diff --git a/open/open-tests.ts b/open/open-tests.ts
new file mode 100644
index 000000000..a529fa9cf
--- /dev/null
+++ b/open/open-tests.ts
@@ -0,0 +1,6 @@
+/// <reference path="open.d.ts" />
+
+import open = require('open');
+
+open('foo');
+open('foo', 'bar');
diff --git a/open/open.d.ts b/open/open.d.ts
new file mode 100644
index 000000000..c32e80bfe
--- /dev/null
+++ b/open/open.d.ts
@@ -0,0 +1,9 @@
+// Type definitions for open 0.0.3
+// Project: https://github.com/jjrdn/node-open
+// Definitions by: Bart van der Schoor <https://github.com/Bartvds>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module 'open' {
+	function open(target: string, app?: string): void;
+	export = open;
+}