diff --git a/server/src/test/java/org/opensearch/action/search/SearchRequestTests.java b/server/src/test/java/org/opensearch/action/search/SearchRequestTests.java
index f025e3a63b9bf..2896c30cc49be 100644
--- a/server/src/test/java/org/opensearch/action/search/SearchRequestTests.java
+++ b/server/src/test/java/org/opensearch/action/search/SearchRequestTests.java
@@ -244,6 +244,7 @@ private SearchRequest mutate(SearchRequest searchRequest) {
         );
         mutators.add(() -> mutation.source(randomValueOtherThan(searchRequest.source(), this::createSearchSourceBuilder)));
         mutators.add(() -> mutation.setCcsMinimizeRoundtrips(searchRequest.isCcsMinimizeRoundtrips() == false));
+        mutators.add(() -> mutation.setPhaseTook(searchRequest.isPhaseTook() == false));
         mutators.add(
             () -> mutation.setPhaseTook(searchRequest.isPhaseTook() == null ? randomBoolean() : searchRequest.isPhaseTook() == false)
         );