diff --git a/backend/src/__fixtures__/mempool-config.template.json b/backend/src/__fixtures__/mempool-config.template.json
index 7641c323b..afb9a8ae3 100644
--- a/backend/src/__fixtures__/mempool-config.template.json
+++ b/backend/src/__fixtures__/mempool-config.template.json
@@ -6,6 +6,7 @@
     "HTTP_PORT": 1,
     "SPAWN_CLUSTER_PROCS": 2,
     "API_URL_PREFIX": "__MEMPOOL_API_URL_PREFIX__",
+    "AUTOMATIC_BLOCK_REINDEXING": true,
     "POLL_RATE_MS": 3,
     "CACHE_DIR": "__MEMPOOL_CACHE_DIR__",
     "CLEAR_PROTECTION_MINUTES": 4,