Installation and Setup

This topic outlines the steps required to install Telerik® JustMock.

System Requirements

JustMock supports the following operating systems:

  • Windows 10
  • Windows 8.1
  • Windows 8
  • Windows 7
  • Windows Vista
  • Windows Server 2008
  • Windows Server 2003
  • Windows XP

Development Environment

In order to use JustMock the following additional development tools must be installed beforehand:

  • .NET Framework .NET 4.5+, .NET 4.6+, .NET 4.7+
  • Microsoft Visual Studio 2010/2012/2013/2015/2017/2019 - download from here.

Since R1 2019, .NET Core 2 and later versions are also supported.

Installing JustMock

  1. Download the JustMock installer from

    • If this is your first time here and you want to try JustMock, download the trial installer file from here.
    • If you are a licensed JustMock user, log in your Telerik account and navigate to the Downloads section.
  2. Run the installer and follow the steps. Configure the default installation folder. Installer

  3. You are all set.

If you encounter issues during the installation process, submit a support ticket in our support ticketing system with as much details as possible and we will assist you.

Using JustMock

To start using JustMock in your test projects, add a reference to the Telerik.JustMock.dll (or Telerik.JustMock.Silverlight.dll if you use it in a Silverlight project). The assembly is located in the installation directory under the Libraries folder (by default C:\Program Files (x86)\Progress\Telerik JustMock\Libraries). Alternatively, use the Visual Studio Extension.

Integrating JustMock in TFS Code Activity Workflow

Please follow these articles for detailed steps, describing the JustMock integration with TFS 2010, TFS 2012 or TFS 2013.

In case your test runner is being executed under one of these accounts:


To mock non-virtual/static methods on TFS you might have to perform manual configuration by setting up the following system environment variables:

  • COR_PROFILER={B7ABE522-A68F-44F2-925B-81E7488E9EC0}

This will enable JustMock profiler for all managed processes on your build/test server.

Enabling JustMock profiler on global scale could slow down the execution of all managed processes.

We strongly recommend configuring your test runner to execute under a dedicated account and setup the environment variables for that account only. With such configuration other managed applications won’t be affected by JustMock profiler.

Resources and Documentation

After installing JustMock, you can find a Getting Started Guide and example projects in the installation directory (by default C:\Program Files (x86)\Progress\Telerik JustMock).

The example projects provide a hands-on approach, unit testing JustMock itself. The documentation is also available in Help3 format shipped separately in a ZIP file which you can download from your Telerik account.

If you need additional assistance, take a look at our online JustMock forums or contact support.

See Also

In this article
Not finding the help you need? Improve this article