Question brief

When not to use Cypress (2026 failure modes)

Cypress publishes its own trade-offs reference. The 2026 failure-mode list is: cross-origin navigation in one test, multi-tab tests, native dialogs and file pickers, and mobile native. Each has a clear alternative.

Direct answer

Our take: none of these failure modes are bugs; they are deliberate architectural choices that produce the developer experience Cypress is known for. The question is whether your product surface area triggers them.

Section 1

Cross-origin navigation in one test

Cypress runs inside the application's browser context, which limits cross-origin navigation in a single test. The 2024 cy.origin command improved this but it remains a constraint. Playwright handles cross-origin natively.

Section 2

Multiple browser tabs in one test

Cypress does not support testing flows that open multiple tabs in a single test. If your product has share-to-Slack-and-back flows, this matters. Playwright handles multi-tab natively.

Section 3

Native dialogs and file pickers

Cypress cannot interact with native browser dialogs (alert / confirm / prompt are stubbed; native file pickers and downloads need workarounds). Playwright handles these as first-class APIs.

Section 4

Mobile native

Cypress is browser-only. Mobile native testing needs Appium or a hosted device cloud. This is not a Cypress failure mode so much as a category boundary.