diff --git a/e2e/suites/actions/mark-favorite.test.ts b/e2e/suites/actions/mark-favorite.test.ts
index ab91c9587..f5a7cba64 100644
--- a/e2e/suites/actions/mark-favorite.test.ts
+++ b/e2e/suites/actions/mark-favorite.test.ts
@@ -24,7 +24,7 @@
  */
 
 import { LoginPage, LogoutPage, BrowsingPage } from '../../pages/pages';
-import { SIDEBAR_LABELS } from '../../configs';
+import { SIDEBAR_LABELS, SITE_VISIBILITY } from '../../configs';
 import { RepoClient } from '../../utilities/repo-client/repo-client';
 import { Utils } from '../../utilities/utils';
 import { browser } from 'protractor';
@@ -37,8 +37,14 @@ describe('Mark items as favorites', () => {
     const file3Fav = `file-${Utils.random()}.txt`;
     const file4Fav = `file-${Utils.random()}.txt`;
     const folder1 = `folder-${Utils.random()}`;
+    const siteName = `site-public-${Utils.random()}`;
+    const fileSiteNotFav1 = `file-site${Utils.random()}.txt`;
+    const fileSiteNotFav2 = `file-site${Utils.random()}.txt`;
+    const folderSite = `folder-${Utils.random()}`;
+    const fileSiteFav1 = `file-${Utils.random()}.txt`;
+    const fileSiteFav2 = `file-${Utils.random()}.txt`;
 
-    let file1Id, file2Id, file3Id, file4Id, folder1Id;
+    let file1Id, file2Id, file3Id, file4Id, folder1Id, fileSiteNotFav1Id, fileSiteNotFav2Id, folderSiteId, fileSiteFav1Id, fileSiteFav2Id;
 
     const apis = {
         admin: new RepoClient(),
@@ -70,7 +76,8 @@ describe('Mark items as favorites', () => {
 
     afterAll(done => {
         Promise.all([
-            apis.user.nodes.deleteNodesById([ file1Id, file2Id, file3Id, file4Id, folder1Id ]),
+            apis.user.nodes.deleteNodesById([ file1Id, file2Id, file3Id, file4Id, folder1Id]),
+            apis.user.sites.deleteSite(siteName),
             logoutPage.load()
         ])
         .then(done);
@@ -423,4 +430,112 @@ describe('Mark items as favorites', () => {
         });
     });
 
