You can run a single test, a set of tests or all tests. Tests can be run on different browsers. By default tests are run in a headless manner meaning no browser window will be opened while running the tests and results will be seen in the terminal. If you prefer you can run your tests in headed mode by using the `headless` test run parameter.
To run your test on multiple browsers or configurations you need to invoke the `dotnet test` command multiple times. There you can then either specify the `BROWSER` environment variable or set the `Playwright.BrowserName` via the runsettings file:
For more information see [selective unit tests](https://docs.microsoft.com/en-us/dotnet/core/testing/selective-unit-tests?pivots=mstest) in the Microsoft docs.
Since Playwright runs in .NET, you can debug it with your debugger of choice in e.g. Visual Studio Code or Visual Studio. Playwright comes with the Playwright Inspector which allows you to step through Playwright API calls, see their debug logs and explore [locators](./locators.md).
Check out our [debugging guide](./debug.md) to learn more about the [Playwright Inspector](./debug.md#playwright-inspector) as well as debugging with [Browser Developer tools](./debug.md#browser-developer-tools).