diff --git a/spring-integration-ip/src/test/java/org/springframework/integration/ip/tcp/connection/TcpNioConnectionTests.java b/spring-integration-ip/src/test/java/org/springframework/integration/ip/tcp/connection/TcpNioConnectionTests.java
index a6e7f79238..f09c57bd68 100644
--- a/spring-integration-ip/src/test/java/org/springframework/integration/ip/tcp/connection/TcpNioConnectionTests.java
+++ b/spring-integration-ip/src/test/java/org/springframework/integration/ip/tcp/connection/TcpNioConnectionTests.java
@@ -697,7 +697,7 @@ public class TcpNioConnectionTests {
 		ioExec.initialize();
 		ThreadPoolTaskExecutor assemblerExec = new ThreadPoolTaskExecutor();
 		assemblerExec.setCorePoolSize(2);
-		assemblerExec.setMaxPoolSize(5);
+		assemblerExec.setMaxPoolSize(10);
 		assemblerExec.setQueueCapacity(0);
 		assemblerExec.setThreadNamePrefix("assembler-");
 		assemblerExec.setRejectedExecutionHandler(new AbortPolicy());