diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f84b2ab8..beb506ff 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,5 +20,5 @@ jobs:
         uses: ./
       - name: Show output
         run: |
-          echo "${{ steps.changed-files.outputs }}"
+          echo "${{ toJSON(steps.changed-files.outputs) }}"