diff --git a/e2e/suites/actions/mark-favorite.test.ts b/e2e/suites/actions/mark-favorite.test.ts
index 9fc59e582..3f4afadcb 100644
--- a/e2e/suites/actions/mark-favorite.test.ts
+++ b/e2e/suites/actions/mark-favorite.test.ts
@@ -24,7 +24,7 @@
  */
 
 import { LoginPage, BrowsingPage } from '../../pages/pages';
-import { SITE_VISIBILITY } from '../../configs';
+import { SITE_VISIBILITY, SITE_ROLES } from '../../configs';
 import { RepoClient } from '../../utilities/repo-client/repo-client';
 import { Utils } from '../../utilities/utils';
 
@@ -494,4 +494,60 @@ describe('Mark items as favorites', () => {
             await apis.user.favorites.waitForApi({ expect: 5 });
         });
     });
+
+    describe('on a library', () => {
+      const adminSite1 = `adminSite1-${Utils.random()}`;
+      const adminSite2 = `adminSite2-${Utils.random()}`;
+      const adminSite3 = `adminSite3-${Utils.random()}`;
+
+      beforeAll(async (done) => {
+        await apis.admin.sites.createSite(adminSite1);
+        await apis.admin.sites.createSite(adminSite2);
+        await apis.admin.sites.createSite(adminSite3);
+        await apis.admin.sites.addSiteMember(adminSite1, username, SITE_ROLES.SITE_CONSUMER.ROLE);
+        await apis.admin.sites.addSiteMember(adminSite2, username, SITE_ROLES.SITE_CONSUMER.ROLE);
+        await apis.admin.sites.addSiteMember(adminSite3, username, SITE_ROLES.SITE_CONSUMER.ROLE);
+
+        await apis.user.favorites.addFavoriteById('site', adminSite2);
+        await apis.user.favorites.addFavoriteById('site', adminSite3);
+        done();
+      });
+
+      beforeEach(async (done) => {
+        await Utils.pressEscape();
+        done();
+      });
+
+      afterAll(async (done) => {
+        await apis.admin.sites.deleteSite(adminSite1);
+        await apis.admin.sites.deleteSite(adminSite2);
+        await apis.admin.sites.deleteSite(adminSite3);
+        done();
+      });
+
+      it('Mark a library as favorite - [C289974]', async () => {
+        await page.goToMyLibraries();
+        await dataTable.selectItem(adminSite1);
+        await toolbar.openMoreMenu();
+        await toolbar.menu.clickMenuItem('Favorite');
+        expect(await apis.user.favorites.isFavoriteWithRetry(adminSite1, { expect: true })).toBe(true, `${adminSite1} not favorite`);
+      });
+
+      it('Remove a library from favorites - on My Libraries - [C289975]', async () => {
+        await page.goToMyLibraries();
+        await dataTable.selectItem(adminSite2);
+        await toolbar.openMoreMenu();
+        await toolbar.menu.clickMenuItem('Favorite');
+        expect(await apis.user.favorites.isFavoriteWithRetry(adminSite2, { expect: false })).toBe(false, `${adminSite2} still favorite`);
+      });
+
+      it('Remove a library from favorites - on Favorite Libraries - [C289976]', async () => {
+        await page.goToFavoriteLibraries();
+        await dataTable.selectItem(adminSite3);
+        await toolbar.openMoreMenu();
+        await toolbar.menu.clickMenuItem('Favorite');
+        expect(await dataTable.getRowByName(adminSite3).isPresent()).toBe(false, `${adminSite3} is displayed`);
+        expect(await apis.user.favorites.isFavoriteWithRetry(adminSite3, { expect: false })).toBe(false, `${adminSite3} still favorite`);
+      });
+    });
 });
diff --git a/e2e/suites/actions/toolbar-single-selection.test.ts b/e2e/suites/actions/toolbar-single-selection.test.ts
index 838ffe269..895f8372f 100755
--- a/e2e/suites/actions/toolbar-single-selection.test.ts
+++ b/e2e/suites/actions/toolbar-single-selection.test.ts
@@ -103,6 +103,7 @@ describe('Toolbar actions - single selection : ', () => {
       expect(await toolbar.isButtonPresent('View details')).toBe(true, `View details is not displayed for ${siteName}`);
       await toolbar.openMoreMenu();
       expect(await toolbar.menu.isMenuItemPresent('Delete')).toBe(true, `Delete is not displayed for ${siteName}`);
+      expect(await toolbar.menu.isMenuItemPresent('Favorite')).toBe(true, `Favorite is not displayed for ${siteName}`);
     });
 
     it('Correct actions appear when a library is selected - Favorite Libraries - [C289892]', async () => {
@@ -112,6 +113,7 @@ describe('Toolbar actions - single selection : ', () => {
       expect(await toolbar.isButtonPresent('View details')).toBe(true, `View details is not displayed for ${siteName}`);
       await toolbar.openMoreMenu();
       expect(await toolbar.menu.isMenuItemPresent('Delete')).toBe(true, `Delete is not displayed for ${siteName}`);
+      expect(await toolbar.menu.isMenuItemPresent('Favorite')).toBe(true, `Favorite is not displayed for ${siteName}`);
     });
 
     it('selected row is marked with a check circle icon - [C213134]', async () => {
diff --git a/e2e/utilities/repo-client/apis/favorites/favorites-api.ts b/e2e/utilities/repo-client/apis/favorites/favorites-api.ts
index b744a91c9..f4fb0d1ad 100755
--- a/e2e/utilities/repo-client/apis/favorites/favorites-api.ts
+++ b/e2e/utilities/repo-client/apis/favorites/favorites-api.ts
@@ -79,13 +79,32 @@ export class FavoritesApi extends RepoApi {
 
     async getFavoriteById(nodeId: string) {
         await this.apiAuth();
-        return await this.alfrescoJsApi.core.favoritesApi.getFavorite('-me', nodeId);
+        return await this.alfrescoJsApi.core.favoritesApi.getFavorite('-me-', nodeId);
     }
 
     async isFavorite(nodeId: string) {
         return JSON.stringify((await this.getFavorites()).list.entries).includes(nodeId);
     }
 
+    async isFavoriteWithRetry(nodeId: string, data) {
+      let isFavorite;
+      try {
+        const favorite = async () => {
+          isFavorite = JSON.stringify((await this.getFavorites()).list.entries).includes(nodeId);
+          if ( isFavorite !== data.expect ) {
+            return Promise.reject(isFavorite);
+          } else {
+            return Promise.resolve(isFavorite);
+          }
+        };
+
+        return await Utils.retryCall(favorite);
+      } catch (error) {
+        console.log('-----> catch isFavoriteWithRetry: ', error);
+      }
+      return isFavorite;
+    }
+
     async removeFavoriteById(nodeId: string) {
         await this.apiAuth();
         return await this.alfrescoJsApi.core.peopleApi.removeFavoriteSite('-me-', nodeId);