> For the complete documentation index, see [llms.txt](https://cover-docs.diffblue.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cover-docs.diffblue.com/updates-and-upgrades/release-archive/2026-07-01.md).

# 2026-07-01

This release adds support for IntelliJ IDEA 2026.2. Thanks to the open-ended IntelliJ IDEA version support introduced in 2026.05.01, existing plugin installations already work with IntelliJ IDEA 2026.2 without needing to upgrade Cover. This release also retires the Community Support Forum.

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## Important Notices

* **Retirement of the Community Support Forum:** The Diffblue Community Support Forum has been decommissioned. The plugin no longer includes a 'Community Support Forum' menu item, and references to the forum have been removed. For help, see the [Diffblue Docs](https://docs.diffblue.com) or the [Diffblue Support page](https://www.diffblue.com/support).
* **Deprecation of Docker Hub distribution for Cover CLI:** Diffblue Cover images are no longer published to Docker Hub. Users who previously pulled the `diffblue/cover-cli` image from Docker Hub will no longer receive new tags there and should obtain Cover CLI through the standard release channels.

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## Enhancements

* Plugin: Diffblue Cover now supports IntelliJ IDEA 2026.2. Existing plugin installations already work with IntelliJ IDEA 2026.2 due to the open-ended version support introduced in 2026.05.01. \[Ref: TG-24169]

## Resolved Issues

* Upgraded Bouncy Castle to address security vulnerability CVE-2025-14813.

## Known Issues

* Plugin: Diffblue Cover incorrectly displays a menu option to write tests for existing test files. \[Ref: TG-17163]
* Using JDKs other than the supported Open JDK and Oracle JDK may produce unexpected results due to implementation differences. \[Ref: TG-19345]
* Cover may encounter an `F009` (Internal error) caused by a `ClassCircularityError` involving `org/mockito/configuration/MockitoConfiguration` when writing tests with Mockito 5. The recommended workaround is to downgrade to Mockito 4.x. \[Ref: TG-19610]
* Reports: The total line count metric in Reports only includes Java code. Kotlin code is not included. \[Ref: TG-22088]
* Reports: Total lines of code metric can incorrectly count a multi-line comment at the end of a line of code, resulting in fewer than expected lines counted. \[Ref: TG-22089]
* Reports: Following an upgrade, the 'Total Lines of Code' card may show 0 until a new reports bundle has been uploaded. \[Ref: TG-22094]
* Cover may write more simplistic tests with less meaningful assertions when Spring Boot dependency injection is disabled. \[Ref: TG-22102]
* In some circumstances, Cover will still write Spring Boot tests when Spring Boot dependency injection is disabled. \[Ref: TG-22103]
* Cover may write failing TestNG tests when Spring Boot dependency injection is disabled. \[Ref: TG-22107]
* Plugin: On some displays, the Test Review subsection title 'Tests for review' is malformed. \[Ref: TG-22805]
* When test formatting settings are changed, the Test Review feature may incorrectly remove the `@ManagedByDiffblue` annotation from tests, particularly in cases involving static import formatting changes. \[Ref: TG-23750]
* Plugin: Using the Test Review feature may create tests that have incompatible dependency injection systems. \[Ref: TG-23935]
* CLI: In rare circumstances, Cover may remove existing tests when using merge mode (`--merge`). The recommended workaround is to use the `@WriteTestsTo` annotation to specify a separate test class. \[Ref: TG-24166]
* Plugin: When writing tests for a project that targets a JDK version newer than IntelliJ's runtime JDK (e.g., Java 25 with IntelliJ's bundled Java 21), generated tests may not match the project's non-default formatting style and will instead use default IntelliJ formatting. \[Ref: TG-24168]