diff --git a/modules/@angular/upgrade/src/aot/upgrade_module.ts b/modules/@angular/upgrade/src/aot/upgrade_module.ts
index 46cef6c605b045..f7f6814f769e67 100644
--- a/modules/@angular/upgrade/src/aot/upgrade_module.ts
+++ b/modules/@angular/upgrade/src/aot/upgrade_module.ts
@@ -166,16 +166,14 @@ export class UpgradeModule {
                     (testabilityDelegate: angular.ITestabilityService) => {
                       const originalWhenStable: Function = testabilityDelegate.whenStable;
                       const injector = this.injector;
-                      // Cannot use arrow function below because we need to grab the context
+                      // Cannot use arrow function below because we need the context
                       const newWhenStable = function(callback: Function) {
-                        const whenStableContext: any = this;
                         originalWhenStable.call(this, function() {
                           const ng2Testability: Testability = injector.get(Testability);
                           if (ng2Testability.isStable()) {
                             callback.apply(this, arguments);
                           } else {
-                            ng2Testability.whenStable(
-                                newWhenStable.bind(whenStableContext, callback));
+                            ng2Testability.whenStable(newWhenStable.bind(this, callback));
                           }
                         });
                       };
diff --git a/modules/@angular/upgrade/src/upgrade_adapter.ts b/modules/@angular/upgrade/src/upgrade_adapter.ts
index e1984eaad0a4e0..a488d9ca285888 100644
--- a/modules/@angular/upgrade/src/upgrade_adapter.ts
+++ b/modules/@angular/upgrade/src/upgrade_adapter.ts
@@ -355,14 +355,14 @@ export class UpgradeAdapter {
                 function(testabilityDelegate: angular.ITestabilityService) {
 
                   const originalWhenStable: Function = testabilityDelegate.whenStable;
-                  const newWhenStable = (callback: Function): void => {
-                    const whenStableContext: any = this;
+                  // Cannot use arrow function below because we need the context
+                  const newWhenStable = function(callback: Function) {
                     originalWhenStable.call(this, function() {
                       const ng2Testability: Testability = moduleRef.injector.get(Testability);
                       if (ng2Testability.isStable()) {
                         callback.apply(this, arguments);
                       } else {
-                        ng2Testability.whenStable(newWhenStable.bind(whenStableContext, callback));
+                        ng2Testability.whenStable(newWhenStable.bind(this, callback));
                       }
                     });
                   };
@@ -433,8 +433,9 @@ export class UpgradeAdapter {
       if (windowAngular.resumeBootstrap) {
         const originalResumeBootstrap: () => void = windowAngular.resumeBootstrap;
         windowAngular.resumeBootstrap = function() {
+          let args = arguments;
           windowAngular.resumeBootstrap = originalResumeBootstrap;
-          windowAngular.resumeBootstrap.apply(this, arguments);
+          ngZone.run(() => { windowAngular.resumeBootstrap.apply(this, args); });
           resolve();
         };
       } else {