diff --git a/chai-subset/chai-subset-tests.ts b/chai-subset/chai-subset-tests.ts
new file mode 100644
index 000000000..8b88e5c6a
--- /dev/null
+++ b/chai-subset/chai-subset-tests.ts
@@ -0,0 +1,62 @@
+/// <reference path="chai-subset.d.ts" />
+
+import chai = require('chai');
+import chaiSubset = require('chai-subset');
+
+chai.use(chaiSubset);
+var expect = chai.expect;
+var assert = chai.assert;
+
+function test_containSubset() {
+    var obj: Object = {
+        a: 'b',
+        c: 'd',
+        e: {
+            foo: 'bar',
+            baz: {
+                qux: 'quux'
+            }
+        }
+    };
+
+    expect(obj).to.containSubset({
+        a: 'b',
+        e: {
+            baz: {
+                qux: 'quux'
+            }
+        }
+    });
+
+    obj.should.containSubset({ a: 'b' });
+}
+
+function test_notContainSubset() {
+    var obj: Object = {
+        a: 'b',
+        c: 'd',
+        e: {
+            foo: 'bar',
+            baz: {
+                qux: 'quux'
+            }
+        }
+    };
+
+    expect(obj).to.not.containSubset({ g: 'whatever' });
+    obj.should.not.containSubset({ g: 'whatever' });
+}
+
+function test_arrayContainSubset() {
+    var list: Array<Object> = [{a: 'a', b: 'b'}, {v: 'f', d: {z: 'g'}} ];
+
+    expect(list).to.containSubset([{a:'a',  b: 'b'}]);
+    list.should.containSubset([{a:'a',  b: 'b'}]);
+}
+
+function test_arrayNotContainSubset() {
+    var list: Array<Object> = [{a: 'a', b: 'b'}, {v: 'f', d: {z: 'g'}} ];
+
+    expect(list).not.to.containSubset([{a:'a', b: 'bd'}]);
+    list.should.not.containSubset([{a:'a', b: 'bd'}]);
+}
diff --git a/chai-subset/chai-subset.d.ts b/chai-subset/chai-subset.d.ts
new file mode 100644
index 000000000..44bbef9cc
--- /dev/null
+++ b/chai-subset/chai-subset.d.ts
@@ -0,0 +1,21 @@
+// Type definitions for chai-subset 1.0.0
+// Project: https://github.com/e-conomic/chai-subset
+// Definitions by: Sam Noedel <https://github.com/delta62/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../chai/chai.d.ts" />
+
+declare module Chai {
+    interface Assertion {
+        containSubset(obj: Object): Assertion;
+    }
+}
+
+interface Object {
+    should: Chai.Assertion;
+}
+
+declare module "chai-subset" {
+    function chaiSubset(chai: any, utils: any): void;
+    export = chaiSubset;
+}