Microsoft has unveiled GitHub Copilot Testing for .NET, bringing AI-generated unit tests directly into Visual Studio Insiders. The new feature lets developers instantly create, build, and run tests with a single click, speeding up reliability and coverage. It marks a major step toward fully integrated, AI-assisted testing workflows for .NET teams.

Here’s what you need to know:

What is it?
GitHub Copilot Testing for .NET is purpose-built for generating high-quality tests, understanding your code structure and project setup to create, build, and run tests across any scope—from a single method to your entire solution.
Why use it?
It provides scalable AI-generated unit tests, deterministic and type-safe results, multi-framework support, and seamless Visual Studio integration, including automatic test recovery.
Getting started
Install the latest Visual Studio 2026 Insiders Build, ensure your C# project builds cleanly, enable Copilot Testing under Tools > Options, and make sure you have a GitHub Copilot license.
How to choose what to test
Use @test #target in Copilot Chat to generate tests, where #target can represent a member, class, file, project, solution, or #changes for your Git diff.
What you’ll get
You’ll receive a clear summary of created/updated tests, coverage changes, quality indicators, insights into testability gaps, and direct links to the generated test files for quick iteration.

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