diff --git a/src/material/autocomplete/autocomplete.spec.ts b/src/material/autocomplete/autocomplete.spec.ts
index 9632f858a588..2016cd689100 100644
--- a/src/material/autocomplete/autocomplete.spec.ts
+++ b/src/material/autocomplete/autocomplete.spec.ts
@@ -10,14 +10,12 @@ import {
   dispatchFakeEvent,
   dispatchKeyboardEvent,
   dispatchMouseEvent,
-  MockNgZone,
   typeInElement,
 } from '@angular/cdk/testing/private';
 import {
   ChangeDetectionStrategy,
   Component,
   ElementRef,
-  NgZone,
   OnDestroy,
   OnInit,
   Provider,
@@ -58,7 +56,6 @@ import {
 
 describe('MDC-based MatAutocomplete', () => {
   let overlayContainerElement: HTMLElement;
-  let zone: MockNgZone;
 
   // Creates a test component fixture.
   function createComponent<T>(component: Type<T>, providers: Provider[] = []) {
@@ -72,7 +69,7 @@ describe('MDC-based MatAutocomplete', () => {
         NoopAnimationsModule,
         OverlayModule,
       ],
-      providers: [{provide: NgZone, useFactory: () => (zone = new MockNgZone())}, ...providers],
+      providers: [...providers],
       declarations: [component],
     });
 
@@ -163,25 +160,19 @@ describe('MDC-based MatAutocomplete', () => {
         .toContain('California');
     });
 
-    it('should show the panel when the first open is after the initial zone stabilization', waitForAsync(() => {
-      // Note that we're running outside the Angular zone, in order to be able
-      // to test properly without the subscription from `_subscribeToClosingActions`
-      // giving us a false positive.
-      fixture.ngZone!.runOutsideAngular(() => {
-        fixture.componentInstance.trigger.openPanel();
+    it('should show the panel when the first open is after the initial render', waitForAsync(() => {
+      fixture.componentInstance.trigger.openPanel();
 
-        Promise.resolve().then(() => {
-          expect(fixture.componentInstance.panel.showPanel)
-            .withContext(`Expected panel to be visible.`)
-            .toBe(true);
-        });
+      Promise.resolve().then(() => {
+        expect(fixture.componentInstance.panel.showPanel)
+          .withContext(`Expected panel to be visible.`)
+          .toBe(true);
       });
     }));
 
     it('should close the panel when the user clicks away', fakeAsync(() => {
       dispatchFakeEvent(input, 'focusin');
       fixture.detectChanges();
-      zone.simulateZoneExit();
       dispatchFakeEvent(document, 'click');
       tick();
 
@@ -196,7 +187,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should close the panel when the user clicks away via auxilliary button', fakeAsync(() => {
       dispatchFakeEvent(input, 'focusin');
       fixture.detectChanges();
-      zone.simulateZoneExit();
       dispatchFakeEvent(document, 'auxclick');
       tick();
 
@@ -225,7 +215,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should close the panel when an option is clicked', fakeAsync(() => {
       dispatchFakeEvent(input, 'focusin');
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const option = overlayContainerElement.querySelector('mat-option') as HTMLElement;
       option.click();
@@ -243,7 +232,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should close the panel when a newly created option is clicked', fakeAsync(() => {
       dispatchFakeEvent(input, 'focusin');
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       // Filter down the option list to a subset of original options ('Alabama', 'California')
       typeInElement(input, 'al');
@@ -331,7 +319,6 @@ describe('MDC-based MatAutocomplete', () => {
         .withContext('Expected label to float as soon as panel opens.')
         .toEqual('always');
 
