diff --git a/src/app/item-page/mirador-viewer/mirador-viewer.component.spec.ts b/src/app/item-page/mirador-viewer/mirador-viewer.component.spec.ts
index bb47d7bd5f9..22c5835ffbb 100644
--- a/src/app/item-page/mirador-viewer/mirador-viewer.component.spec.ts
+++ b/src/app/item-page/mirador-viewer/mirador-viewer.component.spec.ts
@@ -11,6 +11,7 @@ import { createSuccessfulRemoteDataObject$ } from '../../shared/remote-data.util
 import { createPaginatedList } from '../../shared/testing/utils.test';
 import { of as observableOf } from 'rxjs';
 import { MiradorViewerService } from './mirador-viewer.service';
+import { HostWindowService } from '../../shared/host-window.service';
 
 
 function getItem(metadata: MetadataMap) {
@@ -39,7 +40,8 @@ describe('MiradorViewerComponent with search', () => {
       })],
       declarations: [MiradorViewerComponent],
       providers: [
-        { provide: BitstreamDataService, useValue: {} }
+        { provide: BitstreamDataService, useValue: {} },
+        { provide: HostWindowService, useValue: {} }
       ],
       schemas: [NO_ERRORS_SCHEMA]
     }).overrideComponent(MiradorViewerComponent, {
@@ -100,7 +102,8 @@ describe('MiradorViewerComponent with multiple images', () => {
       })],
       declarations: [MiradorViewerComponent],
       providers: [
-        { provide: BitstreamDataService, useValue: {} }
+        { provide: BitstreamDataService, useValue: {} },
+        { provide: HostWindowService, useValue: {} }
       ],
       schemas: [NO_ERRORS_SCHEMA]
     }).overrideComponent(MiradorViewerComponent, {
@@ -158,7 +161,8 @@ describe('MiradorViewerComponent with with a single image', () => {
       })],
       declarations: [MiradorViewerComponent],
       providers: [
-        { provide: BitstreamDataService, useValue: {} }
+        { provide: BitstreamDataService, useValue: {} },
+        { provide: HostWindowService, useValue: {} }
       ],
       schemas: [NO_ERRORS_SCHEMA]
     }).overrideComponent(MiradorViewerComponent, {
@@ -215,7 +219,8 @@ describe('MiradorViewerComponent in development mode', () => {
     }).overrideComponent(MiradorViewerComponent, {
       set: {
         providers: [
-          { provide: MiradorViewerService, useValue: viewerService }
+          { provide: MiradorViewerService, useValue: viewerService },
+          { provide: HostWindowService, useValue: {} }
         ]
       }
     }).compileComponents();