diff --git a/.github/workflows/unit-test-os-versions.yml b/.github/workflows/unit-test-os-versions.yml
index 5f6573a1..fb61a778 100644
--- a/.github/workflows/unit-test-os-versions.yml
+++ b/.github/workflows/unit-test-os-versions.yml
@@ -23,7 +23,6 @@ jobs:
         uses: actions/setup-python@v1
         with:
           python-version: 3.11
-          architecture: x64
 
       - name: install sundials (ubuntu)
         if: ${{ matrix.os == 'ubuntu-latest' }}