---
title: Volatility
order: 4
description: "A target that fails once and passes on rerun is volatile, as opposed to a regression that started failing and stays failing. magus keeps per-target pass/fail history and a Wilson-score volatility rate to tell them apart and auto-retry the noise."
tags: [glossary, telemetry-and-health]
---

# Volatility

A target that fails once and passes on rerun is **volatile**, as opposed to a
regression that started failing and stays failing. magus keeps per-target
pass/fail history and a Wilson-score volatility rate to tell them apart and
auto-retry the noise.

## Elsewhere

Most tools call such a test flaky. magus says volatile and keeps the rate per target, so a
retry is decided from history rather than from a retry count.

## Example

```sh
magus run --no-volatility-retry test .
```

## Used in

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In the docs:

- [Volatility](../concepts/volatility.md#volatility)
- [VolatilityReport](../reference/api/insight/v1alpha1/insight.md#volatilityreport)
- [volatility](../reference/config.md#volatility)

In the code (`magus refs <name>` lists every site):

- `config.Volatility` (Go)

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## See also

- [Volatility](../concepts/volatility.md)
- [Run](run.md)