Right now each my PR is tested twice: on python/typeshed@issue-branch and sobolevn/typeshed@issue-branch. Do we really want this?

In case we want to switch it off, it is as simple as:

on:
  workflow_dispatch:
  push:
    branches: [master]
  pull_request:
    branches: [master]

Here: https://github.com/python/typeshed/blob/master/.github/workflows/tests.yml#L5
I can send a PR if needed 🙂