# Self-signed certificates

By default Playwright validates TLS certificates like a real browser, so a target using a self-signed or internally-issued certificate makes every `page.goto(...)` fail with `net::ERR_CERT_AUTHORITY_INVALID` before the test logic even runs.

There is no plugin-level toggle for this — it is set explicitly in the transaction with Playwright's own `test.use()`:

```typescript
import { test, expect } from '@playwright/test';

test.use({ ignoreHTTPSErrors: true });

test('checkout flow', async ({ page }) => {
  await page.goto('https://internal.example.com');
  // ...
});
```

- `test.use({ ignoreHTTPSErrors: true })` at the top level of the file applies to every `test(...)` below it.
- To scope it to only some tests in the same file, wrap them in their own `test.describe(...)` block and call `test.use({ ignoreHTTPSErrors: true })` as the first line inside that block instead of at the top level.
- This only disables **certificate validation**, not TLS itself — the connection stays encrypted, it just no longer requires a trusted CA chain.