InvalidDistribution: Unknown distribution format: 'artifact' when not specifying an artifact name

[danielniccoli]

An error InvalidDistribution: Unknown distribution format: 'artifact' is thrown when artifact upload/download is used with the default name.

jobs:
  build:
    - name: Store the distribution packages
      uses: actions/upload-artifact@v3
      with:
        # name: python-package-distributions
        path: dist/

  publish-to-testpypi:
    steps:
    - name: Download all the dists
      uses: actions/download-artifact@v3
      with:
        # name: python-package-distributions
        path: dist/
    - name: Publish distribution 📦 to TestPyPI
      uses: pypa/gh-action-pypi-publish@release/v1
      with:
        repository-url: https://test.pypi.org/legacy/

Warning:  It looks like there are no Python distribution packages to publish in the directory 'dist/'. Please verify that they are in place should you face this problem.
Checking dist/artifact: ERROR    InvalidDistribution: Unknown distribution format: 'artifact'