diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8ca8e8b92..2d6464201 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,6 +17,7 @@ jobs:
           - ubuntu-latest
           - windows-latest
           - macos-latest
+          - macos-13
     steps:
       - uses: actions/checkout@v4
 
diff --git a/action.yml b/action.yml
index cf33b14cf..3ca099cea 100644
--- a/action.yml
+++ b/action.yml
@@ -38,6 +38,14 @@ runs:
         elif [ "$RUNNER_OS" == "Windows" ]; then
           echo "$PGBIN" >> $GITHUB_PATH
           echo "PQ_LIB_DIR=$PGROOT\lib" >> $GITHUB_ENV
+        elif [ "$RUNNER_OS" == "macOS" ]; then
+          case "$(sw_vers -productVersion)" in
+            13.*)
+              # Unfortunately, the macOS 13 runner image doesn't come w/
+              # pre-installed PostgreSQL server.
+              brew install postgresql@14
+              ;;
+          esac
         fi
       shell: bash