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       const options = overlayContainerElement.querySelectorAll(
@@ -603,7 +590,6 @@ describe('MDC-based MatAutocomplete', () => {
 
     dispatchFakeEvent(input, 'focusin');
     fixture.detectChanges();
-    zone.simulateZoneExit();
 
     expect(fixture.componentInstance.trigger.panelOpen)
       .withContext('Expected panel to be opened on focus.')
@@ -629,7 +615,6 @@ describe('MDC-based MatAutocomplete', () => {
 
     dispatchFakeEvent(input, 'focusin');
     fixture.detectChanges();
-    zone.simulateZoneExit();
 
     expect(fixture.componentInstance.trigger.panelOpen)
       .withContext('Expected panel to be opened on focus.')
@@ -712,7 +697,6 @@ describe('MDC-based MatAutocomplete', () => {
 
     fixture.componentInstance.trigger.openPanel();
     fixture.detectChanges();
-    zone.simulateZoneExit();
 
     // Select an option and reopen the panel.
     (overlayContainerElement.querySelector('mat-option') as HTMLElement).click();
@@ -721,7 +705,6 @@ describe('MDC-based MatAutocomplete', () => {
     fixture.detectChanges();
     fixture.componentInstance.trigger.openPanel();
     fixture.detectChanges();
-    zone.simulateZoneExit();
 
     expect(fixture.componentInstance.options.first.selected).toBe(true);
 
@@ -742,7 +725,6 @@ describe('MDC-based MatAutocomplete', () => {
 
     fixture.componentInstance.trigger.openPanel();
     fixture.detectChanges();
-    zone.simulateZoneExit();
 
     // Select an option and reopen the panel.
     (overlayContainerElement.querySelector('mat-option') as HTMLElement).click();
@@ -751,7 +733,6 @@ describe('MDC-based MatAutocomplete', () => {
     fixture.detectChanges();
     fixture.componentInstance.trigger.openPanel();
     fixture.detectChanges();
-    zone.simulateZoneExit();
 
     expect(fixture.componentInstance.options.first.selected).toBe(true);
 
@@ -778,7 +759,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should update control value as user types with input value', () => {
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       typeInElement(input, 'a');
       fixture.detectChanges();
@@ -811,7 +791,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should update control value when option is selected with option value', fakeAsync(() => {
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const options = overlayContainerElement.querySelectorAll(
         'mat-option',
@@ -827,7 +806,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should update the control back to a string if user types after an option is selected', fakeAsync(() => {
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const options = overlayContainerElement.querySelectorAll(
         'mat-option',
@@ -848,7 +826,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should fill the text field with display value when an option is selected', fakeAsync(() => {
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const options = overlayContainerElement.querySelectorAll(
         'mat-option',
@@ -864,7 +841,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should fill the text field with value if displayWith is not set', fakeAsync(() => {
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       fixture.componentInstance.panel.displayWith = null;
       fixture.componentInstance.options.toArray()[1].value = 'test value';
@@ -909,7 +885,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should clear the previous selection when reactive form field is reset programmatically', fakeAsync(() => {
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const options = overlayContainerElement.querySelectorAll(
         'mat-option',
@@ -976,7 +951,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const options = overlayContainerElement.querySelectorAll(
         'mat-option',
@@ -1074,7 +1048,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
     }));
 
     it('should not focus the option when DOWN key is pressed', () => {
@@ -1634,7 +1607,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
       const container = document.querySelector('.mat-mdc-autocomplete-panel') as HTMLElement;
 
@@ -1664,7 +1636,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
       const container = document.querySelector('.mat-mdc-autocomplete-panel') as HTMLElement;
 
@@ -1751,7 +1722,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
       const container = document.querySelector('.mat-mdc-autocomplete-panel') as HTMLElement;
 
@@ -1976,7 +1946,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should restore focus to the input when clicking to select a value', fakeAsync(() => {
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const option = overlayContainerElement.querySelector('mat-option') as HTMLElement;
 
@@ -2009,7 +1978,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       const inputBottom = inputReference.getBoundingClientRect().bottom;
@@ -2068,7 +2036,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       const inputTop = inputReference.getBoundingClientRect().top;
@@ -2100,7 +2067,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       let panel = overlayContainerElement.querySelector('.cdk-overlay-pane')!;
       let initialPanelHeight = panel.getBoundingClientRect().height;
@@ -2116,7 +2082,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       panel = overlayContainerElement.querySelector('.cdk-overlay-pane')!;
 
