diff --git a/src/app/shared/testing/host-window-service.stub.ts b/src/app/shared/testing/host-window-service.stub.ts
index ecb8c26acbb..b64d6fbffcb 100644
--- a/src/app/shared/testing/host-window-service.stub.ts
+++ b/src/app/shared/testing/host-window-service.stub.ts
@@ -20,4 +20,8 @@ export class HostWindowServiceStub {
   isXsOrSm(): Observable<boolean> {
     return this.isXs();
   }
+
+  isMobile(): Observable<boolean> {
+    return this.isXs();
+  }
 }