diff --git a/src/document.rs b/src/document.rs
index 31f1fe2..b9c682d 100644
--- a/src/document.rs
+++ b/src/document.rs
@@ -54,9 +54,9 @@ impl Document {
         let name = msg.get_data("name").unwrap().to_string();
         match self.data.get(&name) {
             Some(_) => {
-                let mut reply = msg.reply(MsgType::Error);
-                reply.add_data("error_type", ErrorType::DocumentAlreadyExists);
-                self.queue.send(reply).unwrap();
+                self.queue
+                    .send(msg.reply_with_error(ErrorType::DocumentAlreadyExists))
+                    .unwrap();
                 return;
             }
             None => {}
@@ -64,9 +64,9 @@ impl Document {
         let doc: Value = match serde_json::from_str(&msg.get_data("doc").unwrap().to_string()) {
             Ok(value) => value,
             Err(_) => {
-                let mut reply = msg.reply(MsgType::Error);
-                reply.add_data("error_type", ErrorType::DocumentInvalidRequest);
-                self.queue.send(reply).unwrap();
+                self.queue
+                    .send(msg.reply_with_error(ErrorType::DocumentInvalidRequest))
+                    .unwrap();
                 return;
             }
         };
@@ -86,11 +86,7 @@ impl Document {
                 holder.add_data("doc", data.clone());
                 holder
             }
-            None => {
-                let mut holder = msg.reply(MsgType::Error);
-                holder.add_data("error_type", ErrorType::DocumentNotFound);
-                holder
-            }
+            None => msg.reply_with_error(ErrorType::DocumentNotFound),
         };
         self.queue.send(reply).unwrap();
     }
diff --git a/src/queue.rs b/src/queue.rs
index b3f6bcc..2387131 100644
--- a/src/queue.rs
+++ b/src/queue.rs
@@ -1,4 +1,4 @@
-use crate::field::Field;
+use crate::{field::Field, ErrorType};
 use std::{
     collections::HashMap,
     sync::{mpsc::Sender, Arc, RwLock},
@@ -48,6 +48,12 @@ impl Message {
         }
     }
 
+    pub fn reply_with_error(&self, error: ErrorType) -> Self {
+        let mut reply = self.reply(MsgType::Error);
+        reply.add_data("error_type", error);
+        reply
+    }
+
     pub fn get_msg_type(&self) -> &MsgType {
         &self.msg_type
     }
@@ -181,6 +187,34 @@ mod messages {
         msg.reset_id();
         assert_ne!(msg.get_id(), id);
     }
+
+    #[test]
+    fn error_reply() {
+        let msg = Message::new(MsgType::Time);
+        let errors = [
+            ErrorType::DocumentAlreadyExists,
+            ErrorType::DocumentInvalidRequest,
+        ];
+        for error in errors.into_iter() {
+            let reply = msg.reply_with_error(error.clone());
+            assert_eq!(reply.get_id(), msg.get_id());
+            assert_eq!(
+                format!("{:?}", reply.get_msg_type()),
+                format!("{:?}", MsgType::Error)
+            );
+            assert_eq!(
+                format!(
+                    "{:?}",
+                    reply
+                        .get_data("error_type")
+                        .unwrap()
+                        .to_error_type()
+                        .unwrap()
+                ),
+                format!("{:?}", error)
+            );
+        }
+    }
 }
 
 #[derive(Clone)]