diff --git a/object-assign/object-assign-tests.ts b/object-assign/object-assign-tests.ts
new file mode 100644
index 000000000..53dfd5e70
--- /dev/null
+++ b/object-assign/object-assign-tests.ts
@@ -0,0 +1,17 @@
+/// <reference path="object-assign.d.ts" />
+import objectAssign = require("object-assign");
+
+function assign1() {
+  var result = objectAssign({hello: "world"});
+  return result;
+}
+
+function assign2() {
+  var result = objectAssign({hello: "world"}, {hello: "worlds", second: "extra"});
+  return result;
+}
+
+function assign3() {
+  var result = objectAssign({hello: "world"}, {hello: "worlds", second: "extra"}, {hello: "stop", the: "spinning"});
+  return result;
+}
diff --git a/object-assign/object-assign.d.ts b/object-assign/object-assign.d.ts
new file mode 100644
index 000000000..76789d003
--- /dev/null
+++ b/object-assign/object-assign.d.ts
@@ -0,0 +1,9 @@
+// Type definitions for object-assign 4.0.1
+// Project: https://github.com/sindresorhus/object-assign
+// Definitions by: Christopher Brown <https://github.com/chbrown>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module "object-assign" {
+  function objectAssign(target: any, ...sources: any[]): any;
+  export = objectAssign;
+}