Telerik JustMock The Fastest, Most Flexible and
Complete Mocking Solution for Crafting Unit Tests

Loved by .NET Developers. Support .NET 5 & .NET Core


Telerik Earns Multiple TrustRadius Best of Development 2021 awards

Telerik has won Best Feature Set and Best Customer Support. The award is based on both quantitative and qualitative feedback provided in user reviews with regards to customer support, feature set and usability.

Why Choose JustMock

What's Included

  1. Mock Everything

    • Interfaces
    • Virtual and abstract methods and properties
    • LINQ queries
    • Sealed classes
    • Static classes, methods, and properties
    • Non-virtual methods and properties
    • Non-public members and types
    • Delegates
    • Generics
    • MsCorLib members
    • DLL imports
    • Threadpool
    • Extension methods
    • Ref return values and ref locals
    • Local functions 
    • Named parameters
    • Microsoft SharePoint
    • Microsoft Entity Framework mocking
    • Silverlight runtime mocking
    • Supported languages C#, VB and F#
  2. Mocking and Assert Functionality

    • Fluent Mocking
    • Future Mocking
    • Partial Mocking
    • Sequential Mocking
    • Recursive Mocking
    • Automocking
    • Assert occurrence
    • Assert Call Order
  3. Build Systems Integration

    • Team Foundation Server 2010-2018
    • Jenkins
    • TeamCity
    • MSBuild
    • Docker
    • Installation Free elevated mocking
    • Command line execution
  4. Integrate With Testing Frameworks

    • MSTest
    • MSTest 2
    • NUnit
    • xUnit
    • MSpec
  5. Integrate With Other Tools

    • VS 2010-2019 Code Coverage
    • VS 2010-2019 InteliTrace
    • JetBrains dotCover
    • NCover
    • OpenCover
    • JetBrains dotTrace
    • PostSharp

See it in Action


Upgrade to Telerik DevCraft Complete

Be Ready for Any Project & Technology

Save up to 50% in development time by getting 1,250+ .NET and JavaScript UI components for building web, desktop and mobile apps.

Get the Best Value for Money

Enjoy mocking solution for unit testing along with 15 products for .NET and JavaScript apps development and embedded reporting while saving up to 90% from the upgrade price.

What's New

Speed and Performance Optimizations When Executing Unit Tests

We’ve optimized the speed and performance of unit test execution with the JustMock profiler.

Debug Window with Enhanced UI/UX for a Better Debugging Experience

We’ve officially shipped the Debug Window for visualizing mocked objects for a better debugging experience when writing unit tests with JustMock.

Support for .NET 5 Official

Telerik JustMock ships support for .NET 5 Official.

Support and Learning

Unit Testing
Blog Post

New FREE eBook: Unit Testing in .NET—The Complete Guide

Everything you need to know when starting a Blazor, ASP.NET Core, .NET 5, Xamarin or desktop project

Telerik JustMock
Blog Post

30 Days of TDD – Day 11 – What’s the Deal with “Mocking?”

If you’ve never done Test Driven Development or aren’t even sure what this "crazy TDD stuff” is all about than this is the series for you. Read and try!

Telerik JustMock
Blog Post

Unit Testing Blazor Components with bUnit and JustMock

In this guide to unit testing Blazor components, we'll cover everything from setting up your projects to simple unit test examples and a master-detail scenario.

Industry-Leading Support


Expert and Timely Response

The same developers who build Telerik JustMock will answer any questions you might have, even during your trial, to make sure your project always gets delivered on time.

Contact Progress Telerik support

Need Evaluation Help?

If you don't have time to evaluate Telerik JustMock, send us your project requirements. We'll evaluate your required features and let you know how we can help.

Send us your requirements


I recently dropped another leading mocking tool in favor of JustMock. I was never happy with the other tool’s syntax but I couldn’t find anything else on the market. I’ve found JustMock is a much more pleasant experience.

Brad Irby .NET Architect and author of Reengineering .NET, Reengineering .NET

When isolating methods for testing gets difficult when trying to test against legacy code or databases, JustMock really starts to set itself apart. Its features such as MsCorlib, Sealed, Static, Private method and Entity Framework mocking make the seemingly untestable, testable.

Bradley Braithwaite Software Developer, Contented Coder

I've used a series of mocking tools and I believe that the API for JustMock is the most mature that I've encountered so far. The highest praise that I can give a framework tool is to say that its semantics are readable enough that you don't think about them at all as you're reading the code, and this is true with JustMock.

Erik Dietrich Software Developer, DaedTech

Next Steps

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