Browser mode: Random 'Vitest failed to find the current suite' error in CI

Describe the bug

Visual tests using @vitest/browser with Playwright randomly fail in CI with the error:

Error: Failed to import test file [path]
Caused by: Error: Vitest failed to find the current suite. This is a bug in Vitest. Please, open an issue with reproduction.

Reproduction

This happens randomly in CI (GitHub Actions) and is not reproducible locally. The same tests pass when re-running CI.

Affected test files pattern: *.visual-test.tsx

Example failing test:

import { render } from "@testing-library/react";
import { expect, test } from "vitest";

test("default empty - desktop", async () => {
  render(<MyComponent />);
  await expect(document.body).toMatchScreenshot();
});

System Info

Vitest: 4.0.8
@vitest/browser: 4.0.8
@vitest/browser-playwright: 4.0.8
Playwright: latest
OS: Ubuntu (GitHub Actions runner)
Node: 20.x

Behavior

• ✅ Tests pass locally (macOS)
• ❌ Tests randomly fail in CI (GitHub Actions, Ubuntu)
• ✅ Re-running CI usually fixes the issue
• The error occurs at test file import, not during test execution

Frequency

Intermittent - approximately 1 in 5 CI runs fail with this error.

Used Package Manager

pnpm

Validations

• Check that there isn't already an issue that reports the same bug
• The provided reproduction is minimal and clean

Start by running the affected *.visual-test.tsx files with @vitest/browser and Playwright in the GitHub Actions Ubuntu environment, comparing failures with successful reruns. Investigate the import-time "current suite" failure and verify any change against the provided example and intermittent CI behavior; done means the suite no longer fails during test-file import.