Introduction

MSTest is a testing framework provided by Microsoft for running automated tests on .NET applications. `mstest.exe` is the command-line tool used to execute these tests. Finding the location of `mstest.exe` is a common task when configuring build servers or setting up development environments. This article will provide a comprehensive guide on where to find `mstest.exe` and how to utilize it effectively.

Locating `mstest.exe`

The location of `mstest.exe` can vary depending on the version of Visual Studio and the .NET framework installed on your system. Let's explore the typical installation paths.

Installation Paths

Visual Studio 2019 and Earlier

For versions of Visual Studio 2019 and earlier, `mstest.exe` is part of the Visual Studio setup. The executable is located in the Team Test Agent or different editions of Visual Studio (Enterprise, Professional, Community). The typical path is:

• `C:\Program Files (x86)\Microsoft Visual Studio``<Version>````<Edition>``\Common7\IDE\MSTest.exe`

For example:

• Visual Studio 2019 Enterprise:
  `C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\MSTest.exe`

Visual Studio 2022 and Later

Starting with Visual Studio 2022, the availability and location of `mstest.exe` may differ due to changes in the architecture, as Visual Studio now supports 64-bit installations. It is generally found at:

• `C:\Program Files\Microsoft Visual Studio\2022``<Edition>``\Common7\IDE\MSTest.exe`

Visual Studio Build Tools

If you've installed Visual Studio Build Tools instead of the full Visual Studio IDE, you might find `mstest.exe` in a path similar to:

• `C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\Common7\IDE\MSTest.exe`

Command Line Interface (CLI) Tools

For developers who use the .NET Core CLI tools, MSTest can be used with `dotnet test` command. While this approach does not require `mstest.exe`, understanding where the executable resides is crucial for interfacing with legacy systems.

How to Use `mstest.exe`

Once you have located `mstest.exe`, you can start executing your test suites from the command line.

Basic Command:

To execute tests using `mstest.exe`, open a command prompt and navigate to the directory containing your `.testsettings` or `.runsettings` file. Then use the following command:

• `/testcontainer`: Points to the DLL or EXE file that contains the tests.
• `/resultsfile`: Specifies the output file for test results.
• `/test`: Executes a particular test.