diff --git a/gulp-ruby-sass/gulp-ruby-sass-tests.ts b/gulp-ruby-sass/gulp-ruby-sass-tests.ts
new file mode 100644
index 0000000000..cba0c4c60d
--- /dev/null
+++ b/gulp-ruby-sass/gulp-ruby-sass-tests.ts
@@ -0,0 +1,14 @@
+/// <reference path="./gulp-ruby-sass.d.ts"/>
+/// <reference path="../gulp/gulp.d.ts"/>
+import gulp = require("gulp");
+import sass = require("gulp-ruby-sass");
+
+gulp.task('sass', function () {
+    sass('./scss/*.scss')
+        .pipe(gulp.dest('./css'));
+});
+
+gulp.task('sass', function () {
+    sass('./scss/', {verbose: true, style: 'compact'})
+        .pipe(gulp.dest('./css'));
+});
diff --git a/gulp-ruby-sass/gulp-ruby-sass.d.ts b/gulp-ruby-sass/gulp-ruby-sass.d.ts
new file mode 100644
index 0000000000..bb0c56328d
--- /dev/null
+++ b/gulp-ruby-sass/gulp-ruby-sass.d.ts
@@ -0,0 +1,68 @@
+// Type definitions for gulp-ruby-sass v1.0.5
+// Project: https://github.com/sindresorhus/gulp-ruby-sass
+// Definitions by: Agnislav Onufrijchuk <https://github.com/agnislav>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../node/node.d.ts"/>
+
+declare module "gulp-ruby-sass" {
+    /**
+     * The interface includes all options that available for sass executable.
+     * Options are converted from dashed to camelCase
+     * @interface SassOptions
+     */
+    interface SassOptions {
+        loadPath?: string | string[];
+        require?: string;
+        compass?: boolean;
+        style?: string;
+        force?: boolean;
+        stopOnError?: boolean;
+        scss?: boolean;
+        defaultEncoding?: string;
+        unixNewlines?: boolean;
+        debugInfo?: boolean;
+        lineNumbers?: boolean;
+        lineComments?: boolean;
+        check?: boolean;
+        precision?: number;
+        cacheLocation?: string;
+        noCache?: boolean;
+        trace?: boolean;
+        quiet?: boolean;
+
+        // Actually, there should be a string. However due to ts spec, overriding member should be the same type or a subtype.
+        // http://stackoverflow.com/questions/19605557/incompatible-static-properties-in-three-d-ts-with-latest-typescript
+        // We need Options.soucemap to be boolean, so here 'any' is used instead of string.
+        sourcemap?: any;
+
+        // All listed below options are acceptable by the sass executable and potentially may be used from js.
+        // However I doubt are there cases when it's meaningful
+        watch?: string;
+        update?: string;
+        stdin?: boolean;
+        interactive?: boolean;
+    }
+
+    /**
+     * The interface includes the node-ruby-sass only options.
+     * Attention: sourcemap option type differs from the same SassOption's type.
+     * @interface Options
+     * @extends SassOptions
+     */
+    interface Options extends SassOptions {
+        verbose?: boolean;
+        bundleExec?: boolean;
+        sourcemap?: boolean;
+        container?: string;
+    }
+
+    /**
+     * Object to be exported
+     * @param {string} source - Filename or directory
+     * @param {Options} options - Additional processing rules/options
+     */
+    function sass(source: string, options?: Options): NodeJS.ReadableStream;
+
+    export = sass;
+}