diff --git a/.github/workflows/testpypi-release.yaml b/.github/workflows/testpypi-release.yaml
new file mode 100644
index 0000000..df382cf
--- /dev/null
+++ b/.github/workflows/testpypi-release.yaml
@@ -0,0 +1,88 @@
+name: Build and Upload to TestPyPI
+
+on:
+  push:
+    branches:
+      - "main"
+  pull_request:
+    types: [opened, reopened, synchronize, labeled]
+    branches:
+      - "*"
+  workflow_dispatch:
+
+# no need for concurrency limits
+
+jobs:
+  build-artifacts:
+    if: ${{ contains( github.event.pull_request.labels.*.name, 'test-build') && github.event_name == 'pull_request' || github.event_name == 'workflow_dispatch' }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-python@v4
+        name: Install Python
+        with:
+          python-version: "3.10"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install build twine
+          python -m pip install tomli tomli_w
+
+      # - name: Disable local versions
+      #   run: |
+      #     python .github/workflows/configure-testpypi-version.py pyproject.toml
+      #     git update-index --assume-unchanged pyproject.toml
+      #     cat pyproject.toml
+
+      - name: Build tarball and wheels
+        run: |
+          git clean -xdf
+          python -m build
+
+      - name: Check built artifacts
+        run: |
+          python -m twine check --strict dist/*
+          if [ -f dist/py-cordex-0.0.0.tar.gz ]; then
+            echo "❌ INVALID VERSION NUMBER"
+            exit 1
+          else
+            echo "✅ Looks good"
+          fi
+
+      - uses: actions/upload-artifact@v3
+        with:
+          name: releases
+          path: dist
+
+  test-built-dist:
+    needs: build-artifacts
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-python@v4
+        name: Install Python
+        with:
+          python-version: "3.10"
+      - uses: actions/download-artifact@v3
+        with:
+          name: releases
+          path: dist
+      - name: List contents of built dist
+        run: |
+          ls -ltrh
+          ls -ltrh dist
+
+      - name: Verify the built dist/wheel is valid
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install dist/py-cordex*.whl
+
+      # - name: Publish package to TestPyPI
+      #   uses: pypa/gh-action-pypi-publish@v1.6.4
+      #   with:
+      #     password: ${{ secrets.TESTPYPI_TOKEN }}
+      #     repository_url: https://test.pypi.org/legacy/
+      #     verbose: true