diff --git a/.github/workflows/checkedc-clang-macos.yml b/.github/workflows/checkedc-clang-macos.yml
index 1cfb6c3..d486a7d 100644
--- a/.github/workflows/checkedc-clang-macos.yml
+++ b/.github/workflows/checkedc-clang-macos.yml
@@ -56,7 +56,7 @@ jobs:
   test_CheckedC_Clang_MacOS:
     name: Build and test Checked C Clang on MacOS
     needs: clean
-    runs-on: macos-latest
+    runs-on: [ macos-latest ]
     steps:
       - name: Checkout Checked C Clang code
         uses: actions/checkout@v2