diff --git a/spring-data-rest-webmvc/src/test/java/org/springframework/data/rest/test/webmvc/Customer.java b/spring-data-rest-webmvc/src/test/java/org/springframework/data/rest/test/webmvc/Customer.java
index afc963597..a36e96a42 100644
--- a/spring-data-rest-webmvc/src/test/java/org/springframework/data/rest/test/webmvc/Customer.java
+++ b/spring-data-rest-webmvc/src/test/java/org/springframework/data/rest/test/webmvc/Customer.java
@@ -12,7 +12,7 @@ import javax.validation.constraints.NotNull;
 public class Customer {
 
   @Id @GeneratedValue private Long   id;
-  @NotNull
+  @NotNull(message = "no.userid")
   private                     String userid;
 
   public Long getId() {