diff --git a/tests/e2e/admin.spec.js b/tests/e2e/admin.spec.js
index 24971a7..f00c4d8 100644
--- a/tests/e2e/admin.spec.js
+++ b/tests/e2e/admin.spec.js
@@ -129,7 +129,67 @@ test.describe('Admin pages', () => {
   });
 
   // ---------------------------------------------------------------
-  // 8. Groups update
+  // 8. Profile validation
+  // ---------------------------------------------------------------
+  test.describe('Profile validation', () => {
+    test('invalid email shows error', async ({ page }) => {
+      await loginAsAdmin(page);
+      await page.goto(`/admin/users/${fixtures.admin_userid}`);
+
+      // Bypass HTML5 email validation so the form can submit
+      await page.locator('#email').evaluate(el => el.type = 'text');
+      await page.fill('#email', 'not-an-email');
+
+      await page.click('section:has(h2:has-text("Profile")) button[type="submit"]');
+
+      const alert = page.locator('#profile-status [role="alert"]');
+      await expect(alert).toBeVisible({ timeout: 5000 });
+      await expect(alert).toContainText('valid email address');
+    });
+
+    test('invalid phone number shows error', async ({ page }) => {
+      await loginAsAdmin(page);
+      await page.goto(`/admin/users/${fixtures.admin_userid}`);
+
+      // Bypass HTML5 pattern validation so the form can submit
+      await page.locator('#phone_number').evaluate(el => el.removeAttribute('pattern'));
+      await page.fill('#phone_number', 'not-a-phone');
+
+      await page.click('section:has(h2:has-text("Profile")) button[type="submit"]');
+
+      const alert = page.locator('#profile-status [role="alert"]');
+      await expect(alert).toBeVisible({ timeout: 5000 });
+      await expect(alert).toContainText('valid phone number');
+    });
+
+    test('invalid picture URL shows error', async ({ page }) => {
+      await loginAsAdmin(page);
+      await page.goto(`/admin/users/${fixtures.admin_userid}`);
+
+      // Bypass HTML5 URL validation so the form can submit
+      await page.locator('#picture').evaluate(el => el.type = 'text');
+      await page.fill('#picture', 'not-a-url');
+
+      await page.click('section:has(h2:has-text("Profile")) button[type="submit"]');
+
+      const alert = page.locator('#profile-status [role="alert"]');
+      await expect(alert).toBeVisible({ timeout: 5000 });
+      await expect(alert).toContainText('Picture URL');
+    });
+
+    test('phone input has E.164 hint attributes', async ({ page }) => {
+      await loginAsAdmin(page);
+      await page.goto(`/admin/users/${fixtures.admin_userid}`);
+
+      const phoneInput = page.locator('#phone_number');
+      await expect(phoneInput).toHaveAttribute('type', 'tel');
+      await expect(phoneInput).toHaveAttribute('pattern', '\\+[0-9 ]+');
+      await expect(phoneInput).toHaveAttribute('title', /International format/);
+    });
+  });
+
+  // ---------------------------------------------------------------
+  // 9. Groups update
   // ---------------------------------------------------------------
   test.describe('Groups update', () => {
     test('change groups and save', async ({ page }) => {
@@ -146,7 +206,7 @@ test.describe('Admin pages', () => {
   });
 
   // ---------------------------------------------------------------
-  // 9. Activate/deactivate toggle
+  // 10. Activate/deactivate toggle
   // ---------------------------------------------------------------
   test.describe('Activate/deactivate toggle', () => {
     test('deactivate then activate user', async ({ page }) => {
@@ -175,7 +235,7 @@ test.describe('Admin pages', () => {
   });
 
   // ---------------------------------------------------------------
-  // 10. Create invite from user list
+  // 11. Create invite from user list
   // ---------------------------------------------------------------
   test.describe('Create invite', () => {
     test('fill username and submit to get invite URL', async ({ page }) => {
@@ -193,7 +253,7 @@ test.describe('Admin pages', () => {
   });
 
