diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index a8d91b0..d366fc4 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -23,7 +23,9 @@ jobs:
       - uses: conda-incubator/setup-miniconda@v2
         with:
           # mamba-version: "*" # activate this to build with mamba.
-          # channels: conda-forge, defaults # These need to be specified to use mamba
+          python-version: ${{ matrix.python-version }}
+          miniforge-variant: Mambaforge
+          channels: conda-forge, defaults # These need to be specified to use mamba
           channel-priority: true
           environment-file: ci/environment-py${{ matrix.python-version }}.yml