diff --git a/apps/pwa/e2e/timezone-verify.spec.ts b/apps/pwa/e2e/timezone-verify.spec.ts
index 31e2df2..8fca3be 100644
--- a/apps/pwa/e2e/timezone-verify.spec.ts
+++ b/apps/pwa/e2e/timezone-verify.spec.ts
@@ -12,7 +12,12 @@
 import { test, expect } from '@playwright/test';
 
 test.describe('Admin Timezone section — 18-04 round-trip', () => {
-  test.beforeEach(async ({ page }) => {
+  test.beforeEach(async ({ page }, testInfo) => {
+    // Desktop-only: the admin timezone UI is desktop-focused, and these tests mutate
+    // the single household_timezone row. global-setup resets that row once per run, so
+    // running on multiple profiles lets one project's save leak into another project's
+    // first-run assertions. Restricting to one project keeps the shared state coherent.
+    test.skip(testInfo.project.name !== 'desktop', 'Admin timezone UI is desktop-only');
     await page.goto('/admin');
     await expect(page.getByRole('heading', { name: 'Admin Settings' })).toBeVisible();
     // Wait for the Timezone section to load (requires the 18-02 GET endpoint)