diff -r 000000000000 -r 6474c204b198 toolkit/components/workerloader/tests/moduleA-depends.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/workerloader/tests/moduleA-depends.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// A trivial module that depends on an equally trivial module
+let B = require("chrome://mochitests/content/chrome/toolkit/components/workerloader/tests/moduleB-dependency.js");
+
+// Ensure that the initial set of exports is empty
+if (Object.keys(exports).length) {
+  throw new Error("exports should be empty, initially");
+}
+
+// Export some values
+exports.A = true;
+exports.importedFoo = B.foo;