diff --git a/notifyjs/notifyjs-tests.ts b/notifyjs/notifyjs-tests.ts
index 1b1d7f906..3289791de 100644
--- a/notifyjs/notifyjs-tests.ts
+++ b/notifyjs/notifyjs-tests.ts
@@ -14,7 +14,7 @@ function test_Notify_constructor() {
         body : "fuga",
         icon : "./logo.png",
         tag  : "user",
-        timeout  : 1000,
+        timeout: 2,
         notifyShow : (e:Event)=> console.log("notifyShow", e),
         notifyClose : ()=> console.log("notifyClose"),
         notifyClick : ()=> console.log("notifyClick"),
@@ -27,9 +27,10 @@ function test_Notify_constructor() {
 }
 
 function test_Notify_static_methods() {
-    Notify.needsPermission();
+    Notify.needsPermission;
     Notify.requestPermission();
     Notify.requestPermission(()=> console.log("onPermissionGrantedCallback"));
     Notify.requestPermission(()=> console.log("onPermissionGrantedCallback"), ()=> console.log("onPermissionDeniedCallback"));
-    Notify.isSupported();
+    Notify.isSupported;
+    Notify.permissionLevel;
 }
diff --git a/notifyjs/notifyjs.d.ts b/notifyjs/notifyjs.d.ts
index 5fe321efa..1c683084d 100644
--- a/notifyjs/notifyjs.d.ts
+++ b/notifyjs/notifyjs.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for notify.js 1.2.0
+// Type definitions for notify.js 1.2.3
 // Project: https://github.com/alexgibson/notify.js
 // Definitions by: soundTricker <https://github.com/soundTricker>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
@@ -27,6 +27,7 @@ declare var Notify: {
 
     /**
      * shows the user's current permission level (granted, denied or default), returns null if notifications are not supported.
+     * @return 'granted' : permission has been given, 'denied' : permission has been denied, 'default' : permission has not yet been set, null : notifications are not supported
      */
     permissionLevel: string;
 }