diff --git a/.github/workflows/run_all_tests.yml b/.github/workflows/run_all_tests.yml
index d5f8afc7f..67a645037 100644
--- a/.github/workflows/run_all_tests.yml
+++ b/.github/workflows/run_all_tests.yml
@@ -41,8 +41,8 @@ jobs:
           - { name: windows-python3.12            , test-tox-env: pytest-py312-pinned          , python-ver: "3.12", os: windows-latest }
           - { name: windows-python3.12-upgraded   , test-tox-env: pytest-py312-upgraded        , python-ver: "3.12", os: windows-latest }
           - { name: windows-python3.12-prerelease , test-tox-env: pytest-py312-prerelease      , python-ver: "3.12", os: windows-latest }
-          - { name: macos-python3.8-minimum       , test-tox-env: pytest-py38-minimum          , python-ver: "3.8" , os: macos-latest }
-          - { name: macos-python3.9               , test-tox-env: pytest-py39-pinned           , python-ver: "3.9" , os: macos-latest }
+          - { name: macos-python3.8-minimum       , test-tox-env: pytest-py38-minimum          , python-ver: "3.8" , os: macos-13 }
+          - { name: macos-python3.9               , test-tox-env: pytest-py39-pinned           , python-ver: "3.9" , os: macos-13 }
           - { name: macos-python3.10              , test-tox-env: pytest-py310-pinned          , python-ver: "3.10", os: macos-latest }
           - { name: macos-python3.11              , test-tox-env: pytest-py311-pinned          , python-ver: "3.11", os: macos-latest }
           - { name: macos-python3.11-optional     , test-tox-env: pytest-py311-optional-pinned , python-ver: "3.11", os: macos-latest }
@@ -105,7 +105,7 @@ jobs:
           - { name: windows-gallery-python3.11-optional  , test-tox-env: gallery-py311-optional-pinned , python-ver: "3.11", os: windows-latest }
           - { name: windows-gallery-python3.12-upgraded  , test-tox-env: gallery-py312-upgraded        , python-ver: "3.12", os: windows-latest }
           - { name: windows-gallery-python3.12-prerelease, test-tox-env: gallery-py312-prerelease      , python-ver: "3.12", os: windows-latest }
-          - { name: macos-gallery-python3.8-minimum      , test-tox-env: gallery-py38-minimum          , python-ver: "3.8" , os: macos-latest }
+          - { name: macos-gallery-python3.8-minimum      , test-tox-env: gallery-py38-minimum          , python-ver: "3.8" , os: macos-13 }
           - { name: macos-gallery-python3.11-optional    , test-tox-env: gallery-py311-optional-pinned , python-ver: "3.11", os: macos-latest }
           - { name: macos-gallery-python3.12-upgraded    , test-tox-env: gallery-py312-upgraded        , python-ver: "3.12", os: macos-latest }
           - { name: macos-gallery-python3.12-prerelease  , test-tox-env: gallery-py312-prerelease      , python-ver: "3.12", os: macos-latest }
diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index 049cec2e5..d800d86f1 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -28,7 +28,7 @@ jobs:
           - { name: linux-python3.12-upgraded    , test-tox-env: pytest-py312-upgraded  , python-ver: "3.12", os: ubuntu-latest , upload-wheels: true }
           - { name: windows-python3.8-minimum    , test-tox-env: pytest-py38-minimum    , python-ver: "3.8" , os: windows-latest }
           - { name: windows-python3.12-upgraded  , test-tox-env: pytest-py312-upgraded  , python-ver: "3.12", os: windows-latest }
-          - { name: macos-python3.8-minimum      , test-tox-env: pytest-py38-minimum    , python-ver: "3.8" , os: macos-latest }
+          - { name: macos-python3.8-minimum      , test-tox-env: pytest-py38-minimum    , python-ver: "3.8" , os: macos-13 }
           - { name: macos-python3.12-upgraded    , test-tox-env: pytest-py312-upgraded  , python-ver: "3.12", os: macos-latest }
     steps:
       - name: Checkout repo with submodules