diff --git a/spring-batch-core/src/test/java/org/springframework/batch/core/repository/dao/DefaultExecutionContextSerializerTests.java b/spring-batch-core/src/test/java/org/springframework/batch/core/repository/dao/DefaultExecutionContextSerializerTests.java
index a9750fa8f..e21599431 100644
--- a/spring-batch-core/src/test/java/org/springframework/batch/core/repository/dao/DefaultExecutionContextSerializerTests.java
+++ b/spring-batch-core/src/test/java/org/springframework/batch/core/repository/dao/DefaultExecutionContextSerializerTests.java
@@ -87,6 +87,7 @@ public class DefaultExecutionContextSerializerTests {
 		ByteArrayOutputStream out = new ByteArrayOutputStream();
 		serializer.serialize(m1, out);
 
+		out.close();
 		String s = out.toString();
 
 		InputStream in = new ByteArrayInputStream(s.getBytes());