diff --git a/jsesc/jsesc-tests.ts b/jsesc/jsesc-tests.ts
new file mode 100644
index 0000000000..355b2a7988
--- /dev/null
+++ b/jsesc/jsesc-tests.ts
@@ -0,0 +1,45 @@
+/// <reference path="jsesc.d.ts" />
+
+import jsesc = require('jsesc');
+import Opts = jsesc.Opts;
+
+// ---- ---- ---- ---- ---- ---- ----
+
+var num: number;
+var str: string;
+var bool: boolean;
+var opts: Opts;
+var opts: Opts;
+
+// ---- ---- ---- ---- ---- ---- ----
+
+str = jsesc.version;
+
+// ---- ---- ---- ---- ---- ---- ----
+
+opts = {
+	quotes: str
+};
+opts = {
+	wrap: bool
+};
+opts = {
+	es6: bool
+};
+opts = {
+	escapeEverything: bool
+};
+opts = {
+	compact: bool
+};
+opts = {
+	indent: str
+};
+opts = {
+	json: bool
+};
+
+// ---- ---- ---- ---- ---- ---- ----
+
+str = jsesc(str);
+str = jsesc(str, opts);
diff --git a/jsesc/jsesc.d.ts b/jsesc/jsesc.d.ts
new file mode 100644
index 0000000000..76b40cf455
--- /dev/null
+++ b/jsesc/jsesc.d.ts
@@ -0,0 +1,25 @@
+// Type definitions for jsesc 0.4.3
+// Project: https://github.com/mathiasbynens/jsesc
+// Definitions by: Bart van der Schoor <https://github.com/Bartvds>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module 'jsesc' {
+
+	function jsesc(str: string, opts?: any): string;
+
+	module jsesc {
+		var version: string;
+
+		interface Opts {
+			quotes?: string;
+			wrap?: boolean;
+			es6?: boolean;
+			escapeEverything?: boolean;
+			compact?: boolean;
+			indent?: string;
+			json?: boolean;
+		}
+	}
+
+	export = jsesc;
+}