diff --git a/upper-case-first/upper-case-first-tests.ts b/upper-case-first/upper-case-first-tests.ts
new file mode 100644
index 0000000000..2ca02dd74d
--- /dev/null
+++ b/upper-case-first/upper-case-first-tests.ts
@@ -0,0 +1,6 @@
+/// <reference path="upper-case-first.d.ts" />
+
+import upperCaseFirst = require('upper-case-first');
+
+console.log(upperCaseFirst(null));     // => ""
+console.log(upperCaseFirst('string')); // => "String"