TelemetryPing.jsm builds a submission URL based on some of the information in the ping. We need to add test coverage for this in test_TelemetryPing.js.
This test should be added to test_TelemetrySend.js. We should also consider moving the version check from  to the newly added test.  - https://dxr.mozilla.org/mozilla-central/rev/605de27d4e7f530159842649c02075c578d7a4a5/toolkit/components/telemetry/tests/unit/test_TelemetryController.js#140