diff --git a/.github/workflows/fetch-and-ingest-branch.yaml b/.github/workflows/fetch-and-ingest-branch.yaml
index 5bf3e1b6..eabaf6e1 100644
--- a/.github/workflows/fetch-and-ingest-branch.yaml
+++ b/.github/workflows/fetch-and-ingest-branch.yaml
@@ -34,6 +34,8 @@ jobs:
       runtime: aws-batch
       env: |
         NEXTSTRAIN_DOCKER_IMAGE: ${{ inputs.image }}
+        GITHUB_RUN_ID: ${{ github.run_id }}
+        SLACK_CHANNELS: ${{ vars.TEST_SLACK_CHANNEL }}
         UPLOAD_CONFIG: ${{ needs.set_config_overrides.outputs.upload_config }}
       run: |
         nextstrain build \
@@ -44,6 +46,9 @@ jobs:
           --memory 64gib \
           --env AWS_ACCESS_KEY_ID \
           --env AWS_SECRET_ACCESS_KEY \
+          --env GITHUB_RUN_ID \
+          --env SLACK_TOKEN \
+          --env SLACK_CHANNELS \
           ingest \
             --configfiles config/config.yaml config/optional.yaml \
-            --config trigger_rebuild=False send_slack_notifications=False upload="$UPLOAD_CONFIG"
+            --config trigger_rebuild=False send_slack_notifications=True upload="$UPLOAD_CONFIG"