diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a3a519cf..eb6e1a00 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,7 +13,7 @@ jobs:
     steps:
       # temporarily for MCFM
       - name: Choose MacOS SDK
-        if: matrix.config.os == 'macos-14'
+        if: matrix.config.os == 'macOS-14'
         run: sudo xcode-select -s /Applications/Xcode_14.3.1.app
 
       - name: Set up Homebrew