diff -r 000000000000 -r 6474c204b198 addon-sdk/test/browser_sdk_loader_sdk_gui_modules.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/test/browser_sdk_loader_sdk_gui_modules.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+function test () {
+  // Load `constructor` as global since tabs uses `traits`
+  // that use this module
+  let loader = makeLoader({ globals: constructor });
+  let module = Module("./main", "scratchpad://");
+  let require = Require(loader, module);
+
+  let tabs = require("sdk/tabs");
+
+  tabs.open({
+    url: "about:blank",
+    onReady: function (tab) {
+      is(tab.url, "about:blank", "correct uri for tab");
+      is(tabs.activeTab, tab, "correctly active tab");
+      tab.close(finish);
+    }
+  });
+}