diff --git a/modules/@angular/upgrade/src/common/downgrade_component_adapter.ts b/modules/@angular/upgrade/src/common/downgrade_component_adapter.ts
index c6549e8923..fa536a47e2 100644
--- a/modules/@angular/upgrade/src/common/downgrade_component_adapter.ts
+++ b/modules/@angular/upgrade/src/common/downgrade_component_adapter.ts
@@ -78,17 +78,15 @@ export class DowngradeComponentAdapter {
       let expr: any /** TODO #9100 */ = null;
 
       if (attrs.hasOwnProperty(input.attr)) {
-        const observeFn = ((prop: any /** TODO #9100 */) => {
+        const observeFn = (prop => {
           let prevValue = INITIAL_VALUE;
-          return (value: any /** TODO #9100 */) => {
-            if (this.inputChanges !== null) {
-              this.inputChangeCount++;
-              this.inputChanges[prop] = new SimpleChange(
-                  value, prevValue === INITIAL_VALUE ? value : prevValue,
-                  prevValue === INITIAL_VALUE);
-              prevValue = value;
+          return (currValue: any) => {
+            if (prevValue === INITIAL_VALUE) {
+              prevValue = currValue;
             }
-            this.component[prop] = value;
+
+            this.updateInput(prop, prevValue, currValue);
+            prevValue = currValue;
           };
         })(input.prop);
         attrs.$observe(input.attr, observeFn);
@@ -104,14 +102,8 @@ export class DowngradeComponentAdapter {
       }
       if (expr != null) {
         const watchFn =
-            ((prop: any /** TODO #9100 */) => (
-                 value: any /** TODO #9100 */, prevValue: any /** TODO #9100 */) => {
-              if (this.inputChanges != null) {
-                this.inputChangeCount++;
-                this.inputChanges[prop] = new SimpleChange(prevValue, value, prevValue === value);
-              }
-              this.component[prop] = value;
-            })(input.prop);
+            (prop => (currValue: any, prevValue: any) =>
+                 this.updateInput(prop, prevValue, currValue))(input.prop);
         this.componentScope.$watch(expr, watchFn);
       }
     }
@@ -185,4 +177,13 @@ export class DowngradeComponentAdapter {
   }
 
   getInjector(): Injector { return this.componentRef && this.componentRef.injector; }
+
+  private updateInput(prop: string, prevValue: any, currValue: any) {
+    if (this.inputChanges) {
+      this.inputChangeCount++;
+      this.inputChanges[prop] = new SimpleChange(prevValue, currValue, prevValue === currValue);
+    }
+
+    this.component[prop] = currValue;
+  }
 }
diff --git a/modules/@angular/upgrade/test/dynamic/upgrade_spec.ts b/modules/@angular/upgrade/test/dynamic/upgrade_spec.ts
index 1db48add84..db05c40801 100644
--- a/modules/@angular/upgrade/test/dynamic/upgrade_spec.ts
+++ b/modules/@angular/upgrade/test/dynamic/upgrade_spec.ts
@@ -290,9 +290,11 @@ export function main() {
 
       it('should bind properties, events', async(() => {
            const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
-           const ng1Module = angular.module('ng1', []);
+           const ng1Module =
+               angular.module('ng1', []).value('$exceptionHandler', (err: any) => { throw err; });
 
            ng1Module.run(($rootScope: any) => {
+             $rootScope.name = 'world';
              $rootScope.dataA = 'A';
              $rootScope.dataB = 'B';
              $rootScope.modelA = 'initModelA';
@@ -363,9 +365,10 @@ export function main() {
                    break;
                  case 1:
                    assertChange('twoWayA', 'newA');
+                   assertChange('twoWayB', 'newB');
                    break;
                  case 2:
-                   assertChange('twoWayB', 'newB');
+                   assertChange('interpolate', 'Hello everyone');
                    break;
                  default:
                    throw new Error('Called too many times! ' + JSON.stringify(changes));
@@ -380,7 +383,7 @@ export function main() {
                              }).Class({constructor: function() {}});
 
