diff --git a/spring-webmvc/src/test/java/org/springframework/web/servlet/handler/HandlerMappingIntrospectorTests.java b/spring-webmvc/src/test/java/org/springframework/web/servlet/handler/HandlerMappingIntrospectorTests.java
index 600ae8b88655..8037a5cad579 100644
--- a/spring-webmvc/src/test/java/org/springframework/web/servlet/handler/HandlerMappingIntrospectorTests.java
+++ b/spring-webmvc/src/test/java/org/springframework/web/servlet/handler/HandlerMappingIntrospectorTests.java
@@ -399,6 +399,7 @@ public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
 	}
 
 
+	@SuppressWarnings("serial")
 	private static class TestServlet extends HttpServlet {
 
 		@Override