diff --git a/e2e/helpers/auth.ts b/e2e/helpers/auth.ts
index 8b3d0762b..ea267acce 100644
--- a/e2e/helpers/auth.ts
+++ b/e2e/helpers/auth.ts
@@ -15,11 +15,16 @@ export async function loginAsAdmin(page: Page): Promise<void> {
   await loginAs(page, 'admin');
 }
 
-/** Logs in as a general (non-admin) user and waits for redirect to home. */
+/** Logs in as a general (non-admin) user verified with a fictional AtCoder handle. */
 export async function loginAsUser(page: Page): Promise<void> {
   await loginAs(page, 'guest');
 }
 
+/** Logs in as a general user without AtCoder verification and waits for redirect to home. */
+export async function loginAsUnverifiedUser(page: Page): Promise<void> {
+  await loginAs(page, 'Alice');
+}
+
 /**
  * Fills and submits the login form without navigating first.
  * Use when already on /login?redirectTo=... to preserve the redirect destination.
diff --git a/e2e/user_edit.spec.ts b/e2e/user_edit.spec.ts
index 39bca448b..f2f7510e3 100644
--- a/e2e/user_edit.spec.ts
+++ b/e2e/user_edit.spec.ts
@@ -1,5 +1,5 @@
-import { test, expect } from '@playwright/test';
-import { loginAsUser } from './helpers/auth';
+import { test, expect, type Page } from '@playwright/test';
+import { loginAsUnverifiedUser, loginAsUser } from './helpers/auth';
 
 const TIMEOUT = 60 * 1000;
 const SHORT_TIMEOUT = 5000;
@@ -7,31 +7,59 @@ const SHORT_TIMEOUT = 5000;
 // Mirrors /users/edit route
 const EDIT_PAGE_URL = '/users/edit';
 
+const BASIC_INFO_TAB_NAME = '基本情報';
+const ATCODER_TAB_NAME = 'AtCoder IDを設定';
+
+function getTab(page: Page, name: string) {
+  return page.getByRole('tab', { name });
+}
+
+async function openEditPage(page: Page): Promise<void> {
+  await page.goto(EDIT_PAGE_URL);
+  // Wait for page to stabilize before running assertions
+  await expect(getTab(page, BASIC_INFO_TAB_NAME)).toBeVisible({ timeout: TIMEOUT });
+}
+
 test.describe('user edit page (/users/edit)', () => {
   test('unauthenticated user is redirected to /login', async ({ page }) => {
     await page.goto(EDIT_PAGE_URL);
     await expect(page).toHaveURL(/\/login/, { timeout: TIMEOUT });
   });
 
-  test.describe('logged-in user (guest)', () => {
+  test.describe('logged-in user without AtCoder verification (Alice)', () => {
     test.beforeEach(async ({ page }) => {
-      await loginAsUser(page);
-      await page.goto(EDIT_PAGE_URL);
-      // Wait for page to stabilize before running assertions
-      await expect(page.getByRole('tab', { name: '基本情報' })).toBeVisible({ timeout: TIMEOUT });
+      await loginAsUnverifiedUser(page);
+      await openEditPage(page);
     });
 
     test('基本情報 tab is active by default', async ({ page }) => {
-      // Tab visibility already asserted in beforeEach; check active state only
-      await expect(page.getByRole('tab', { name: '基本情報' })).toHaveAttribute(
-        'aria-selected',
-        'true',
-        { timeout: SHORT_TIMEOUT },
-      );
+      await expect(getTab(page, BASIC_INFO_TAB_NAME)).toHaveAttribute('aria-selected', 'true', {
+        timeout: SHORT_TIMEOUT,
+      });
+      await expect(getTab(page, ATCODER_TAB_NAME)).toHaveAttribute('aria-selected', 'false');
+    });
+  });
+
+  test.describe('logged-in user with AtCoder verification (guest)', () => {
+    test.beforeEach(async ({ page }) => {
+      await loginAsUser(page);
+      await openEditPage(page);
     });
 
-    test('username is displayed in the 基本情報 tab', async ({ page }) => {
-      // Assert the username label input shows the logged-in user's name
+    test('AtCoder IDを設定 tab is active by default', async ({ page }) => {
+      await expect(getTab(page, ATCODER_TAB_NAME)).toHaveAttribute('aria-selected', 'true', {
+        timeout: SHORT_TIMEOUT,
+      });
+      await expect(getTab(page, BASIC_INFO_TAB_NAME)).toHaveAttribute('aria-selected', 'false');
+    });
+
+    test('username is displayed after opening the 基本情報 tab', async ({ page }) => {
+      // The AtCoder tab also renders a ユーザ名 field, so confirm the 基本情報 tab is selected first
+      await getTab(page, BASIC_INFO_TAB_NAME).click();
+      await expect(getTab(page, BASIC_INFO_TAB_NAME)).toHaveAttribute('aria-selected', 'true', {
+        timeout: SHORT_TIMEOUT,
+      });
+
       await expect(page.getByRole('textbox', { name: 'ユーザ名' })).toHaveValue('guest', {
         timeout: SHORT_TIMEOUT,
       });
@@ -39,7 +67,7 @@ test.describe('user edit page (/users/edit)', () => {
 
     test('アカウント削除 tab is not shown for the guest user', async ({ page }) => {
       // guest is excluded from account deletion (isGeneralUser returns false for username 'guest')
-      await expect(page.getByRole('tab', { name: 'アカウント削除' })).not.toBeVisible({
+      await expect(getTab(page, 'アカウント削除')).not.toBeVisible({
         timeout: SHORT_TIMEOUT,
       });
     });