diff --git a/.github/workflows/CI-unixish.yml b/.github/workflows/CI-unixish.yml
index e1099bc99..bda66a7e0 100644
--- a/.github/workflows/CI-unixish.yml
+++ b/.github/workflows/CI-unixish.yml
@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, macos-10.15]
+        os: [ubuntu-18.04, ubuntu-20.04, macos-10.15, macos-11, macos-12]
       fail-fast: false # Prefer quick result
 
     runs-on: ${{ matrix.os }}