 +1,12 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
-// @filename: node_modules/typescript/index.d.ts
-declare module "typescript" {
-    export = ts;
+// @filename: node_modules/typescript/package.json
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 // @filename: APISample_transform.ts
@@ -24,4 +24,4 @@ const source = "let x: string  = 'string'";
 
 let result = ts.transpile(source, { module: ts.ModuleKind.CommonJS });
 
-console.log(JSON.stringify(result));
\ No newline at end of file
+console.log(JSON.stringify(result));
diff --git a/tests/cases/compiler/APISample_watcher.ts b/tests/cases/compiler/APISample_watcher.ts
index dfae23488c6e3..824b083b6be66 100644
--- a/tests/cases/compiler/APISample_watcher.ts
+++ b/tests/cases/compiler/APISample_watcher.ts
@@ -1,12 +1,12 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
-// @filename: node_modules/typescript/index.d.ts
-declare module "typescript" {
-    export = ts;
+// @filename: node_modules/typescript/package.json
+{
+    "name": "typescript",
+    "types": "/.ts/typescript.d.ts"
 }
 
 // @filename: APISample_watcher.ts