diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index d2b3d169a..c0d520429 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -24,7 +24,7 @@ jobs:
           - { name: linux-python3.12-upgraded    , test-tox-env: py312-upgraded  , build-tox-env: build-py312-upgraded , python-ver: "3.12", os: ubuntu-latest , upload-wheels: true }
           - { name: windows-python3.8-minimum    , test-tox-env: py38-minimum    , build-tox-env: build-py38-minimum   , python-ver: "3.8" , os: windows-latest }
           - { name: windows-python3.12-upgraded  , test-tox-env: py312-upgraded  , build-tox-env: build-py312-upgraded , python-ver: "3.12", os: windows-latest }
-          - { name: macos-python3.8-minimum      , test-tox-env: py38-minimum    , build-tox-env: build-py38-minimum   , python-ver: "3.8" , os: macos-latest }
+          - { name: macos-python3.8-minimum      , test-tox-env: py38-minimum    , build-tox-env: build-py38-minimum   , python-ver: "3.8" , os: macos-13 }
     steps:
       - name: Cancel non-latest runs
         uses: styfle/cancel-workflow-action@0.11.0