            const element = html(`<div>
-              <ng2 literal="Text" interpolate="Hello {{'world'}}"
+              <ng2 literal="Text" interpolate="Hello {{name}}"
                    bind-one-way-a="dataA" [one-way-b]="dataB"
                    bindon-two-way-a="modelA" [(two-way-b)]="modelB"
                    on-event-a='eventA=$event' (event-b)="eventB=$event"></ng2>
@@ -393,6 +396,15 @@ export function main() {
                      'literal: Text; interpolate: Hello world; ' +
                      'oneWayA: A; oneWayB: B; twoWayA: newA; twoWayB: newB; (2) | ' +
                      'modelA: newA; modelB: newB; eventA: aFired; eventB: bFired;');
+
+             ref.ng1RootScope.$apply('name = "everyone"');
+             expect(multiTrim(document.body.textContent))
+                 .toEqual(
+                     'ignore: -; ' +
+                     'literal: Text; interpolate: Hello everyone; ' +
+                     'oneWayA: A; oneWayB: B; twoWayA: newA; twoWayB: newB; (3) | ' +
+                     'modelA: newA; modelB: newB; eventA: aFired; eventB: bFired;');
+
              ref.dispose();
            });
 
diff --git a/modules/@angular/upgrade/test/static/integration/downgrade_component_spec.ts b/modules/@angular/upgrade/test/static/integration/downgrade_component_spec.ts
index 25783719e2..59339416dc 100644
--- a/modules/@angular/upgrade/test/static/integration/downgrade_component_spec.ts
+++ b/modules/@angular/upgrade/test/static/integration/downgrade_component_spec.ts
@@ -13,7 +13,7 @@ import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
 import * as angular from '@angular/upgrade/src/common/angular1';
 import {UpgradeModule, downgradeComponent} from '@angular/upgrade/static';
 
-import {bootstrap, html, multiTrim} from '../test_helpers';
+import {$apply, bootstrap, html, multiTrim} from '../test_helpers';
 
 export function main() {
   describe('downgrade ng2 component', () => {
@@ -22,15 +22,18 @@ export function main() {
     afterEach(() => destroyPlatform());
 
     it('should bind properties, events', async(() => {
-
-         const ng1Module = angular.module('ng1', []).run(($rootScope: angular.IScope) => {
-           $rootScope['dataA'] = 'A';
-           $rootScope['dataB'] = 'B';
-           $rootScope['modelA'] = 'initModelA';
-           $rootScope['modelB'] = 'initModelB';
-           $rootScope['eventA'] = '?';
-           $rootScope['eventB'] = '?';
-         });
+         const ng1Module =
+             angular.module('ng1', []).value('$exceptionHandler', (err: any) => {
+                                        throw err;
+                                      }).run(($rootScope: angular.IScope) => {
+               $rootScope['name'] = 'world';
+               $rootScope['dataA'] = 'A';
+               $rootScope['dataB'] = 'B';
+               $rootScope['modelA'] = 'initModelA';
+               $rootScope['modelB'] = 'initModelB';
+               $rootScope['eventA'] = '?';
+               $rootScope['eventB'] = '?';
+             });
 
          @Component({
            selector: 'ng2',
@@ -94,9 +97,10 @@ export function main() {
                  break;
                case 1:
                  assertChange('twoWayA', 'newA');
+                 assertChange('twoWayB', 'newB');
                  break;
                case 2:
-                 assertChange('twoWayB', 'newB');
+                 assertChange('interpolate', 'Hello everyone');
                  break;
                default:
                  throw new Error('Called too many times! ' + JSON.stringify(changes));
@@ -125,7 +129,7 @@ export function main() {
 
          const element = html(`
            <div>
-             <ng2 literal="Text" interpolate="Hello {{'world'}}"
+             <ng2 literal="Text" interpolate="Hello {{name}}"
                  bind-one-way-a="dataA" [one-way-b]="dataB"
                  bindon-two-way-a="modelA" [(two-way-b)]="modelB"
                  on-event-a='eventA=$event' (event-b)="eventB=$event"></ng2>
@@ -139,6 +143,14 @@ export function main() {
                    'literal: Text; interpolate: Hello world; ' +
                    'oneWayA: A; oneWayB: B; twoWayA: newA; twoWayB: newB; (2) | ' +
                    'modelA: newA; modelB: newB; eventA: aFired; eventB: bFired;');
+
+           $apply(upgrade, 'name = "everyone"');
+           expect(multiTrim(document.body.textContent))
+               .toEqual(
+                   'ignore: -; ' +
+                   'literal: Text; interpolate: Hello everyone; ' +
+                   'oneWayA: A; oneWayB: B; twoWayA: newA; twoWayB: newB; (3) | ' +
+                   'modelA: newA; modelB: newB; eventA: aFired; eventB: bFired;');
          });
        }));
 
diff --git a/modules/@angular/upgrade/test/static/integration/upgrade_component_spec.ts b/modules/@angular/upgrade/test/static/integration/upgrade_component_spec.ts
index 812f55f8a8..855e9ede00 100644
--- a/modules/@angular/upgrade/test/static/integration/upgrade_component_spec.ts
+++ b/modules/@angular/upgrade/test/static/integration/upgrade_component_spec.ts
@@ -13,7 +13,7 @@ import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
 import * as angular from '@angular/upgrade/src/common/angular1';
 import {UpgradeComponent, UpgradeModule, downgradeComponent} from '@angular/upgrade/static';
 
