diff --git a/tests/integration/dual-channel-replication.tcl b/tests/integration/dual-channel-replication.tcl
index b1aab1c23a..5302030db9 100644
--- a/tests/integration/dual-channel-replication.tcl
+++ b/tests/integration/dual-channel-replication.tcl
@@ -842,11 +842,11 @@ start_server {tags {"dual-channel-replication external:skip"}} {
     $primary config set dual-channel-replication-enabled yes
     $primary config set loglevel debug
     $primary config set repl-diskless-sync-delay 5
-    
+    $primary config set client-output-buffer-limit "replica 0 0 0"
+
     # Generating RDB will cost 5s(10000 * 0.0005s)
     $primary debug populate 10000 primary 1
     $primary config set rdb-key-save-delay 500
-
     $primary config set dual-channel-replication-enabled $dualchannel
 
     start_server {} {