If you look in [[ https://github.com/phacility/arcanist/blob/1a3afa44297f8268410797dc5195a51068ceb908/src/unit/renderer/ArcanistUnitConsoleRenderer.php#L76-L92 | `ArcanistUnitConsoleRenderer.php` ]], you can see that the renderer defaults to `' <1ms'` for time, even if no time was provided.
This would look better if it simply returned a blank string if `$seconds` is `null` or `0`, as some reporters do not have the ability to tell how many seconds a test has been running for.