diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 5d948a837..3e3b494ed 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -15,6 +15,7 @@ jobs:
         with:
           auto-update-conda: true
           python-version: ${{ matrix.python-version }}
+          channels: conda-forge
       - uses: actions/checkout@v3
       - run: git fetch --prune --unshallow --tags