diff --git a/packages/metro-bundler/src/integration_tests/__tests__/__snapshots__/basic_bundle-test.js.snap b/packages/metro-bundler/src/integration_tests/__tests__/__snapshots__/basic_bundle-test.js.snap
index 739b420e..643a6feb 100644
--- a/packages/metro-bundler/src/integration_tests/__tests__/__snapshots__/basic_bundle-test.js.snap
+++ b/packages/metro-bundler/src/integration_tests/__tests__/__snapshots__/basic_bundle-test.js.snap
@@ -1,6 +1,6 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`basic_bundle bundles package with polyfills as expected 1`] = `
+exports[`basic_bundle bundles package with polyfills 1`] = `
 "(function(global) {
 
 global.__DEV__ = false;
@@ -267,7 +267,7 @@ __d(/* /AssetRegistry.js */function(global, require, module, exports) {
 ;require(0);"
 `;
 
-exports[`basic_bundle bundles package without polyfills as expected 1`] = `
+exports[`basic_bundle bundles package without polyfills 1`] = `
 "(function(global) {
 
 global.__DEV__ = false;
@@ -484,28 +484,12 @@ if (__DEV__) {
   })();
 }
 })(typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : this);
-(function(global) {
-
-'use strict';
-
-if (!Object.keys) {
-  Object.keys = function () {};
-}
-})(typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : this);
-(function(global) {
-
-'use strict';
-
-if (!String.prototype.repeat) {
-  String.prototype.repeat = function () {};
-}
-})(typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : this);
 __d(/* /TestBundle.js */function(global, require, module, exports) {
 
 'use strict';
 
-var Bar = require(5); // 5 = ./Bar
-var Foo = require(6); // 6 = ./Foo
+var Bar = require(3); // 3 = ./Bar
+var Foo = require(4); // 4 = ./Foo
 
 module.exports = { Foo: Foo, Bar: Bar };
 }, 0);
@@ -513,23 +497,23 @@ __d(/* /Bar.js */function(global, require, module, exports) {
 
 'use strict';
 
-var Foo = require(6); // 6 = ./Foo
+var Foo = require(4); // 4 = ./Foo
 
 module.exports = { type: 'bar', foo: Foo.type };
-}, 5);
+}, 3);
 __d(/* /Foo.js */function(global, require, module, exports) {
 
 'use strict';
 
-var asset = require(7); // 7 = ./test.png
+var asset = require(5); // 5 = ./test.png
 
 module.exports = { type: 'foo', asset: asset };
-}, 6);
-__d(/* /test.png */function(global, require, module, exports) {module.exports=require(8).registerAsset({\\"__packager_asset\\":true,\\"httpServerLocation\\":\\"/assets\\",\\"width\\":8,\\"height\\":8,\\"scales\\":[1],\\"hash\\":\\"77d45c1f7fa73c0f6c444a830dc42f67\\",\\"name\\":\\"test\\",\\"type\\":\\"png\\"}); // 8 = /AssetRegistry
-}, 7);
+}, 4);
+__d(/* /test.png */function(global, require, module, exports) {module.exports=require(6).registerAsset({\\"__packager_asset\\":true,\\"httpServerLocation\\":\\"/assets\\",\\"width\\":8,\\"height\\":8,\\"scales\\":[1],\\"hash\\":\\"77d45c1f7fa73c0f6c444a830dc42f67\\",\\"name\\":\\"test\\",\\"type\\":\\"png\\"}); // 6 = /AssetRegistry
+}, 5);
 __d(/* /AssetRegistry.js */function(global, require, module, exports) {
 
 'use strict';
-}, 8);
+}, 6);
 ;require(0);"
 `;
diff --git a/packages/metro-bundler/src/integration_tests/__tests__/basic_bundle-test.js b/packages/metro-bundler/src/integration_tests/__tests__/basic_bundle-test.js
index 43b0b6d8..d6091b4e 100644
--- a/packages/metro-bundler/src/integration_tests/__tests__/basic_bundle-test.js
+++ b/packages/metro-bundler/src/integration_tests/__tests__/basic_bundle-test.js
@@ -92,7 +92,7 @@ describe('basic_bundle', () => {
     ).toMatchSnapshot();
   }
 
-  it('bundles package with polyfills as expected', async () => {
+  it('bundles package with polyfills', async () => {
     const bundleWithPolyfills = await Packager.buildBundle(
       {
         assetRegistryPath: ASSET_REGISTRY_PATH,
@@ -111,11 +111,11 @@ describe('basic_bundle', () => {
     verifyResultCode(bundleWithPolyfills.getSource());
   });
 
-  it('bundles package without polyfills as expected', async () => {
+  it('bundles package without polyfills', async () => {
     const bundleWithoutPolyfills = await Packager.buildBundle(
       {
         assetRegistryPath: ASSET_REGISTRY_PATH,
-        getPolyfills: () => [polyfill1, polyfill2],
+        getPolyfills: () => [],
         projectRoots: [INPUT_PATH, POLYFILLS_PATH],
         transformCache: Packager.TransformCaching.none(),
         transformModulePath: require.resolve('../../transformer'),
diff --git a/packages/metro-bundler/src/node-haste/lib/toLocalPath.js b/packages/metro-bundler/src/node-haste/lib/toLocalPath.js
index a4ea441b..e6f011aa 100644
--- a/packages/metro-bundler/src/node-haste/lib/toLocalPath.js
+++ b/packages/metro-bundler/src/node-haste/lib/toLocalPath.js
@@ -31,7 +31,7 @@ function toLocalPath(
   }
 
   throw new Error(
-    'Expected root module to be relative to one of the project roots',
+    `Expected path \`${absolutePath}\` to be relative to one of the project roots`,
   );
 }