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# MUnit 3.7.0 Release Notes

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

MUnit is a Mule application testing framework that enables you to build automated tests for your
integrations and APIs.

## February 3, 2026

## What’s New

- Standardized Assertion Error Mapping

  You can now catch and manage assertion failures using standard Mule on-error scopes. To better
  align with the Mule 4 error handling framework, MUnit now throws a native Mule error type,
  `MUNIT-TOOLS:ASSERTION_ERROR`, instead of the Java-based `java.lang.AssertionError` error.

## Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Application/Service</th><th>Version</th></tr></thead><tbody><tr><td><p>Maven</p></td><td><p>3.8.1 to 3.9.10</p></td></tr><tr><td><p>Mule runtime engine</p></td><td><p>4.3 and later*</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, 17, and 21</p></td></tr></tbody></table>

\* Compatibility includes support for the latest patch releases of Mule runtime 4.3 and later.

## Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>Assertion failures are no longer incorrectly categorized as critical system errors in Mule runtime 4.11 and later.</p></div></div></td><td><div><div><p>W-20874825</p></div></div></td></tr><tr><td><div><div><p>XML parsing errors in test files are now properly reported.</p></div></div></td><td><div><div><p>W-20661580</p></div></div></td></tr></tbody></table>

## See Also

- [MUnit](https://docs.mulesoft.com/munit/latest/)

- [Salesforce Help](https://help.salesforce.com)

- [MuleSoft Services](https://www.mulesoft.com/support-and-services)

- [Known Issues](https://help.salesforce.com/s/issues)