diff --git a/src/test/org/apache/commons/collections/map/TestCompositeMap.java b/src/test/org/apache/commons/collections/map/TestCompositeMap.java
index 3376513aa..67881ce35 100644
--- a/src/test/org/apache/commons/collections/map/TestCompositeMap.java
+++ b/src/test/org/apache/commons/collections/map/TestCompositeMap.java
@@ -135,6 +135,8 @@ public class TestCompositeMap<K, V> extends AbstractTestIterableMap<K, V> {
     public void testResolveCollision() {
         CompositeMap<K, V> map = new CompositeMap<K, V>(buildOne(), buildTwo(), 
             new CompositeMap.MapMutator<K, V>() {
+            private static final long serialVersionUID = 1L;
+
             public void resolveCollision(CompositeMap<K, V> composite,
             Map<K, V> existing,
             Map<K, V> added,
@@ -160,6 +162,7 @@ public class TestCompositeMap<K, V> extends AbstractTestIterableMap<K, V> {
     public void testPut() {
         CompositeMap<K, V> map = new CompositeMap<K, V>(buildOne(), buildTwo(), 
             new CompositeMap.MapMutator<K, V>() {
+            private static final long serialVersionUID = 1L;
             public void resolveCollision(CompositeMap<K, V> composite,
             Map<K, V> existing,
             Map<K, V> added,
@@ -185,6 +188,7 @@ public class TestCompositeMap<K, V> extends AbstractTestIterableMap<K, V> {
     public void testPutAll() {
         CompositeMap<K, V> map = new CompositeMap<K, V>(buildOne(), buildTwo(), 
             new CompositeMap.MapMutator<K, V>() {
+            private static final long serialVersionUID = 1L;
             public void resolveCollision(CompositeMap<K, V> composite,
             Map<K, V> existing,
             Map<K, V> added,
diff --git a/src/test/org/apache/commons/collections/set/TestCompositeSet.java b/src/test/org/apache/commons/collections/set/TestCompositeSet.java
index 0b96ec198..2f59a8f2a 100644
--- a/src/test/org/apache/commons/collections/set/TestCompositeSet.java
+++ b/src/test/org/apache/commons/collections/set/TestCompositeSet.java
@@ -99,6 +99,8 @@ public class TestCompositeSet<E> extends AbstractTestSet<E> {
         Set<E> two = buildTwo();
         CompositeSet<E> set = new CompositeSet<E>(new Set[] { one, two });
         set.setMutator(new CompositeSet.SetMutator<E>() {
+            private static final long serialVersionUID = 1L;
+
             public void resolveCollision(CompositeSet<E> comp, Set<E> existing,
                 Set<E> added, Collection<E> intersects) {
                 //noop