@@ -2136,7 +2101,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       typeInElement(input, 'f');
       fixture.detectChanges();
@@ -2169,7 +2133,6 @@ describe('MDC-based MatAutocomplete', () => {
 
         dispatchFakeEvent(inputEl, 'focusin');
         fixture.detectChanges();
-        zone.simulateZoneExit();
         fixture.detectChanges();
 
         let panel = overlayContainerElement.querySelector('.mat-mdc-autocomplete-panel')!;
@@ -2217,7 +2180,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       const inputBottom = inputReference.getBoundingClientRect().bottom;
@@ -2243,7 +2205,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       const inputTop = inputReference.getBoundingClientRect().top;
@@ -2264,7 +2225,6 @@ describe('MDC-based MatAutocomplete', () => {
       let openPanel = () => {
         fixture.componentInstance.trigger.openPanel();
         fixture.detectChanges();
-        zone.simulateZoneExit();
         fixture.detectChanges();
       };
 
@@ -2317,7 +2277,6 @@ describe('MDC-based MatAutocomplete', () => {
       ) as NodeListOf<HTMLElement>;
       options[0].click();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       let componentOptions = fixture.componentInstance.options.toArray();
@@ -2346,7 +2305,6 @@ describe('MDC-based MatAutocomplete', () => {
       ) as NodeListOf<HTMLElement>;
       options[0].click();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       let componentOptions = fixture.componentInstance.options.toArray();
@@ -2368,7 +2326,6 @@ describe('MDC-based MatAutocomplete', () => {
       fixture.componentInstance.trigger.autocomplete.autoActiveFirstOption = true;
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       expect(overlayContainerElement.querySelectorAll('mat-option')[0].classList)
@@ -2386,7 +2343,6 @@ describe('MDC-based MatAutocomplete', () => {
         testComponent.states[1].disabled = true;
         testComponent.trigger.openPanel();
         fixture.detectChanges();
-        zone.simulateZoneExit();
         fixture.detectChanges();
 
         expect(overlayContainerElement.querySelectorAll('mat-option')[2].classList)
@@ -2403,7 +2359,6 @@ describe('MDC-based MatAutocomplete', () => {
       }
       testComponent.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       const selectedOptions = overlayContainerElement.querySelectorAll(
@@ -2422,7 +2377,6 @@ describe('MDC-based MatAutocomplete', () => {
       fixture.componentInstance.trigger.autocomplete.autoActiveFirstOption = true;
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       expect(input.getAttribute('aria-activedescendant'))
@@ -2444,7 +2398,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       // Note: should not have a detectChanges call here
       // in order for the test to fail when it's supposed to.
 
@@ -2463,7 +2416,6 @@ describe('MDC-based MatAutocomplete', () => {
       fixture.detectChanges();
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       expect(overlayContainerElement.querySelectorAll('mat-option')[0].classList)
@@ -2486,13 +2438,11 @@ describe('MDC-based MatAutocomplete', () => {
       fixture.detectChanges();
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const option = overlayContainerElement.querySelector('mat-option') as HTMLElement;
 
       option.click();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       expect(spy).toHaveBeenCalledWith(jasmine.any(MatOptionSelectionChange));
       subscription!.unsubscribe();
@@ -2505,10 +2455,8 @@ describe('MDC-based MatAutocomplete', () => {
         fixture.detectChanges();
         fixture.componentInstance.trigger.openPanel();
         fixture.detectChanges();
-        zone.simulateZoneExit();
         (overlayContainerElement.querySelector('mat-option') as HTMLElement).click();
         fixture.detectChanges();
-        zone.simulateZoneExit();
       };
 
