diff --git a/src/pipeline/src/etl/processor/json_path.rs b/src/pipeline/src/etl/processor/json_path.rs
index 46aaf638104f..c09d338c637f 100644
--- a/src/pipeline/src/etl/processor/json_path.rs
+++ b/src/pipeline/src/etl/processor/json_path.rs
@@ -216,6 +216,7 @@ mod test {
         let json_path = JsonPath::try_from("$.hello").unwrap();
         let processor = JsonPathProcessor {
             json_path,
+            result_idex: Some(0),
             ..Default::default()
         };