diff --git a/test/benchmark/test-benchmark-cluster.js b/test/benchmark/test-benchmark-cluster.js
index d6e3b27ee89f81..26df7ec239a221 100644
--- a/test/benchmark/test-benchmark-cluster.js
+++ b/test/benchmark/test-benchmark-cluster.js
@@ -4,4 +4,9 @@ require('../common');
 
 const runBenchmark = require('../common/benchmark');
 
-runBenchmark('cluster', ['n=1', 'payload=string', 'sendsPerBroadcast=1']);
+runBenchmark('cluster', [
+  'n=1',
+  'payload=string',
+  'sendsPerBroadcast=1',
+  'serialization=json',
+]);