Learn what's new across releases, with details of features, enhancements, and resolved issues.
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Telerik JustMock 2026 Q4Nov 11, 2026
Features
Added support for .NET 11.
Added native ARM64 support for the CodeWeaver profiler and JustMock packages on Windows.
Introduced Mock.SetupFuture() to configure default mocking behavior for future instances of a type.
Introduced Mock.ArrangeBaseConstructor() for arranging and verifying base constructor calls.
Added support for mocking Default Interface Methods.
Added new Visual Studio project templates for xUnit and NUnit.
Removed the legacy JustMockRunner.exe and JustMockTasks build tasks.
Removed support for MbUnit and Gallio integrations.
.NET 8 and .NET 9 support is planned to be deprecated in Q1 2027. Both versions remain supported in the current release.
Visual Studio 2019 support is planned to end with the Q1 2027 release.
Fixes
Fixed an issue where profiler environment variables were not correctly injected into Microsoft.Testing.Platform test host processes.
Fixed keyboard shortcut conflicts affecting JustMock commands in Visual Studio.
Telerik JustMock 2026 Q3Aug 12, 2026
Features
Runtime License information is now displayed in Debug View.
Added an API for resetting mock arrangements and clearing invocation counters for a specific mock object.
Added support for .NET 11 Preview 7.
Fixes
Fixed an issue that prevented unit tests from running in Visual Studio Test Explorer for Microsoft.Testing.Platform-based projects when the JustMock Visual Studio extension was enabled.
Resolved an issue causing InvalidProgramException failures in certain complex test methods on .NET 9 and newer.
Telerik JustMock 2026 Q2May 20, 2026
Features
JustMock now supports Runtime-Native Async (Runtime Async V2), introduced with .NET 11 Preview 3.
Updated the JustMock Framework documentation to improve AI-generated response accuracy.
Fixes
Fixed an issue where Visual Studio 2026 code analysis features were disrupted after the 18.4 update.
Resolved a "Read out of bounds" debugger exception that occurred during active profiling sessions with JustMock. The fix is available in the latest JetBrains version, see RIDER-138867.