       fixture.componentInstance.states = [{code: 'OR', name: 'Oregon'}];
@@ -2537,7 +2485,6 @@ describe('MDC-based MatAutocomplete', () => {
       typeInElement(input, 'Cali');
       fixture.detectChanges();
       tick();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       const inputBottom = inputReference.getBoundingClientRect().bottom;
@@ -2564,7 +2511,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should clear the selected option when the input value is cleared', fakeAsync(() => {
       fixture.componentInstance.trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const input = fixture.nativeElement.querySelector('input');
       const option = overlayContainerElement.querySelector('mat-option') as HTMLElement;
@@ -2604,7 +2550,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const options = overlayContainerElement.querySelectorAll(
         'mat-option',
@@ -2636,7 +2581,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const options = overlayContainerElement.querySelectorAll(
         'mat-option',
@@ -2669,7 +2613,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       for (let i = 0; i < 5; i++) {
         dispatchKeyboardEvent(input, 'keydown', DOWN_ARROW);
@@ -2697,7 +2640,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const spy = jasmine.createSpy('optionSelected spy');
       const subscription = trigger.optionSelections.subscribe(spy);
@@ -2735,7 +2677,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const spy = jasmine.createSpy('optionSelected spy');
       const subscription = trigger.optionSelections.subscribe(spy);
@@ -2766,7 +2707,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const spy = jasmine.createSpy('optionSelected spy');
       const subscription = trigger.optionSelections.subscribe(spy);
@@ -2791,7 +2731,6 @@ describe('MDC-based MatAutocomplete', () => {
       // Simulate opening the input and clicking the first option.
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       (overlayContainerElement.querySelector('mat-option') as HTMLElement).click();
       tick();
       fixture.detectChanges();
@@ -2806,7 +2745,6 @@ describe('MDC-based MatAutocomplete', () => {
       fixture.detectChanges();
       dispatchFakeEvent(input, 'input');
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       expect(trigger.panelOpen).toBe(true);
       expect(input.value).toBe('Alabam');
@@ -2869,7 +2807,6 @@ describe('MDC-based MatAutocomplete', () => {
       const tabEvent = createKeyboardEvent('keydown', TAB);
 
       input.focus();
-      zone.simulateZoneExit();
 
       trigger._handleKeydown(tabEvent);
 
@@ -2899,7 +2836,6 @@ describe('MDC-based MatAutocomplete', () => {
     it('should not prevent escape key propagation when there are no options', () => {
       fixture.componentInstance.filteredStates = fixture.componentInstance.states = [];
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       const event = createKeyboardEvent('keydown', ESCAPE);
       spyOn(event, 'stopPropagation').and.callThrough();
@@ -3110,7 +3046,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
 
       expect(trigger.panelOpen).withContext('Expected panel to be open.').toBe(true);
 
@@ -3165,7 +3100,6 @@ describe('MDC-based MatAutocomplete', () => {
 
         trigger.openPanel();
         fixture.detectChanges();
-        zone.simulateZoneExit();
         fixture.detectChanges();
 
         expect(stateCtrl.value).toBeFalsy();
@@ -3197,7 +3131,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
       typeInElement(input, 'al');
       fixture.detectChanges();
@@ -3253,7 +3186,6 @@ describe('MDC-based MatAutocomplete', () => {
 
         trigger.openPanel();
         fixture.detectChanges();
-        zone.simulateZoneExit();
         fixture.detectChanges();
 
         expect(stateCtrl.value).toBeFalsy();
@@ -3279,7 +3211,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       expect(stateCtrl.value).toBeFalsy();
@@ -3304,7 +3235,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       expect(stateCtrl.value).toBeFalsy();
@@ -3329,7 +3259,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       expect(stateCtrl.value).toBeFalsy();
@@ -3354,7 +3283,6 @@ describe('MDC-based MatAutocomplete', () => {
 
       trigger.openPanel();
       fixture.detectChanges();
-      zone.simulateZoneExit();
       fixture.detectChanges();
 
       expect(stateCtrl.value).toBeFalsy();
@@ -3554,7 +3482,6 @@ describe('MDC-based MatAutocomplete', () => {
 
