diff --git a/.github/workflows/pythonbuild.yml b/.github/workflows/pythonbuild.yml
index fe04a3c60d..7cab03aa8d 100644
--- a/.github/workflows/pythonbuild.yml
+++ b/.github/workflows/pythonbuild.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         include:
-          #- tox-env: py37-core
+          - tox-env: py37-core
           - tox-env: py38-core
           - tox-env: py39-core
           - tox-env: py310-core
@@ -27,6 +27,11 @@ jobs:
         with:
           enable-cache: true
           cache-dependency-glob: "pyproject.toml"
+      - name: Set up Python ${{ matrix.python-version }}
+        if: ${{ matrix.tox-env == 'py37-core' }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
       - name: Install dependencies
         run: |
           uv tool install --python-preference only-managed --python 3.12 tox --with tox-uv # we need latest uv, tox, and tox-uv
@@ -37,9 +42,15 @@ jobs:
           mysql -e 'create user 'travis'@'localhost';' -uroot -proot || true
           mysql -e 'grant all privileges ON *.* TO 'travis'@'localhost';' -uroot -proot || true
       - name: Build
+        if: ${{ matrix.tox-env != 'py37-core' }}
         env:
           TOXENV: ${{ matrix.tox-env }}
         run: uvx --with tox-uv tox run
+      - name: Build
+        if: ${{ matrix.tox-env == 'py37-core' }}
+        env:
+          TOXENV: ${{ matrix.tox-env }}
+        run: uvx --python-preference only-system tox run
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5
         with: