diff --git a/.github/workflows/blank.yml b/.github/workflows/blank.yml
index 36674aec7..51b47eb4a 100644
--- a/.github/workflows/blank.yml
+++ b/.github/workflows/blank.yml
@@ -21,6 +21,8 @@ jobs:
         os:
           - ubuntu-latest
           - macos-latest
+          # intel macos
+          - macos-13
         ocaml-compiler:
           - 4.14.2