Visual Studio 18.3 brings GitHub Copilot Testing for .NET, an AI-powered test agent for generating and managing unit tests across your codebase.

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GitHub Copilot Testing for .NET is now generally available in Visual Studio 2026 v18.3, offering AI-powered unit test generation with automatic build, execution, and failure recovery. The release introduces free-form natural language prompting (using @Test), multiple entry points including right-click context menus and chat icebreakers, and support for generating tests at various scopes from single members to entire solutions. The agent automatically creates test projects, organizes tests according to your framework preferences, and provides coverage summaries with pass/fail insights.

GitHub Copilot Testing for .NET Brings AI-powered Unit Tests to Visual Studio 2026

Purpose-built AI for Unit Testing Copy link

More natural, free-form prompting Copy link

New entry points that meet you where you work Copy link