diff --git a/cypress/integration/errors.spec.js b/cypress/integration/errors.spec.js
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+/**
+ * Copyright (C) 2019  The Software Heritage developers
+ * See the AUTHORS file at the top-level directory of this distribution
+ * License: GNU Affero General Public License version 3, or any later version
+ * See top-level LICENSE file for more information
+ */
+
+import {httpGetJson} from '../utils';
+
+const unarchivedRepo = {
+  url: 'https://github.com/SoftwareHeritage/swh-web',
+  revisionSha1git: '7bf1b2f489f16253527807baead7957ca9e8adde',
+  snapshotSha1git: 'd9829223095de4bb529790de8ba4e4813e38672d',
+  rootDirSha1git: '7d887d96c0047a77e2e8c4ee9bb1528463677663',
+  readmeSha1git: 'b203ec39300e5b7e97b6e20986183cbd0b797859'
+};
+
+const archivedRepo = {
+  url: 'https://github.com/memononen/libtess2',
+  invalidSubDir: 'Source1'
+};
+
+const invalidChecksum = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa';
+
+const invalidPageUrl = '/invalidPath';
+
+function urlShouldShowError(url, error) {
+  cy.visit(url, {
+    failOnStatusCode: false
+  });
+  cy.get('.swh-http-error')
+    .should('be.visible');
+  cy.get('.swh-http-error-code')
+    .should('contain', error.code);
+  cy.get('.swh-http-error-desc')
+    .should('contain', error.msg);
+}
+
+describe('Test Errors for unarchived repositories', function() {
+  it('should display NotFoundExc for unarchived repo', function() {
+    const url = this.Urls.browse_origin_directory(unarchivedRepo.url);
+
+    urlShouldShowError(url, {
+      code: '404',
+      msg: 'NotFoundExc: Origin with url ' + unarchivedRepo.url + ' not found!'
+    });
+  });
+
+  it('should display NotFoundExc for unarchived content', function() {
+    const url = this.Urls.browse_content(`sha1_git:${unarchivedRepo.readmeSha1git}`);
+
+    urlShouldShowError(url, {
+      code: '404',
+      msg: 'NotFoundExc: Content with sha1_git checksum equals to ' + unarchivedRepo.readmeSha1git + ' not found!'
+    });
+  });
+
+  it('should display NotFoundExc for unarchived directory sha1git', function() {
+    const url = this.Urls.browse_directory(unarchivedRepo.rootDirSha1git);
+
+    urlShouldShowError(url, {
+      code: '404',
+      msg: 'NotFoundExc: Directory with sha1_git ' + unarchivedRepo.rootDirSha1git + ' not found'
+    });
+  });
+
+  it('should display NotFoundExc for unarchived revision sha1git', function() {
+    const url = this.Urls.browse_revision(unarchivedRepo.revisionSha1git);
+
+    urlShouldShowError(url, {
+      code: '404',
+      msg: 'NotFoundExc: Revision with sha1_git ' + unarchivedRepo.revisionSha1git + ' not found.'
+    });
+  });
+
+  it('should display NotFoundExc for unarchived snapshot sha1git', function() {
+    const url = this.Urls.browse_snapshot(unarchivedRepo.snapshotSha1git);
+
+    urlShouldShowError(url, {
+      code: '404',
+      msg: 'Snapshot with id ' + unarchivedRepo.snapshotSha1git + ' not found!'
+    });
+  });
+
+});
+
+describe('Test Errors for archived repositories', function() {
+  before(function() {
+    const url = this.Urls.browse_origin_directory(archivedRepo.url);
+    cy.visit(url);
+    cy.window().then(async win => {
+      const metadata = win.swh.webapp.getBrowsedSwhObjectMetadata();
+      const apiUrl = Cypress.config().baseUrl + this.Urls.api_1_directory(metadata.directory);
+      const dirContent = await httpGetJson(apiUrl);
+
+      archivedRepo.contentSha1git = dirContent.find(x => x.type === 'file').checksums.sha1_git;
+      archivedRepo.directorySha1git = metadata.directory;
+    });
+  });
+
+  it('should display NotFoundExc for invalid directory from archived repo', function() {
+    const rootDir = this.Urls.browse_origin_directory(archivedRepo.url);
+    const subDir = rootDir + archivedRepo.invalidSubDir;
+
+    urlShouldShowError(subDir, {
+      code: '404',
+      msg: 'NotFoundExc: Directory entry with path ' +
+            archivedRepo.invalidSubDir + ' from ' +
+            archivedRepo.directorySha1git + ' not found'
+    });
+  });
+
+  it(`should display NotFoundExc for incorrect origin_url
+      with correct content hash`, function() {
+    const url = this.Urls.browse_content(`sha1_git:${archivedRepo.contentSha1git}`) +
+                `?origin_url=${unarchivedRepo.url}`;
+    urlShouldShowError(url, {
+      code: '404',
+      msg: 'The Software Heritage archive has a content ' +
+           'with the hash you provided but the origin ' +
+           'mentioned in your request appears broken: ' +
+           unarchivedRepo.url + '. ' +
+           'Please check the URL and try again.\n\n' +
+           'Nevertheless, you can still browse the content ' +
+           'without origin information: ' +
+           '/browse/content/sha1_git:' +
+           archivedRepo.contentSha1git + '/'
+    });
+  });
+});
+
+describe('Test errors for invalid data', function() {
+  it(`should display 400 for invalid checksum for 
+      directory, snapshot, revision, content`, function() {
+    const types = ['directory', 'snapshot', 'revision', 'content'];
+    for (let type of types) {
+      const url = this.Urls[`browse_${type}`](invalidChecksum);
+      urlShouldShowError(url, {
+        code: '400',
+        msg: 'BadInputExc: Invalid checksum query string ' +
+              invalidChecksum
+      });
+    }
+  });
+
+  it('should show 404 error for invalid path', function() {
+    urlShouldShowError(invalidPageUrl, {
+      code: '404',
+      msg: 'The resource ' + invalidPageUrl +
+           ' could not be found on the server.'
+    });
+  });
+});