diff --git a/.github/workflows/testbed.yaml b/.github/workflows/testbed.yaml
index f4ddd1f..c3daf78 100644
--- a/.github/workflows/testbed.yaml
+++ b/.github/workflows/testbed.yaml
@@ -148,7 +148,7 @@ jobs:
       - name: Collect Outcomes
         run: ./testbed-collect.py \
           testbed ${{ github.run_id }} ${{ github.run_attempt }} \
-          -o testbed/results.json ${{ inputs.update-index && '-D index' || '' }}
+          ${{ inputs.update-index && '-D index' || '-o testbed/results.json' }}
         env:
           GH_TOKEN: ${{ github.token }}
       - name: Update External Index