[Bug]: Playwright 1.58.0 collects *.esm.preflight files as tests, causing duplicate test title errors

[Abhinegi2]

Version

1.58.0

After upgrading @playwright/test from 1.57.0 to 1.58.0 in a TypeScript ESM project that uses import "tsx/esm" in playwright.config.ts, Playwright reports duplicate test titles. The duplicates reference files named *.esm.preflight (e.g. sometest-tests.spec.ts.esm.preflight) even though those files are not part of our repo.

Downgrading to 1.57.0 resolves the issue.

Steps to reproduce

1. Use Node 20+ with "type": "module" in package.json.
2. In playwright.config.ts, import tsx/esm:

   import "tsx/esm";

Here you can see the actual error -https://github.com/Aam-Digital/ndb-core/actions/runs/21467121434/job/61831518943?pr=3626

Expected behavior

Playwright should only execute the real *.spec.ts files and not collect any *.esm.preflight artifacts.

Actual behavior

Playwright errors with duplicate test title messages:
Error: duplicate test title "Edit existing Name field to set and reset default value", first declared in admin-tests.spec.ts.esm.preflight:3

Additional context

Regression:

• 1.57.0: no duplicate title errors
• 1.58.0: duplicate title errors referencing *.esm.preflight

Environment

OS: macOS (arm64)
@playwright/test: 1.58.0
tsx: 4.21.0
type: "module" in package.json

[pavelfeldman]

Could you follow this https://github.com/microsoft/playwright/blob/main/FILING_ISSUES.md so that we could fix and test it?