# Getting from tested to battle-tested

DevFeed: [Getting from tested to battle-tested](<https://devfeed.tech/articles/getting-from-tested-to-battle-tested-20169.md>)

Original publisher: [Read original article](<https://blog.janestreet.com/getting-from-tested-to-battle-tested/>)

Author: Doug Patti

Published: 2025-12-03T00:00:00Z

Content type: article

Language: en

Sources: [Jane Street](<https://devfeed.tech/sources/jane-street.md>)

Topics: [Testing](<https://devfeed.tech/topics/testing.md>), [Software](<https://devfeed.tech/topics/software.md>), [Availability](<https://devfeed.tech/topics/availability.md>), [incident](<https://devfeed.tech/topics/incident.md>), [aria](<https://devfeed.tech/topics/aria.md>), [systems](<https://devfeed.tech/topics/systems.md>), [Network](<https://devfeed.tech/topics/network.md>)

Tags: [automated](<https://devfeed.tech/tags/automated.md>), [availability](<https://devfeed.tech/tags/availability.md>), [development](<https://devfeed.tech/tags/development.md>), [distributed-system](<https://devfeed.tech/tags/distributed-system.md>), [high-availability](<https://devfeed.tech/tags/high-availability.md>), [incident](<https://devfeed.tech/tags/incident.md>), [latency](<https://devfeed.tech/tags/latency.md>), [low-latency](<https://devfeed.tech/tags/low-latency.md>), [software](<https://devfeed.tech/tags/software.md>), [systems](<https://devfeed.tech/tags/systems.md>), [testing](<https://devfeed.tech/tags/testing.md>), [tests](<https://devfeed.tech/tags/tests.md>)

## AI overview

The article explains how Jane Street works to make testing more effective for reliable, high-availability software. It focuses on Aria, an internal distributed low-latency message bus, and introduces Antithesis as an end-to-end automated testing platform used to uncover critical scenarios that conventional tests may miss.

## Source excerpt

Testing is an essential part of building reliable software. It's a form of documentation, a reminder of mistakes of the past, and a boost of confidence when you want to refactor. But mostly, testing is a way of showing that your code is correct and resilient. Because it's so important, we've invested a lot of effort at Jane Street to develop techniques that make tests clearer, more effective, and more pleasant to write.