diff --git a/gulp-tsd/gulp-tsd-tests.ts b/gulp-tsd/gulp-tsd-tests.ts
new file mode 100644
index 000000000..9475ace65
--- /dev/null
+++ b/gulp-tsd/gulp-tsd-tests.ts
@@ -0,0 +1,17 @@
+/// <reference path="./gulp-tsd.d.ts" />
+/// <reference path="../gulp/gulp.d.ts" />
+
+import gulp = require("gulp");
+import tsd = require("gulp-tsd");
+
+gulp.task("tsd", () => {
+    gulp.src("gulp_tsd.json")
+        .pipe(tsd());
+});
+
+gulp.task("tsd:options", callback => {
+    tsd({
+        command: "reinstall",
+        config: "tsd.json"
+    }, callback);
+});
diff --git a/gulp-tsd/gulp-tsd.d.ts b/gulp-tsd/gulp-tsd.d.ts
new file mode 100644
index 000000000..68a4c6728
--- /dev/null
+++ b/gulp-tsd/gulp-tsd.d.ts
@@ -0,0 +1,21 @@
+// Type definitions for gulp-tsd
+// Project: https://github.com/moznion/gulp-tsd
+// Definitions by: Keita Kagurazaka <https://github.com/k-kagurazaka>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../node/node.d.ts" />
+/// <reference path="../gulp/gulp.d.ts" />
+
+declare module "gulp-tsd" {
+
+    interface IOptions {
+        command?: string;
+        latest?: boolean;
+        config?: string;
+        opts?: Object;
+    }
+
+    function tsd(opts?: IOptions, callback?: gulp.ITaskCallback): NodeJS.ReadWriteStream;
+
+    export = tsd;
+}