   // ---------------------------------------------------------------
-  // 11. Re-invite from user detail
+  // 12. Re-invite from user detail
   // ---------------------------------------------------------------
   test.describe('Re-invite from user detail', () => {
     test('generate invite link from user detail page', async ({ page }) => {
@@ -210,7 +270,7 @@ test.describe('Admin pages', () => {
   });
 
   // ---------------------------------------------------------------
-  // 12. Delete user
+  // 13. Delete user
   // ---------------------------------------------------------------
   test.describe('Delete user', () => {
     test('delete a user and verify redirect to user list', async ({ page }) => {
diff --git a/tests/e2e/profile.spec.js b/tests/e2e/profile.spec.js
index 998d59d..6e0d49d 100644
--- a/tests/e2e/profile.spec.js
+++ b/tests/e2e/profile.spec.js
@@ -50,7 +50,7 @@ test.describe('Profile page', () => {
       await expect(page.locator('#family_name')).toHaveValue('Smith');
       await expect(page.locator('#preferred_username')).toHaveValue('asmith');
       await expect(page.locator('#email')).toHaveValue('alice@example.com');
-      await expect(page.locator('#phone_number')).toHaveValue('+1234567890');
+      await expect(page.locator('#phone_number')).toHaveValue('+12025551234');
       await expect(page.locator('#picture')).toHaveValue('https://example.com/alice.jpg');
       await expect(page.locator('#locale')).toHaveValue('en');
     });
@@ -168,7 +168,7 @@ test.describe('Profile page', () => {
 
       const alert = page.locator('#profile-status [role="alert"]');
       await expect(alert).toBeVisible({ timeout: 5000 });
-      await expect(alert).toContainText('Invalid email');
+      await expect(alert).toContainText('valid email address');
     });
 
     test('shows error for invalid picture URL', async ({ page }) => {
@@ -189,5 +189,34 @@ test.describe('Profile page', () => {
     test('picture input has type="url"', async ({ page }) => {
       await expect(page.locator('#picture')).toHaveAttribute('type', 'url');
     });
+
+    test('shows error for invalid phone number', async ({ page }) => {
+      // Bypass HTML5 validation by removing pattern attribute
+      await page.locator('#phone_number').evaluate(el => el.removeAttribute('pattern'));
+      await page.fill('#phone_number', 'not-a-phone');
+      await page.click('button[type="submit"]');
+
+      const alert = page.locator('#profile-status [role="alert"]');
+      await expect(alert).toBeVisible({ timeout: 5000 });
+      await expect(alert).toContainText('valid phone number');
+    });
+
+    test('normalizes phone number with spaces on save', async ({ page }) => {
+      await page.fill('#phone_number', '+46 70 123 45 67');
+      await page.click('button[type="submit"]');
+
+      const status = page.locator('#profile-status [role="status"]');
+      await expect(status).toBeVisible({ timeout: 5000 });
+      await expect(status).toContainText('Profile updated');
+
+      await page.reload();
+      await expect(page.locator('#phone_number')).toHaveValue('+46701234567');
+    });
+
+    test('phone input has correct E.164 hint attributes', async ({ page }) => {
+      await expect(page.locator('#phone_number')).toHaveAttribute('type', 'tel');
+      await expect(page.locator('#phone_number')).toHaveAttribute('pattern', '\\+[0-9 ]+');
+      await expect(page.locator('#phone_number')).toHaveAttribute('title', /International format/);
+    });
   });
 });
diff --git a/tests/e2e/setup_db.py b/tests/e2e/setup_db.py
index bce3821..bb43e8e 100644
--- a/tests/e2e/setup_db.py
+++ b/tests/e2e/setup_db.py
@@ -87,7 +87,7 @@ async def seed() -> None:
         family_name="Smith",
         preferred_username="asmith",
         email="alice@example.com",
-        phone_number="+1234567890",
+        phone_number="+12025551234",
         picture="https://example.com/alice.jpg",
         locale="en",
         groups=["users"],