diff --git a/server/src/test/java/org/opensearch/index/mapper/DerivedFieldMapperQueryTests.java b/server/src/test/java/org/opensearch/index/mapper/DerivedFieldMapperQueryTests.java
index 64f4f1f3e083e..bd6d7b88ade28 100644
--- a/server/src/test/java/org/opensearch/index/mapper/DerivedFieldMapperQueryTests.java
+++ b/server/src/test/java/org/opensearch/index/mapper/DerivedFieldMapperQueryTests.java
@@ -197,8 +197,8 @@ public void setDocument(int docId) {
             }
 
             @Override
-            public Object execute() {
-                return raw_requests[docId][scriptIndex[0]];
+            public void execute() {
+                addEmittedValue(raw_requests[docId][scriptIndex[0]]);
             }
         };