diff --git a/client/src/actions/index.js b/client/src/actions/index.js
index df7b5d1c..d366a0a6 100644
--- a/client/src/actions/index.js
+++ b/client/src/actions/index.js
@@ -439,7 +439,7 @@ export const testUpstream = servers => async (dispatch) => {
         });
 
         if (testMessages.every(message => message === 'OK')) {
-            dispatch(addSuccessToast('All servers is OK'));
+            dispatch(addSuccessToast('Specified DNS servers are working correctly'));
         }
 
         dispatch(testUpstreamSuccess());
diff --git a/control.go b/control.go
index 340f8479..a8bb391b 100644
--- a/control.go
+++ b/control.go
@@ -193,6 +193,7 @@ func handleStatus(w http.ResponseWriter, r *http.Request) {
 		"dns_address":      config.BindHost,
 		"dns_port":         config.CoreDNS.Port,
 		"querylog_enabled": config.CoreDNS.QueryLogEnabled,
+		"upstream_dns":     config.CoreDNS.UpstreamDNS,
 	}
 
 	json, err := json.Marshal(data)
diff --git a/openapi.yaml b/openapi.yaml
index 5c458978..e39fc090 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -61,6 +61,16 @@ paths:
             responses:
                 200:
                     description: OK
+                    examples:
+                        application/json:
+                            dns_address: 127.0.0.1
+                            dns_port: 53
+                            querylog_enabled: true
+                            running: true
+                            upstream_dns:
+                              - 1.1.1.1
+                              - 1.0.0.1
+                            version: "v0.1"
     /querylog:
         get:
             tags: