diff --git a/plugins/completion-ml-ranking/resources/experiment.json b/plugins/completion-ml-ranking/resources/experiment.json
index 37d960d1fb1f..1dad031a2f08 100644
--- a/plugins/completion-ml-ranking/resources/experiment.json
+++ b/plugins/completion-ml-ranking/resources/experiment.json
@@ -294,7 +294,7 @@
     },
     {
       "id": "C++",
-      "experimentBucketsCount": 4,
+      "experimentBucketsCount": 2,
       "includeGroups": [22, 28],
       "shouldLogElementFeatures": false
     },