diff --git a/.github/workflows/pythontests.yml b/.github/workflows/pythontests.yml
index e321827..82db61f 100644
--- a/.github/workflows/pythontests.yml
+++ b/.github/workflows/pythontests.yml
@@ -45,7 +45,7 @@ jobs:
     - name: Run tests
       run: |
         TOX_PYTHON_VERSION=$(if [[ ${{ matrix.python-version }} == pypy* ]]; then echo ${{ matrix.python-version }} | tr -d .-; else echo py${{ matrix.python-version }} | tr -d .-; fi)
-        COV_CMD=$(if [ ${{ matrix.python-version }} == 3.13 ]; then echo "--cov=./pytest_order/ --cov-report=xml"; else echo ; fi) tox -e $(tox -l | grep "$TOX_PYTHON_VERSION" | paste -sd "," -)
+        COV_CMD=$(if [ ${{ matrix.python-version }} == 3.13 ]; then echo "--cov=./pytest_order/ --cov-report=xml"; else echo ; fi) tox -e $(tox -l | grep -E "^${TOX_PYTHON_VERSION}-" | paste -sd "," -)
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v7
       if: ${{ success() && matrix.python-version == 3.13 }}