diff --git a/packages/trace-viewer/src/ui/tag.css b/packages/trace-viewer/src/ui/tag.css
new file mode 100644
index 0000000000..7cbc57b91d
--- /dev/null
+++ b/packages/trace-viewer/src/ui/tag.css
@@ -0,0 +1,92 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+.label {
+  display: inline-block;
+  padding: 0 8px;
+  font-size: 12px;
+  font-weight: 500;
+  line-height: 18px;
+  border: 1px solid transparent;
+  border-radius: 2em;
+  background-color: #8c959f;
+  color: white;
+  margin: 0 10px;
+  flex: none;
+  font-weight: 600;
+}
+
+.light-mode .label-color-0 {
+  background-color: #ddf4ff;
+  color: #0550ae;
+  border: 1px solid #218bff;
+}
+.light-mode .label-color-1 {
+  background-color: #fff8c5;
+  color: #7d4e00;
+  border: 1px solid #bf8700;
+}
+.light-mode .label-color-2 {
+  background-color: #fbefff;
+  color: #6e40c9;
+  border: 1px solid #a475f9;
+}
+.light-mode .label-color-3 {
+  background-color: #ffeff7;
+  color: #99286e;
+  border: 1px solid #e85aad;
+}
+.light-mode .label-color-4 {
+  background-color: #FFF0EB;
+  color: #9E2F1C;
+  border: 1px solid #EA6045;
+}
+.light-mode .label-color-5 {
+  background-color: #fff1e5;
+  color: #9b4215;
+  border: 1px solid #e16f24;
+}
+
+.dark-mode .label-color-0 {
+  background-color: #051d4d;
+  color: #80ccff;
+  border: 1px solid #218bff;
+}
+.dark-mode .label-color-1 {
+  background-color: #3b2300;
+  color: #eac54f;
+  border: 1px solid #bf8700;
+}
+.dark-mode .label-color-2 {
+  background-color: #271052;
+  color: #d2a8ff;
+  border: 1px solid #a475f9;
+}
+.dark-mode .label-color-3 {
+  background-color: #42062a;
+  color: #ff9bce;
+  border: 1px solid #e85aad;
+}
+.dark-mode .label-color-4 {
+  background-color: #460701;
+  color: #FFA28B;
+  border: 1px solid #EC6547;
+}
+.dark-mode .label-color-5 {
+  background-color: #471700;
+  color: #ffa657;
+  border: 1px solid #e16f24;
+}
\ No newline at end of file
diff --git a/packages/html-reporter/src/labelUtils.tsx b/packages/trace-viewer/src/ui/tag.tsx
similarity index 66%
rename from packages/html-reporter/src/labelUtils.tsx
rename to packages/trace-viewer/src/ui/tag.tsx
index 014ec77d59..ede316e76c 100644
--- a/packages/html-reporter/src/labelUtils.tsx
+++ b/packages/trace-viewer/src/ui/tag.tsx
@@ -14,10 +14,24 @@
  * limitations under the License.
  */
 
+import './tag.css';
+
+const Tag: React.FC<{ color: number, children: string, style?: React.CSSProperties, onClick?: (e: React.MouseEvent) => void }> = ({ color, children, style, onClick }) => {
+  return <span
+    className={`label label-color-${color}`}
+    onClick={onClick}
+    style={{ margin: '6px 0 0 6px', ...style }}
+  >
+    {children}
+  </span>;
+};
+
 // hash string to integer in range [0, 6] for color index, to get same color for same tag
-export function hashStringToInt(str: string) {
+export function tagNametoColor(str: string) {
   let hash = 0;
   for (let i = 0; i < str.length; i++)
     hash = str.charCodeAt(i) + ((hash << 8) - hash);
   return Math.abs(hash % 6);
 }
+
+export default Tag;
\ No newline at end of file
diff --git a/packages/trace-viewer/src/ui/uiModeTestListView.tsx b/packages/trace-viewer/src/ui/uiModeTestListView.tsx
index 7ca7f95bdc..7d7df8bfed 100644
--- a/packages/trace-viewer/src/ui/uiModeTestListView.tsx
+++ b/packages/trace-viewer/src/ui/uiModeTestListView.tsx
@@ -30,6 +30,7 @@ import { testStatusIcon } from './testUtils';
 import type { TestModel } from './uiModeModel';
 import './uiModeTestListView.css';
 import type { TestServerConnection } from '@testIsomorphic/testServerConnection';
+import Tag, { tagNametoColor } from './tag';
 
 const TestTreeView = TreeView<TreeItem>;
 
@@ -46,7 +47,8 @@ export const TestListView: React.FC<{
   isLoading?: boolean,
   onItemSelected: (item: { treeItem?: TreeItem, testCase?: reporterTypes.TestCase, testFile?: SourceLocation }) => void,
   requestedCollapseAllCount: number,
-}> = ({ filterText, testModel, testServerConnection, testTree, runTests, runningState, watchAll, watchedTreeIds, setWatchedTreeIds, isLoading, onItemSelected, requestedCollapseAllCount }) => {
+  setFilterText: (text: string) => void;
+}> = ({ filterText, testModel, testServerConnection, testTree, runTests, runningState, watchAll, watchedTreeIds, setWatchedTreeIds, isLoading, onItemSelected, requestedCollapseAllCount, setFilterText }) => {
   const [treeState, setTreeState] = React.useState<TreeState>({ expandedItems: new Map() });
   const [selectedTreeItemId, setSelectedTreeItemId] = React.useState<string | undefined>();
   const [collapseAllCount, setCollapseAllCount] = React.useState(requestedCollapseAllCount);
@@ -140,7 +142,10 @@ export const TestListView: React.FC<{
     dataTestId='test-tree'
     render={treeItem => {
       return <div className='hbox ui-mode-list-item'>
-        <div className='ui-mode-list-item-title' title={treeItem.title}>{treeItem.title}</div>
+        <div className='ui-mode-list-item-title' title={treeItem.title}>
+          {treeItem.title}
+          {treeItem.kind === 'case' ? treeItem.tags.map(tag => <Tag key={tag} color={tagNametoColor(tag)} onClick={e => {e.preventDefault(); setFilterText(tag);}}>{tag.slice(1)}</Tag>) : null}
+        </div>
         {!!treeItem.duration && treeItem.status !== 'skipped' && <div className='ui-mode-list-item-time'>{msToString(treeItem.duration)}</div>}
         <Toolbar noMinHeight={true} noShadow={true}>
           <ToolbarButton icon='play' title='Run' onClick={() => runTreeItem(treeItem)} disabled={!!runningState}></ToolbarButton>
diff --git a/packages/trace-viewer/src/ui/uiModeView.tsx b/packages/trace-viewer/src/ui/uiModeView.tsx
index 2cc76ff8fd..c9bb76f578 100644
--- a/packages/trace-viewer/src/ui/uiModeView.tsx
+++ b/packages/trace-viewer/src/ui/uiModeView.tsx
@@ -64,6 +64,7 @@ const queryParams = {
 };
 
 const isMac = navigator.platform === 'MacIntel';
+const isUnderTest = searchParams.get('isUnderTest') === 'true';
 
 export const UIModeView: React.FC<{}> = ({
 }) => {
@@ -376,7 +377,7 @@ export const UIModeView: React.FC<{}> = ({
       <div className='title'>UI Mode disconnected</div>
       <div><a href='#' onClick={() => window.location.href = '/'}>Reload the page</a> to reconnect</div>
     </div>}
-    <SplitView sidebarSize={250} minSidebarSize={150} orientation='horizontal' sidebarIsFirst={true} settingName='testListSidebar'>
+    <SplitView sidebarSize={isUnderTest ? 350 : 250} minSidebarSize={150} orientation='horizontal' sidebarIsFirst={true} settingName='testListSidebar'>
       <div className='vbox'>
         <div className={'vbox' + (isShowingOutput ? '' : ' hidden')}>
           <Toolbar>
@@ -439,7 +440,9 @@ export const UIModeView: React.FC<{}> = ({
           watchedTreeIds={watchedTreeIds}
           setWatchedTreeIds={setWatchedTreeIds}
           isLoading={isLoading}
-          requestedCollapseAllCount={collapseAllCount} />
+          requestedCollapseAllCount={collapseAllCount}
+          setFilterText={setFilterText}
+        />
       </div>
     </SplitView>
   </div>;
diff --git a/tests/playwright-test/ui-mode-fixtures.ts b/tests/playwright-test/ui-mode-fixtures.ts
index a8c2ede79b..fa1ee5c023 100644
--- a/tests/playwright-test/ui-mode-fixtures.ts
+++ b/tests/playwright-test/ui-mode-fixtures.ts
@@ -75,7 +75,7 @@ export function dumpTestTree(page: Page, options: { time?: boolean } = {}): () =
       const indent = listItem.querySelectorAll('.list-view-indent').length;
       const watch = listItem.querySelector('.toolbar-button.eye.toggled') ? ' 👁' : '';
       const selected = listItem.classList.contains('selected') ? ' <=' : '';
-      const title = listItem.querySelector('.ui-mode-list-item-title').textContent;
+      const title = listItem.querySelector('.ui-mode-list-item-title').childNodes[0].textContent;
       const timeElement = options.time ? listItem.querySelector('.ui-mode-list-item-time') : undefined;
       const time = timeElement ? ' ' + timeElement.textContent.replace(/[.\d]+m?s/, 'XXms') : '';
       result.push('    ' + '  '.repeat(indent) + treeIcon + ' ' + statusIcon + ' ' + title + time + watch + selected);
diff --git a/tests/playwright-test/ui-mode-test-filters.spec.ts b/tests/playwright-test/ui-mode-test-filters.spec.ts
index f35d4dec4a..8469db3990 100644
--- a/tests/playwright-test/ui-mode-test-filters.spec.ts
+++ b/tests/playwright-test/ui-mode-test-filters.spec.ts
@@ -56,6 +56,22 @@ test('should filter by explicit tags', async ({ runUITest }) => {
   `);
 });
 
+test('should display native tags and filter by them on click', async ({ runUITest }) => {
+  const { page } = await runUITest({
+    'a.test.ts': `
+      import { test, expect } from '@playwright/test';
+      test('passes', () => {});
+      test('passes with tags', { tag: '@smoke' }, () => {});
+  `,
+  });
+  await page.locator('.ui-mode-list-item-title').getByText('smoke').click();
+  await expect(page.getByPlaceholder('Filter')).toHaveValue('@smoke');
+  await expect.poll(dumpTestTree(page)).toBe(`
+    ▼ ◯ a.test.ts
+        ◯ passes with tags <=
+  `);
+});
+
 test('should filter by status', async ({ runUITest }) => {
   const { page } = await runUITest(basicTestTree);