diff --git a/.github/workflows/release-python.yml b/.github/workflows/release-python.yml
index fe831c14a4..1dbd7ff43a 100644
--- a/.github/workflows/release-python.yml
+++ b/.github/workflows/release-python.yml
@@ -79,12 +79,6 @@ jobs:
         with:
           name: all-dist-${{ github.run_id }}
           path: dist/
-      - name: Publish package distributions to TestPyPI
-        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # release/v1
-        with:
-          repository-url: https://test.pypi.org/legacy/
-          skip-existing: true
-          attestations: ${{ env.DRY_RUN }}
       - name: Publish package distributions to PyPI
         if: startsWith(env.DRY_RUN, 'false')
         uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # release/v1
diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index 30a8aa3713..d4fba2f731 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -53,6 +53,13 @@ jobs:
       - name: Run synchro smoke test
         run: |
           uv run --extra test --with unasync pytest tools/test_synchro.py -v --override-ini="addopts="
+      - name: Validate pyproject.toml
+        run: |
+          uvx --from 'validate-pyproject[all]' validate-pyproject pyproject.toml
+      - name: Check package metadata
+        run: |
+          uv build
+          uvx twine check --strict dist/*
       - run: |
           sudo apt-get install -y cppcheck
       - run: |