diff --git a/types/kraken-js/index.d.ts b/types/kraken-js/index.d.ts
index 776228f0ac..0980e31eb1 100644
--- a/types/kraken-js/index.d.ts
+++ b/types/kraken-js/index.d.ts
@@ -5,22 +5,24 @@
 // TypeScript Version: 2.2
 
 import { Express } from 'express';
+import { EventEmitter } from 'events';
 
 declare function k(options?: k.Options | string): Express;
 
 declare namespace k {
-    interface Kraken extends Express {
-        once(name: string, cb: (err: Error | null, result?: any) => any): void;
+    interface Kraken extends Express, EventEmitter {
         kraken: Kraken;
     }
 
     interface Options {
         protocols?: object;
         basedir?: string;
+        configdir?: string;
         mountpath?: string;
         inheritViews?: boolean;
-        startupHeaders?: Map<string, string>;
-        onconfig?(config: object, next: (err: Error | null, config?: object) => any): any;
+        startupHeaders?: { [key: string]: string; };
+        onconfig?(config: Map<string, any>, next: (err: Error | null, config?: object) => any): any;
+        uncaughtException?(err: Error): any;
     }
 }
 
diff --git a/types/kraken-js/kraken-js-tests.ts b/types/kraken-js/kraken-js-tests.ts
index 86e44caae1..f3b7eea8c7 100644
--- a/types/kraken-js/kraken-js-tests.ts
+++ b/types/kraken-js/kraken-js-tests.ts
@@ -2,6 +2,7 @@ import express = require('express');
 import kraken = require('kraken-js');
 import * as http from 'http';
 import * as https from 'https';
+import { readFile } from 'fs';
 
 const app = express() as kraken.Kraken;
 
@@ -13,16 +14,55 @@ kraken('path/to/options');
 
 // $ExpectType Express
 kraken({
-    onconfig: (config, next) => {
+    basedir: __dirname,
+    onconfig(config, next) {
+        config.get('view engines:js:renderer:arguments').push(app);
+        config.set('some:string', '/foo');
+        config.set('some:complex:type', [{
+            uncaughtException(error: Error) {
+                next(error);
+            }
+        }]);
         next(null, config);
+    },
+    protocols: {
+        file(value: string, callback: any) {
+            readFile(value, 'utf8', callback);
+        }
+    },
+    startupHeaders: {
+        'Custom-Header1': 'Header1',
+        'Custom-Header2': 'Header2'
+    },
+    uncaughtException(err) {
+        console.error(err);
     }
 });
 
 // $ExpectType Kraken
 app.use(kraken());
 
-// $ExpectType void
-app.once('event', (err, result) => {});
+// $ExpectType Kraken
+app.use(kraken(__dirname));
+
+// $ExpectType Kraken
+app.use(kraken({
+    configdir: 'config',
+    protocols: {
+        custom(value: any) {
+            return `Hello, ${ value }!`;
+        }
+    }
+}));
+
+app.listen(8080, (err?: Error) => {
+    console.log('[%s] Listening on http://localhost:%d', app.settings.env, 8080);
+});
+
+new Promise(resolve => {
+    // $ExpectType Kraken
+    app.once('event', resolve);
+});
 
 // $ExpectType any
 app.kraken.get('configProp');