+    describe ('on File Libraries', () => {
+        const fileLibrariesPage = new BrowsingPage();
+
+        beforeAll(async (done) => {
+            await apis.user.sites.createSite(siteName, SITE_VISIBILITY.PUBLIC);
+            const docLibId = (await apis.user.sites.getDocLibId(siteName));
+            folderSiteId = (await apis.user.nodes.createFolder(folderSite, docLibId)).entry.id;
+            fileSiteNotFav1Id = (await apis.user.nodes.createFile(fileSiteNotFav1, folderSiteId)).entry.id;
+            fileSiteFav1Id = (await apis.user.nodes.createFile(fileSiteFav1, folderSiteId)).entry.id;
+            fileSiteNotFav2Id = (await apis.user.nodes.createFile(fileSiteNotFav2, folderSiteId)).entry.id;
+            fileSiteFav2Id = (await apis.user.nodes.createFile(fileSiteFav2, folderSiteId)).entry.id;
+            await apis.user.favorites.addFavoriteById('file', fileSiteFav1Id);
+            await apis.user.favorites.addFavoriteById('file', fileSiteFav2Id);
+            done();
+        });
+
+        beforeEach(async (done) => {
+            await fileLibrariesPage.sidenav.navigateToLinkByLabel(SIDEBAR_LABELS.FILE_LIBRARIES);
+            await fileLibrariesPage.dataTable.waitForHeader();
+            await fileLibrariesPage.dataTable.doubleClickOnRowByName(siteName);
+            await fileLibrariesPage.dataTable.waitForHeader();
+            await toolbar.actions.closeMoreMenu();
+            done();
+        });
+
+        afterEach(async (done) => {
+            await browser.refresh();
+            done();
+        });
+
+        it('Favorite a folder - [C280391]', async  () => {
+            await dataTable.selectItem(folderSite);
+            await toolbar.actions.openMoreMenu();
+            await toolbar.actions.menu.clickMenuItem('Favorite');
+            await apis.user.favorites.waitForApi({ expect: 3 });
+            const isFavorite = await apis.user.favorites.isFavorite(folderSiteId);
+            expect(isFavorite).toBe(true, `${folderSite} not marked as favorite`);
+            await apis.user.favorites.removeFavoriteById(folderSiteId);
+        });
+
+        it('Favorite a file - [C280342]', async () => {
+            await fileLibrariesPage.dataTable.doubleClickOnRowByName(folderSite);
+            await dataTable.selectItem(fileSiteNotFav1);
+            await toolbar.actions.openMoreMenu();
+            await toolbar.actions.menu.clickMenuItem('Favorite');
+            await apis.user.favorites.waitForApi({ expect: 3 });
+            const isFavorite = await apis.user.favorites.isFavorite(fileSiteNotFav1Id);
+            expect(isFavorite).toBe(true, `${fileSiteNotFav1} not marked as favorite`);
+            await apis.user.favorites.removeFavoriteById(fileSiteNotFav1Id);
+        });
+
+        it('Unfavorite an item - [C280343]', async () => {
+            await fileLibrariesPage.dataTable.doubleClickOnRowByName(folderSite);
+            await dataTable.selectItem(fileSiteFav1);
+            await toolbar.actions.openMoreMenu();
+            await toolbar.actions.menu.clickMenuItem('Favorite');
+            await apis.user.favorites.waitForApi({ expect: 3 });
+            const isFavorite = await apis.user.favorites.isFavorite(fileSiteFav1Id);
+            expect(isFavorite).toBe(false, `${fileSiteFav1} is marked as favorite`);
+            await apis.user.favorites.addFavoriteById('file', fileSiteFav1Id);
+        });
+
+        it('Favorite multiple items - all unfavorite - [C280345]', async () => {
+            await fileLibrariesPage.dataTable.doubleClickOnRowByName(folderSite);
+            await dataTable.selectMultipleItems([ fileSiteNotFav1, fileSiteNotFav2 ]);
+            await toolbar.actions.openMoreMenu();
+            await toolbar.actions.menu.clickMenuItem('Favorite');
+            await apis.user.favorites.waitForApi({ expect: 4 });
+            const listItems1 = await Promise.all([
+                apis.user.favorites.isFavorite(fileSiteNotFav1Id),
+                apis.user.favorites.isFavorite(fileSiteNotFav2Id)
+                ]);
+            expect(listItems1[0]).toBe(true, 'item not marked as favorite');
+            expect(listItems1[1]).toBe(true, 'item not marked as favorite');
+            await apis.user.favorites.removeFavoriteById(fileSiteNotFav1Id);
+            await apis.user.favorites.removeFavoriteById(fileSiteNotFav2Id);
+        });
+
+        it('Unfavorite multiple items - [C280346]', async () => {
+            await fileLibrariesPage.dataTable.doubleClickOnRowByName(folderSite);
+            await dataTable.selectMultipleItems([ fileSiteFav1, fileSiteFav2 ]);
+            await toolbar.actions.openMoreMenu();
+            await toolbar.actions.menu.clickMenuItem('Favorite');
+            const listItems2 = await Promise.all([
+                apis.user.favorites.isFavorite(fileSiteFav1Id),
+                apis.user.favorites.isFavorite(fileSiteFav2Id)
+                ]);
+            expect(listItems2[0]).toBe(false, 'item marked as favorite');
+            expect(listItems2[1]).toBe(false, 'item marked as favorite');
+            await apis.user.favorites.addFavoriteById('file', fileSiteFav1Id);
+            await apis.user.favorites.addFavoriteById('file', fileSiteFav2Id);
+        });
+
+        it('Favorite multiple items - some favorite and some unfavorite - [C280347]', async () => {
+            await fileLibrariesPage.dataTable.doubleClickOnRowByName(folderSite);
+            await dataTable.selectMultipleItems([ fileSiteNotFav1, fileSiteFav1 ]);
+            await toolbar.actions.openMoreMenu();
+            await toolbar.actions.menu.clickMenuItem('Favorite');
+            await apis.user.favorites.waitForApi({ expect: 3 });
+            const listItems3 = await Promise.all([
+                apis.user.favorites.isFavorite(fileSiteNotFav1Id),
+                apis.user.favorites.isFavorite(fileSiteFav1)
+                ]);
+            expect(listItems3[0]).toBe(true, 'item not marked as favorite');
+            expect(listItems3[1]).toBe(true, 'item not marked as favorite');
+            await apis.user.favorites.removeFavoriteById(fileSiteNotFav1Id);
+        });
+    });
 });