[Bug]: tranformIgnorePatterns not working after 30.0.0

[janpe]

Version

30.2.0

Steps to reproduce

1. clone repo https://github.com/janpe/jest-30-transform-ignore-patterns
2. run yarn
3. run yarn test
4. tests fail
5. change jest in package.json to ^29.0.0
6. test succeed

Expected behavior

Expected transformIgnorePatterns to work as before

Actual behavior

Getting error SyntaxError: Cannot use import statement outside a module

Additional context

No response

Environment

System:
    OS: macOS 26.1
    CPU: (12) arm64 Apple M3 Pro
  Binaries:
    Node: 22.18.0 - /Users/[...]/.nvm/versions/node/v22.18.0/bin/node
    Yarn: 4.12.0 - /Users/[...]/.nvm/versions/node/v22.18.0/bin/yarn
    npm: 10.9.3 - /Users/[...]/.nvm/versions/node/v22.18.0/bin/npm
  npmPackages:
    jest: ^30.0.0 => 30.2.0

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 30 days.

[janpe]

still relevant

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 30 days.

[janpe]

still an issue

[inconceeeivable]

Also having this problem in the context of testing DOMPurify related code in a NodeJS environment with Jest 30.x. It was working in 29.x

[janpe]

For me the problem was this one and the workaround described here.

I'll be closing this one but #15728 is a related one that's still open.

[github-actions]

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