diff -r 000000000000 -r 6474c204b198 toolkit/components/telemetry/tests/unit/test_TelemetryPing_idle.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryPing_idle.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Check that TelemetryPing notifies correctly on idle-daily.
+
+const Cu = Components.utils;
+
+Cu.import("resource://gre/modules/Services.jsm", this);
+Cu.import("resource://gre/modules/TelemetryPing.jsm", this);
+
+function run_test() {
+  do_test_pending();
+
+  Services.obs.addObserver(function observeTelemetry() {
+    Services.obs.removeObserver(observeTelemetry, "gather-telemetry");
+    do_test_finished();
+  }, "gather-telemetry", false);
+
+  TelemetryPing.observe(null, "idle-daily", null);
+}