diff --git a/x-pack/test/alerting_api_integration/basic/tests/actions/builtin_action_types/es_index.ts b/x-pack/test/alerting_api_integration/basic/tests/actions/builtin_action_types/es_index.ts
index 5da8a909dcfe8..ec07f6ff44df6 100644
--- a/x-pack/test/alerting_api_integration/basic/tests/actions/builtin_action_types/es_index.ts
+++ b/x-pack/test/alerting_api_integration/basic/tests/actions/builtin_action_types/es_index.ts
@@ -19,7 +19,9 @@ export default function indexTest({ getService }: FtrProviderContext) {
         .send({
           name: 'An index action',
           actionTypeId: '.index',
-          config: {},
+          config: {
+            index: 'foo',
+          },
           secrets: {},
         })
         .expect(200);