diff --git a/chai-string/chai-string-tests.ts b/chai-string/chai-string-tests.ts
new file mode 100644
index 0000000000..f5380b0768
--- /dev/null
+++ b/chai-string/chai-string-tests.ts
@@ -0,0 +1,128 @@
+/// <reference path="chai-string.d.ts" />
+/// <reference path="../mocha/mocha.d.ts" />
+/// <reference path="../node/node.d.ts" />
+
+var should = chai.should();
+var assert = chai.assert;
+var expect = chai.expect;
+
+var chai_string = require('chai-string');
+chai.use(chai_string);
+
+describe('chai-string', function() {
+
+  describe('#startsWith', function() {
+
+    it('check that', function() {
+      var obj = { foo: 'hello world' };
+      expect(obj).to.have.property('foo').that.startsWith('hello');
+    });
+
+  });
+
+  describe('#startWith', function() {
+
+    it('should return true', function() {
+      var str = 'abcdef',
+        prefix = 'abc';
+      str.should.startWith(prefix);
+    });
+
+    it('should return false', function() {
+      var str = 'abcdef',
+        prefix = 'cba';
+      str.should.not.startWith(prefix);
+    });
+
+  });
+
+  describe('#endWith', function() {
+
+    it('should return true', function() {
+      var str = 'abcdef',
+        suffix = 'def';
+      str.should.endWith(suffix);
+    });
+
+    it('should return false', function() {
+      var str = 'abcdef',
+        suffix = 'fed';
+      str.should.not.endWith(suffix);
+    });
+
+  });
+
+  describe('tdd alias', function() {
+
+    beforeEach(function() {
+      this.str = 'abcdef';
+      this.str2 = 'a\nb\tc\r d  ef';
+    });
+
+    it('.startsWith', function() {
+      assert.startsWith(this.str, 'abc');
+    });
+
+    it('.notStartsWith', function() {
+      assert.notStartsWith(this.str, 'cba');
+    });
+
+    it('.endsWith', function() {
+      assert.endsWith(this.str, 'def');
+    });
+
+    it('.notEndsWith', function() {
+      assert.notEndsWith(this.str, 'fed');
+    });
+
+    it('.equalIgnoreCase', function() {
+      assert.equalIgnoreCase(this.str, 'AbCdEf');
+    });
+
+    it('.notEqualIgnoreCase', function() {
+      assert.notEqualIgnoreCase(this.str, 'abDDD');
+    });
+
+    it('.equalIgnoreSpaces', function() {
+      assert.equalIgnoreSpaces(this.str, this.str2);
+    });
+
+    it('.notEqualIgnoreSpaces', function() {
+      assert.notEqualIgnoreSpaces(this.str, this.str2 + 'g');
+    });
+
+    it('.singleLine', function() {
+      assert.singleLine(this.str);
+    });
+
+    it('.notSingleLine', function() {
+      assert.notSingleLine("abc\ndef");
+    });
+
+    it('.reverseOf', function() {
+      assert.reverseOf(this.str, 'fedcba');
+    });
+
+    it('.notReverseOf', function() {
+      assert.notReverseOf(this.str, 'aaaaa');
+    });
+
+    it('.palindrome', function() {
+      assert.palindrome('abcba');
+      assert.palindrome('abccba');
+      assert.palindrome('');
+    });
+
+    it('.notPalindrome', function() {
+      assert.notPalindrome(this.str);
+    });
+
+    it('.entriesCount', function() {
+      assert.entriesCount('abcabd', 'ab', 2);
+      assert.entriesCount('ababd', 'ab', 2);
+      assert.entriesCount('abab', 'ab', 2);
+      assert.entriesCount('', 'ab', 0);
+    });
+
+  });
+});
diff --git a/chai-string/chai-string.d.ts b/chai-string/chai-string.d.ts
new file mode 100644
index 0000000000..fd17665232
--- /dev/null
+++ b/chai-string/chai-string.d.ts
@@ -0,0 +1,45 @@
+// Type definitions for chai-string 1.1.4
+// Project: https://github.com/onechiporenko/chai-string
+// Definitions by: Nick Malaguti <https://github.com/nmalaguti/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+///<reference path="../chai/chai.d.ts" />
+
+declare module Chai {
+    interface Assertion extends LanguageChains, NumericComparison, TypeComparison {
+        startsWith(expected: string, message?: string): Assertion;
+        startWith(expected: string, message?: string): Assertion;
+        endsWith(expected: string, message?: string): Assertion;
+        endWith(expected: string, message?: string): Assertion;
+        equalIgnoreCase(expected: string, message?: string): Assertion;
+        equalIgnoreSpaces(expected: string, message?: string): Assertion;
+        singleLine(message?: string): Assertion;
+        reverseOf(message?: string): Assertion;
+        palindrome(message?: string): Assertion;
+        entriesCount(substr: string, expected: number, message?: string): Assertion;
+    }
+
+    export interface Assert {
+        startsWith(val: string, exp: string, msg?: string): void;
+        notStartsWith(val: string, exp: string, msg?: string): void;
+        endsWith(val: string, exp: string, msg?: string): void;
+        notEndsWith(val: string, exp: string, msg?: string): void;
+        equalIgnoreCase(val: string, exp: string, msg?: string): void;
+        notEqualIgnoreCase(val: string, exp: string, msg?: string): void;
+        equalIgnoreSpaces(val: string, exp: string, msg?: string): void;
+        notEqualIgnoreSpaces(val: string, exp: string, msg?: string): void;
+        singleLine(val: string, msg?: string): void;
+        notSingleLine(val: string, msg?: string): void;
+        reverseOf(val: string, exp: string, msg?: string): void;
+        notReverseOf(val: string, exp: string, msg?: string): void;
+        palindrome(val: string, msg?: string): void;
+        notPalindrome(val: string, msg?: string): void;
+        entriesCount(str: string, substr: string, count: number, msg?: string): void;
+    }
+}
+
+declare module 'chai-string' {
+    function chaiString(chai: any, utils: any): void;
+    namespace chaiString {}
+    export = chaiString;
+}