     fixture.detectChanges();
     fixture.componentInstance.trigger.openPanel();
-    zone.simulateZoneExit();
     fixture.detectChanges();
 
     let options = overlayContainerElement.querySelectorAll('mat-option') as NodeListOf<HTMLElement>;
@@ -3579,7 +3506,6 @@ describe('MDC-based MatAutocomplete', () => {
     const input = fixture.nativeElement.querySelector('input');
 
     fixture.componentInstance.trigger.openPanel();
-    zone.simulateZoneExit();
     fixture.detectChanges();
 
     const options = overlayContainerElement.querySelectorAll(
@@ -3628,7 +3554,6 @@ describe('MDC-based MatAutocomplete', () => {
 
     fixture.detectChanges();
     fixture.componentInstance.trigger.openPanel();
-    zone.simulateZoneExit();
     fixture.detectChanges();
 
     const input = fixture.nativeElement.querySelector('input');
@@ -3656,7 +3581,6 @@ describe('MDC-based MatAutocomplete', () => {
 
     fixture.detectChanges();
     fixture.componentInstance.trigger.openPanel();
-    zone.simulateZoneExit();
     fixture.detectChanges();
 
     const input = fixture.nativeElement.querySelector('input');
@@ -3681,7 +3605,6 @@ describe('MDC-based MatAutocomplete', () => {
     fixture.detectChanges();
     fixture.componentInstance.trigger.openPanel();
     fixture.detectChanges();
-    zone.simulateZoneExit();
 
     const overlayRect = overlayContainerElement
       .querySelector('.cdk-overlay-pane')!
@@ -3699,7 +3622,6 @@ describe('MDC-based MatAutocomplete', () => {
     fixture.detectChanges();
     fixture.componentInstance.trigger.openPanel();
     fixture.detectChanges();
-    zone.simulateZoneExit();
 
     fixture.componentInstance.trigger.closePanel();
     fixture.detectChanges();
@@ -3709,7 +3631,6 @@ describe('MDC-based MatAutocomplete', () => {
 
     fixture.componentInstance.trigger.openPanel();
     fixture.detectChanges();
-    zone.simulateZoneExit();
 
     const overlayRect = overlayContainerElement
       .querySelector('.cdk-overlay-pane')!
@@ -3758,7 +3679,6 @@ describe('MDC-based MatAutocomplete', () => {
     fixture.detectChanges();
     fixture.componentInstance.trigger.openPanel();
     fixture.detectChanges();
-    zone.simulateZoneExit();
 
     expect(fixture.componentInstance.trigger.panelOpen).toBe(true);
 
@@ -3769,31 +3689,6 @@ describe('MDC-based MatAutocomplete', () => {
     expect(fixture.componentInstance.trigger.panelOpen).toBe(true);
   });
 
-  it('should emit from `autocomplete.closed` after click outside inside the NgZone', fakeAsync(() => {
-    const inZoneSpy = jasmine.createSpy('in zone spy');
-
-    const fixture = createComponent(SimpleAutocomplete, [
-      {provide: NgZone, useFactory: () => new NgZone({enableLongStackTrace: false})},
-    ]);
-    const ngZone = TestBed.inject(NgZone);
-    fixture.detectChanges();
-
-    fixture.componentInstance.trigger.openPanel();
-    fixture.detectChanges();
-    flush();
-
-    const subscription = fixture.componentInstance.trigger.autocomplete.closed.subscribe(() =>
-      inZoneSpy(NgZone.isInAngularZone()),
-    );
-    ngZone.onStable.emit(null);
-
-    dispatchFakeEvent(document, 'click');
-
-    expect(inZoneSpy).toHaveBeenCalledWith(true);
-
-    subscription.unsubscribe();
-  }));
-
   describe('a11y', () => {
     it('should display checkmark for selection by default', () => {
       const fixture = createComponent(AutocompleteWithNgModel);