diff --git a/package-lock.json b/package-lock.json
index 41a97f3b2..0dd5f028a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13614,9 +13614,9 @@
       "dev": true
     },
     "prettier": {
-      "version": "2.0.5",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.0.5.tgz",
-      "integrity": "sha512-7PtVymN48hGcO4fGjybyBSIWDsLU4H4XlvOHfq91pz9kkGlonzwTfYkaIEwiRg/dAJF9YlbsduBAgtYLi+8cFg==",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.1.0.tgz",
+      "integrity": "sha512-lz28cCbA1cDFHVuY8vvj6QuqOwIpyIfPUYkSl8AZ/vxH8qBXMMjE2knfLHCrZCmUsK/H1bg1P0tOo0dJkTJHvw==",
       "dev": true
     },
     "process": {
diff --git a/package.json b/package.json
index a315603c1..e5ec11c67 100644
--- a/package.json
+++ b/package.json
@@ -105,7 +105,7 @@
     "lint-staged": "^10.2.11",
     "ng-packagr": "^10.0.4",
     "node-stream-zip": "^1.11.3",
-    "prettier": "^2.0.5",
+    "prettier": "^2.1.0",
     "protractor": "^7.0.0",
     "protractor-retry": "^1.2.13",
     "protractor-smartrunner": "^0.1.1",
diff --git a/src/app/directives/library-favorite.directive.spec.ts b/src/app/directives/library-favorite.directive.spec.ts
index bc6f9635e..75407f15e 100644
--- a/src/app/directives/library-favorite.directive.spec.ts
+++ b/src/app/directives/library-favorite.directive.spec.ts
@@ -26,16 +26,12 @@
 import { Component, ViewChild } from '@angular/core';
 import { LibraryFavoriteDirective } from './library-favorite.directive';
 import { AlfrescoApiService, AlfrescoApiServiceMock, setupTestBed, CoreModule } from '@alfresco/adf-core';
-import { TestBed, async } from '@angular/core/testing';
+import { TestBed, async, ComponentFixture } from '@angular/core/testing';
 import { TranslateModule } from '@ngx-translate/core';
 
 @Component({
   selector: 'app-test-component',
-  template: `
-    <button #favoriteLibrary="favoriteLibrary" [acaFavoriteLibrary]="selection">
-      Favorite
-    </button>
-  `
+  template: ` <button #favoriteLibrary="favoriteLibrary" [acaFavoriteLibrary]="selection">Favorite</button> `
 })
 class TestComponent {
   @ViewChild('favoriteLibrary')
@@ -45,10 +41,10 @@ class TestComponent {
 }
 
 describe('LibraryFavoriteDirective', () => {
-  let fixture;
-  let api;
-  let component;
-  let selection;
+  let fixture: ComponentFixture<TestComponent>;
+  let api: AlfrescoApiService;
+  let component: TestComponent;
+  let selection: { entry: { guid: string; id: string } };
 
   setupTestBed({
     imports: [TranslateModule.forRoot(), CoreModule.forRoot()],
@@ -76,7 +72,7 @@ describe('LibraryFavoriteDirective', () => {
   });
 
   it('should mark selection as favorite when getFavoriteSite returns successfully', async(() => {
-    spyOn(api.peopleApi, 'getFavoriteSite').and.returnValue(Promise.resolve());
+    spyOn(api.peopleApi, 'getFavoriteSite').and.returnValue(Promise.resolve(null));
     component.selection = selection;
     fixture.detectChanges();
 
@@ -99,7 +95,7 @@ describe('LibraryFavoriteDirective', () => {
 
   it('should call addFavorite() on click event when selection is not a favorite', async(() => {
     spyOn(api.peopleApi, 'getFavoriteSite').and.returnValue(Promise.reject());
-    spyOn(api.peopleApi, 'addFavorite').and.returnValue(Promise.resolve());
+    spyOn(api.peopleApi, 'addFavorite').and.returnValue(Promise.resolve(null));
     component.selection = selection;
     fixture.detectChanges();
 
@@ -115,7 +111,7 @@ describe('LibraryFavoriteDirective', () => {
   }));
 
   it('should call removeFavoriteSite() on click event when selection is not a favorite', async(() => {
-    spyOn(api.peopleApi, 'getFavoriteSite').and.returnValue(Promise.resolve());
+    spyOn(api.peopleApi, 'getFavoriteSite').and.returnValue(Promise.resolve(null));
     spyOn(api.favoritesApi, 'removeFavoriteSite').and.returnValue(Promise.resolve());
     component.selection = selection;
     fixture.detectChanges();