diff --git a/static_src/elements/framework/mr-header/mr-header.test.js b/static_src/elements/framework/mr-header/mr-header.test.js
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+++ b/static_src/elements/framework/mr-header/mr-header.test.js
@@ -0,0 +1,191 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+
+import {prpcClient} from 'prpc-client-instance.js';
+import {MrHeader} from './mr-header.js';
+
+
+window.CS_env = {
+  token: 'foo-token',
+};
+
+let element;
+
+describe('mr-header', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-header');
+    document.body.appendChild(element);
+
+    window.ga = sinon.stub();
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrHeader);
+  });
+
+  it('presentationConfig renders', async () => {
+    element.projectName = 'best-project';
+    element.projectThumbnailUrl = 'http://images.google.com/';
+    element.presentationConfig = {
+      projectSummary: 'The best project',
+    };
+
+    await element.updateComplete;
+
+    assert.equal(element.shadowRoot.querySelector('.project-logo').src,
+        'http://images.google.com/');
+
+    assert.endsWith(element.shadowRoot.querySelector('.new-issue-link').href,
+        '/p/best-project/issues/entry');
+
+    assert.equal(element.shadowRoot.querySelector('.project-selector').title,
+        'The best project');
+  });
+
+  describe('issueEntryUrl', () => {
+    let oldToken;
+
+    beforeEach(() => {
+      oldToken = prpcClient.token;
+      prpcClient.token = 'token1';
+
+      element.projectName = 'proj';
+
+      sinon.stub(element, '_origin').get(() => 'http://localhost');
+    });
+
+    afterEach(() => {
+      prpcClient.token = oldToken;
+    });
+
+    it('updates on project change', async () => {
+      await element.updateComplete;
+
+      assert.endsWith(element.shadowRoot.querySelector('.new-issue-link').href,
+          '/p/proj/issues/entry');
+
+      element.projectName = 'the-best-project';
+
+      await element.updateComplete;
+
+      assert.endsWith(element.shadowRoot.querySelector('.new-issue-link').href,
+          '/p/the-best-project/issues/entry');
+    });
+
+    it('generates wizard URL when customIssueEntryUrl defined', () => {
+      element.presentationConfig = {customIssueEntryUrl: 'https://issue.wizard'};
+      element.userProjects = {ownerOf: ['not-proj']};
+      element.userDisplayName = 'test@example.com';
+      assert.equal(element.issueEntryUrl,
+          'https://issue.wizard?token=token1&role=&' +
+          'continue=http://localhost/p/proj/issues/entry.do');
+    });
+
+    it('uses default issue filing URL when user is not logged in', () => {
+      element.presentationConfig = {customIssueEntryUrl: 'https://issue.wizard'};
+      element.userDisplayName = '';
+      assert.equal(element.issueEntryUrl, '/p/proj/issues/entry');
+    });
+
+    it('uses default issue filing URL when user is project owner', () => {
+      element.presentationConfig = {customIssueEntryUrl: 'https://issue.wizard'};
+      element.userProjects = {ownerOf: ['proj']};
+      assert.equal(element.issueEntryUrl, '/p/proj/issues/entry');
+    });
+
+    it('uses default issue filing URL when user is project member', () => {
+      element.presentationConfig = {customIssueEntryUrl: 'https://issue.wizard'};
+      element.userProjects = {memberOf: ['proj']};
+      assert.equal(element.issueEntryUrl, '/p/proj/issues/entry');
+    });
+
+    it('uses default issue filing URL when user is project contributor', () => {
+      element.presentationConfig = {customIssueEntryUrl: 'https://issue.wizard'};
+      element.userProjects = {contributorTo: ['proj']};
+      assert.equal(element.issueEntryUrl, '/p/proj/issues/entry');
+    });
+  });
+
+
+  it('canAdministerProject is false when user is not logged in', () => {
+    element.userDisplayName = '';
+
+    assert.isFalse(element.canAdministerProject);
+  });
+
+  it('canAdministerProject is true when user is site admin', () => {
+    element.userDisplayName = 'test@example.com';
+    element.isSiteAdmin = true;
+
+    assert.isTrue(element.canAdministerProject);
+
+    element.isSiteAdmin = false;
+
+    assert.isFalse(element.canAdministerProject);
+  });
+
+  it('canAdministerProject is true when user is owner', () => {
+    element.userDisplayName = 'test@example.com';
+    element.isSiteAdmin = false;
+
+    element.projectName = 'chromium';
+    element.userProjects = {ownerOf: ['chromium']};
+
+    assert.isTrue(element.canAdministerProject);
+
+    element.projectName = 'v8';
+
+    assert.isFalse(element.canAdministerProject);
+
+    element.userProjects = {memberOf: ['v8']};
+
+    assert.isFalse(element.canAdministerProject);
+  });
+
+  it('_projectDropdownItems tells user to sign in if not logged in', () => {
+    element.userDisplayName = '';
+    element.loginUrl = 'http://login';
+
+    const items = element._projectDropdownItems;
+
+    // My Projects
+    assert.deepEqual(items[0], {
+      text: 'Sign in to see your projects',
+      url: 'http://login',
+    });
+  });
+
+  it('_projectDropdownItems computes projects for user', () => {
+    element.userProjects = {
+      ownerOf: ['chromium'],
+      memberOf: ['v8'],
+      contributorTo: ['skia'],
+      starredProjects: ['gerrit'],
+    };
+    element.userDisplayName = 'test@example.com';
+
+    const items = element._projectDropdownItems;
+
+    // TODO(http://crbug.com/monorail/6236): Replace these checks with
+    // deepInclude once we upgrade Chai.
+    // My Projects
+    assert.equal(items[1].text, 'chromium');
+    assert.equal(items[1].url, '/p/chromium/issues/list');
+    assert.equal(items[2].text, 'skia');
+    assert.equal(items[2].url, '/p/skia/issues/list');
+    assert.equal(items[3].text, 'v8');
+    assert.equal(items[3].url, '/p/v8/issues/list');
+
+    // Starred Projects
+    assert.equal(items[5].text, 'gerrit');
+    assert.equal(items[5].url, '/p/gerrit/issues/list');
+  });
+});