diff --git a/depd/depd-tests.ts b/depd/depd-tests.ts
new file mode 100644
index 0000000000..14dfbe72c4
--- /dev/null
+++ b/depd/depd-tests.ts
@@ -0,0 +1,54 @@
+/// <reference path="./depd.d.ts"/>
+
+import depd = require('depd');
+
+var deprecate = depd("depd-tests");
+
+function assert(condition: boolean, message: string): void {
+    if (!condition) {
+        throw new Error(message);
+    }
+}
+
+function testDepdMessage(...args: string[]): boolean {
+    if (arguments.length < 1) {
+        deprecate('testDepdMessage argument.lenth<1');
+        return true;
+    } else {
+        console.log('normal logic');
+        return false;
+    }
+}
+
+assert(testDepdMessage() === true, "Deprecated code must be triggered!");
+assert(testDepdMessage('a') === false, "Deprecated code must be triggered!");
+
+interface ITestObject {
+    p1: string;
+    p2: string;
+}
+
+var obj = <ITestObject>{ p1: 'deprecated property', p2: 'normal property' };
+deprecate.property(obj, 'p1', 'property [p1] is deprecated!');
+
+console.log(obj.p1);
+
+interface ITestDeprecatedFunction {
+    func1?: Function;
+    func2?: Function;
+}
+
+var obj2 = <ITestDeprecatedFunction>{};
+
+// message automatically derived from function name 
+obj2.func1 = deprecate.function(function func1() {
+    console.log('all calls to [func1] are deprecated ');
+});
+
+// specific message 
+obj2.func2 = deprecate.function(function () {
+    console.log('all calls to [func2] are deprecated ');
+}, 'func2');
+
+obj2.func1();
+obj2.func2();
\ No newline at end of file
diff --git a/depd/depd.d.ts b/depd/depd.d.ts
new file mode 100644
index 0000000000..33f7b72a04
--- /dev/null
+++ b/depd/depd.d.ts
@@ -0,0 +1,17 @@
+// Type definitions for nodejs package depd 1.1.0
+// Project: https://github.com/dougwilson/nodejs-depd
+// Definitions by: Zhiyuan Wang <https://github.com/danny8002/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+
+declare module 'depd' {
+    function depd(namespace: string): Deprecate;
+
+    interface Deprecate {
+        (message: string): void;
+        function(fn: Function, message?: string): Function;
+        property(obj: Object, prop: string, message: string): void;
+    }
+
+    export = depd;
+}
\ No newline at end of file