diff --git a/client_test.go b/client_test.go
index 55f3903..cc2952e 100644
--- a/client_test.go
+++ b/client_test.go
@@ -1,7 +1,6 @@
 package rabbitmqrpc
 
 import (
-	"encoding/json"
 	"testing"
 )
 
@@ -18,9 +17,8 @@ func Test_Send(t *testing.T) {
 			"order_sn": "cccc",
 		},
 	}
-	data, _ := json.Marshal(msg)
 
-	ret, err := Send(exchange, key, string(data))
+	ret, err := Send(exchange, key, msg)
 
 	t.Log(ret)
 	t.Log(err)
diff --git a/send_delay_test.go b/send_delay_test.go
new file mode 100644
index 0000000..01f6cc2
--- /dev/null
+++ b/send_delay_test.go
@@ -0,0 +1,25 @@
+package rabbitmqrpc
+
+import (
+	"testing"
+)
+
+func Test_SendDelay(t *testing.T) {
+
+	exchange := "ex_order_delay"
+	key := "order_expire"
+
+	msg := map[string]interface{}{
+		"site_id": "100002",
+		"dbname":  "testing",
+		"data": map[string]string{
+			"order_id": "111",
+			"order_sn": "cccc",
+		},
+	}
+
+	ret, err := SendDelay(exchange, key, msg, 20)
+
+	t.Log(ret)
+	t.Log(err)
+}