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.