diff --git a/packages/client-search/src/types/SearchResponse.ts b/packages/client-search/src/types/SearchResponse.ts
index 698fe3245..dc6cb62cd 100644
--- a/packages/client-search/src/types/SearchResponse.ts
+++ b/packages/client-search/src/types/SearchResponse.ts
@@ -155,6 +155,11 @@ export type SearchResponse<TObject = {}> = {
    */
   indexUsed?: string;
 
+  /**
+   * If a search encounters an index that is being A/B tested, abTestID reports the ongoing A/B test ID.
+   */
+  abTestID?: number;
+
   /**
    * In case of AB test, reports the variant ID used. The variant ID is the position in the array of variants (starting at 1).
    */