diff --git a/src/test/java/com/fasterxml/jackson/databind/introspect/TestAnnotionBundles.java b/src/test/java/com/fasterxml/jackson/databind/introspect/TestAnnotionBundles.java
index e8d1af606e..804afa8d06 100644
--- a/src/test/java/com/fasterxml/jackson/databind/introspect/TestAnnotionBundles.java
+++ b/src/test/java/com/fasterxml/jackson/databind/introspect/TestAnnotionBundles.java
@@ -83,6 +83,7 @@ static class InformingHolder {
         @InformativeHolder public int unimportant = 42;
     }
 
+    @SuppressWarnings("serial")
     static class BundleAnnotationIntrospector extends JacksonAnnotationIntrospector {
         @Override
         public PropertyName findNameForSerialization(Annotated a)