diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 38363692..391c657a 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -33,7 +33,7 @@
          ]
          include:
            - environment-file: ci/312-latest.yaml
-             os: macos-latest
+             os: macos-13 # Intel
            - environment-file: ci/312-latest.yaml
              os: macos-14 # Apple Silicon
            - environment-file: ci/312-latest.yaml