diff --git a/.github/workflows/test_all_pyv.yaml b/.github/workflows/test_all_pyv.yaml
index 9302a6d..1de8999 100644
--- a/.github/workflows/test_all_pyv.yaml
+++ b/.github/workflows/test_all_pyv.yaml
@@ -32,7 +32,7 @@ jobs:
       - name: Setup Mamba
         uses: conda-incubator/setup-miniconda@v3
         with:
-          python-version: matrix.python-version
+          python-version: ${{ matrix.python-version }}
           miniforge-variant: Mambaforge
           miniforge-version: latest
           activate-environment: MPP