diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index c4d4df57..2dd0c877 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -24,9 +24,12 @@ jobs:
     uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@d68193b68216da64eafaa618f53c59f5d271c56e  # v1.14.0
     if: github.repository == 'astropy/astroplan'
     with:
+      submodules: false
       # We upload to PyPI for all tags starting with v but not ones ending in .dev
       upload_to_pypi: ${{ startsWith(github.ref, 'refs/tags/v') && !endsWith(github.ref, '.dev') && (github.event_name == 'push') }}
       test_extras: test
       test_command: pytest -p no:warnings --astropy-header --pyargs astroplan
+      env: |
+        PY_IGNORE_IMPORTMISMATCH: 1
     secrets:
       pypi_token: ${{ secrets.PYPI_TOKEN }}