diff --git a/indexer/core/src/lib.rs b/indexer/core/src/lib.rs
index 53d0654e..29bd50b1 100644
--- a/indexer/core/src/lib.rs
+++ b/indexer/core/src/lib.rs
@@ -26,6 +26,7 @@ pub struct IndexerCore {
     pub store: IndexerStore,
 }
 
+//test
 #[derive(Clone)]
 /// This struct represents one L1 block data fetched from backfilling.
 pub struct BackfillBlockData {