diff --git a/.github/workflows/test_changes.yml b/.github/workflows/test_changes.yml
index d2377c8..975244a 100644
--- a/.github/workflows/test_changes.yml
+++ b/.github/workflows/test_changes.yml
@@ -18,7 +18,7 @@ jobs:
         id: changed-installers
         uses: tj-actions/changed-files@v44
         with:
-          dir_names: true
+          files: programs/**
 
       - name: Get changed installer names
         id: changed
@@ -28,7 +28,7 @@ jobs:
         run: |
           {
             printf "changed_installers="
-            cat <<< "$CHANGED_FILES" \
+            printf "%s" "$CHANGED_FILES" \
             | cut -d/ -f2 | sort -u | jq -R | jq -s -c -M
           } >> "$GITHUB_OUTPUT"