diff --git a/cordova/plugins/Contacts.d.ts b/cordova/plugins/Contacts.d.ts
index 29a9a596c..275e8f2fd 100644
--- a/cordova/plugins/Contacts.d.ts
+++ b/cordova/plugins/Contacts.d.ts
@@ -32,7 +32,7 @@ interface Contacts {
      */
     find(fields: string[],
         onSuccess: (contacts: Contact[]) => void,
-        onError: (error: ContactError) => void,
+        onError?: (error: ContactError) => void,
         options?: ContactFindOptions): void;
     /**
      * The navigator.contacts.pickContact method launches the Contact Picker to select a single contact.
diff --git a/cors/cors-tests.ts b/cors/cors-tests.ts
new file mode 100644
index 000000000..a3f5ea10e
--- /dev/null
+++ b/cors/cors-tests.ts
@@ -0,0 +1,11 @@
+/// <reference path="cors.d.ts" />
+
+import express = require('express');
+import cors = require('cors');
+
+var app = express();
+app.use(cors());
+app.use(cors({
+    maxAge: 100,
+    credentials: true
+}));
diff --git a/cors/cors.d.ts b/cors/cors.d.ts
new file mode 100644
index 000000000..92fdd9634
--- /dev/null
+++ b/cors/cors.d.ts
@@ -0,0 +1,24 @@
+// Type definitions for cors
+// Project: https://github.com/troygoode/node-cors/
+// Definitions by: Mihhail Lapushkin <https://github.com/mihhail-lapushkin/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../express/express.d.ts" />
+
+declare module "cors" {
+    import express = require('express');
+
+    module e {
+        interface CorsOptions  {
+            origin?: any;
+            methods?: any;
+            allowedHeaders?: any;
+            exposedHeaders?: any;
+            credentials?: boolean;
+            maxAge?: number;
+        }
+    }
+
+    function e(options?: e.CorsOptions): express.RequestHandler;
+    export = e;
+}
\ No newline at end of file
diff --git a/tea-merge/tea-merge-tests.ts b/tea-merge/tea-merge-tests.ts
new file mode 100644
index 000000000..9d59bd65e
--- /dev/null
+++ b/tea-merge/tea-merge-tests.ts
@@ -0,0 +1,6 @@
+/// <reference path="tea-merge.d.ts" />
+
+import merge = require('tea-merge');
+
+merge({ a: 1 }, { b: 2 }, { c: 'hello' });
+merge({ a1: true, a2: { b: 'hello' } }, { bca: [], a2: { c: 'world' } });
diff --git a/tea-merge/tea-merge.d.ts b/tea-merge/tea-merge.d.ts
new file mode 100644
index 000000000..2000e9bcd
--- /dev/null
+++ b/tea-merge/tea-merge.d.ts
@@ -0,0 +1,9 @@
+// Type definitions for tea-merge
+// Project: https://github.com/qualiancy/tea-merge
+// Definitions by: Mihhail Lapushkin <https://github.com/mihhail-lapushkin/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module "tea-merge" {
+    function e(destination: Object, ...sources: Object[]): Object;
+    export = e;
+}
\ No newline at end of file