Jest prints "Duplicate module name: dummy" (jest-haste-map)

jest-haste-map: Haste module naming collision:
  Duplicate module name: dummy
  Paths: /builds/gitlab-org/gitlab-ce/vendor/ruby/2.5.0/gems/bootstrap_form-4.2.0/demo/package.json collides with /builds/gitlab-org/gitlab-ce/vendor/ruby/2.5.0/gems/graphql-1.8.1/spec/dummy/package.json

This warning is caused by `hasteImpl` returning the same name for different files.

(https://gitlab.com/gitlab-org/gitlab-ce/-/jobs/185999029)

I'm not sure if this has any implications for us.