diff --git a/tests/python/lib/k2_server.py b/tests/python/lib/k2_server.py
index f31fdfa254..ac5961bafc 100644
--- a/tests/python/lib/k2_server.py
+++ b/tests/python/lib/k2_server.py
@@ -71,6 +71,7 @@ def _process_json_log(self, log_record):
         log_record.pop("file", "")
         log_record.pop("line", "")
         log_record.pop("hostname", "")
+        log_record.pop("cluster", "")
 
         # convert raw string to python dict
         tags = log_record.get("tags")