diff --git a/.github/workflows/sandwich.yml b/.github/workflows/sandwich.yml
index 2b530345..e1b38cb3 100644
--- a/.github/workflows/sandwich.yml
+++ b/.github/workflows/sandwich.yml
@@ -71,7 +71,7 @@ jobs:
         # For postgres context tests/demo
         brew install libpq postgresql
         # For older GHCs
-        brew install llvm@13
+        brew install llvm@13 --quiet # Suppress deprecation warning
         echo /opt/homebrew/opt/llvm@13/bin >> $GITHUB_PATH
         # https://gitlab.haskell.org/ghc/ghc/-/issues/20592#note_391266
         echo "C_INCLUDE_PATH=`xcrun --show-sdk-path`/usr/include/ffi" >> "$GITHUB_ENV"