-import {bootstrap, digest, html, multiTrim} from '../test_helpers';
+import {$digest, bootstrap, html, multiTrim} from '../test_helpers';
 
 export function main() {
   describe('upgrade ng1 component', () => {
@@ -530,7 +530,7 @@ export function main() {
 
              ng2ComponentInstance.dataA = 'foo2';
              ng2ComponentInstance.dataB = 'bar2';
-             digest(adapter);
+             $digest(adapter);
              tick();
 
              expect(multiTrim(element.textContent))
@@ -605,7 +605,7 @@ export function main() {
 
              ng2ComponentInstance.dataA = {value: 'foo2'};
              ng2ComponentInstance.dataB = {value: 'bar2'};
-             digest(adapter);
+             $digest(adapter);
              tick();
 
              expect(multiTrim(element.textContent))
@@ -682,7 +682,7 @@ export function main() {
 
              ng2ComponentInstance.dataA = {value: 'foo2'};
              ng2ComponentInstance.dataB = {value: 'bar2'};
-             digest(adapter);
+             $digest(adapter);
              tick();
 
              expect(multiTrim(element.textContent))
@@ -929,7 +929,7 @@ export function main() {
 
              ng1Controller1.outputA({value: 'foo again'});
              ng1Controller2.outputB('bar again');
-             digest(adapter);
+             $digest(adapter);
              tick();
 
              expect(ng1Controller0.inputA).toEqual({value: 'foo again'});
@@ -1010,7 +1010,7 @@ export function main() {
                  .toBe('ng1 - Data: [4,5] - Length: 2 | ng2 - Data: 4,5 - Length: 2');
 
              ng1Controller.$scope.outputA(6);
-             digest(adapter);
+             $digest(adapter);
              tick();
 
              expect(ng1Controller.$scope.inputA).toEqual([4, 5, 6]);
@@ -1858,7 +1858,7 @@ export function main() {
 
              // Change: Re-assign `data`
              ng2ComponentInstance.data = {foo: 'baz'};
-             digest(adapter);
+             $digest(adapter);
              tick();
 
              expect(scopeOnChanges.calls.count()).toBe(2);
@@ -1879,7 +1879,7 @@ export function main() {
 
              // No change: Update internal property
              ng2ComponentInstance.data.foo = 'qux';
-             digest(adapter);
+             $digest(adapter);
              tick();
 
              expect(scopeOnChanges.calls.count()).toBe(2);
@@ -1888,7 +1888,7 @@ export function main() {
 
              // Change: Re-assign `data` (even if it looks the same)
              ng2ComponentInstance.data = {foo: 'qux'};
-             digest(adapter);
+             $digest(adapter);
              tick();
 
              expect(scopeOnChanges.calls.count()).toBe(3);
@@ -2008,7 +2008,7 @@ export function main() {
 
              // Change: Re-assign `data`
              ng2ComponentInstance.data = {foo: 'baz'};
-             digest(adapter);
+             $digest(adapter);
              tick();
 
              expect(scopeOnChangesA.calls.count()).toBe(2);
@@ -2029,7 +2029,7 @@ export function main() {
 
              // No change: Update internal property
              ng2ComponentInstance.data.foo = 'qux';
-             digest(adapter);
+             $digest(adapter);
              tick();
 
              expect(scopeOnChangesA.calls.count()).toBe(2);
@@ -2039,7 +2039,7 @@ export function main() {
 
              // Change: Re-assign `data` (even if it looks the same)
              ng2ComponentInstance.data = {foo: 'qux'};
-             digest(adapter);
+             $digest(adapter);
              tick();
 
              expect(scopeOnChangesA.calls.count()).toBe(3);
@@ -2399,12 +2399,12 @@ export function main() {
              // Run a `$digest`
              // (Since it's the first one since the `$doCheck` watcher was added,
              //  the `watchFn` will be run twice.)
-             digest(adapter);
+             $digest(adapter);
              expect(controllerDoCheckA.calls.count()).toBe(3);
              expect(controllerDoCheckB.calls.count()).toBe(3);
 
              // Run another `$digest`
-             digest(adapter);
+             $digest(adapter);
              expect(controllerDoCheckA.calls.count()).toBe(4);
              expect(controllerDoCheckB.calls.count()).toBe(4);
            });
@@ -2474,11 +2474,11 @@ export function main() {
              expect(scopeDoCheck).not.toHaveBeenCalled();
 
