diff --git a/spring-beans/src/testFixtures/java/org/springframework/beans/testfixture/beans/IndexedTestBean.java b/spring-beans/src/testFixtures/java/org/springframework/beans/testfixture/beans/IndexedTestBean.java
index fe99f9b5bba..39026aec6f9 100644
--- a/spring-beans/src/testFixtures/java/org/springframework/beans/testfixture/beans/IndexedTestBean.java
+++ b/spring-beans/src/testFixtures/java/org/springframework/beans/testfixture/beans/IndexedTestBean.java
@@ -181,6 +181,7 @@ public class IndexedTestBean {
 	}
 
 
+	@SuppressWarnings("serial")
 	public static class IterableMap<K,V> extends LinkedHashMap<K,V> implements Iterable<V> {
 
 		@Override