              // Run a `$digest`
-             digest(adapter);
+             $digest(adapter);
              expect(scopeDoCheck).not.toHaveBeenCalled();
 
              // Run another `$digest`
-             digest(adapter);
+             $digest(adapter);
              expect(scopeDoCheck).not.toHaveBeenCalled();
            });
          }));
@@ -2788,7 +2788,7 @@ export function main() {
            expect(scopeDestroyListener).not.toHaveBeenCalled();
 
            ng2ComponentAInstance.destroyIt = true;
-           digest(adapter);
+           $digest(adapter);
 
            expect(scopeDestroyListener).toHaveBeenCalled();
          });
@@ -2952,7 +2952,7 @@ export function main() {
            // (Should not propagate upwards.)
            ng2ComponentBInstance.ng2BInputA = 'foo2';
            ng2ComponentBInstance.ng2BInputC = 'baz2';
-           digest(adapter);
+           $digest(adapter);
            tick();
 
            expect(multiTrim(document.body.textContent))
@@ -2962,7 +2962,7 @@ export function main() {
            // (Should propagate all the way up to `ng1ADataC` and back all the way down to
            // `ng2BInputC`.)
            ng2ComponentBInstance.ng2BOutputC.emit('baz3');
-           digest(adapter);
+           $digest(adapter);
            tick();
 
            expect(multiTrim(document.body.textContent))
@@ -2972,7 +2972,7 @@ export function main() {
            // (Should not propagate upwards, only downwards.)
            ng1ControllerXInstance.ng1XInputA = 'foo4';
            ng1ControllerXInstance.ng1XInputB = {value: 'bar4'};
-           digest(adapter);
+           $digest(adapter);
            tick();
 
            expect(multiTrim(document.body.textContent))
@@ -2981,7 +2981,7 @@ export function main() {
            // Update `ng1XInputC`.
            // (Should propagate upwards and downwards.)
            ng1ControllerXInstance.ng1XInputC = {value: 'baz5'};
-           digest(adapter);
+           $digest(adapter);
            tick();
 
            expect(multiTrim(document.body.textContent))
@@ -2990,7 +2990,7 @@ export function main() {
            // Update a property on `ng1XInputC`.
            // (Should propagate upwards and downwards.)
            ng1ControllerXInstance.ng1XInputC.value = 'baz6';
-           digest(adapter);
+           $digest(adapter);
            tick();
 
            expect(multiTrim(document.body.textContent))
@@ -2999,7 +2999,7 @@ export function main() {
            // Emit from `ng1XOutputA`.
            // (Should propagate upwards to `ng1ADataA` and back all the way down to `ng2BInputA`.)
            (ng1ControllerXInstance as any).ng1XOutputA({value: 'foo7'});
-           digest(adapter);
+           $digest(adapter);
            tick();
 
            expect(multiTrim(document.body.textContent))
@@ -3009,7 +3009,7 @@ export function main() {
            // (Should propagate upwards to `ng1ADataB`, but not downwards,
            //  since `ng1XInputB` has been re-assigned (i.e. `ng2ADataB !== ng1XInputB`).)
            (ng1ControllerXInstance as any).ng1XOutputB('bar8');
-           digest(adapter);
+           $digest(adapter);
            tick();
 
            expect(multiTrim(document.body.textContent))
@@ -3020,7 +3020,7 @@ export function main() {
            ng2ComponentAInstance.ng2ADataA = {value: 'foo9'};
            ng2ComponentAInstance.ng2ADataB = {value: 'bar9'};
            ng2ComponentAInstance.ng2ADataC = {value: 'baz9'};
-           digest(adapter);
+           $digest(adapter);
            tick();
 
            expect(multiTrim(document.body.textContent))
diff --git a/modules/@angular/upgrade/test/static/test_helpers.ts b/modules/@angular/upgrade/test/static/test_helpers.ts
index 14edabe1d9..903d3732fb 100644
--- a/modules/@angular/upgrade/test/static/test_helpers.ts
+++ b/modules/@angular/upgrade/test/static/test_helpers.ts
@@ -24,7 +24,12 @@ export function bootstrap(
   });
 }
 
-export function digest(adapter: UpgradeModule) {
+export function $apply(adapter: UpgradeModule, exp: angular.Ng1Expression) {
+  const $rootScope = adapter.$injector.get($ROOT_SCOPE) as angular.IRootScopeService;
+  $rootScope.$apply(exp);
+}
+
+export function $digest(adapter: UpgradeModule) {
   const $rootScope = adapter.$injector.get($ROOT_SCOPE) as angular.IRootScopeService;
   $rootScope.$digest();
 }