diff --git a/Testing.md b/Testing.md
index 4ed71de..5e0ce2a 100644
--- a/Testing.md
+++ b/Testing.md
@@ -1,3 +1,20 @@
+# Automated Unit Tests
+
+`Terminal.Gui` uses [xunit](https://xunit.net/) for automated unit tests run automatically with Github Actions.
+
+## Notes
+
+* Running tests in parallel is disabled because `Application` is a singleton. Do not change those settings.
+
+## Guidelines for Adding More Tests
+
+1. Do. Please. Add lots.
+2. Structure the tests by class. Name the test classes in the form of `ClassNameTests` and the file `ClassNameTests.cs`.
+3. The test functions themselves should have descriptive names like `TestBeginEnd`.
+4. IMPORTANT: Remember `Application` is a static class (singleton). You must clean up after your tests by calling `Application.Shutdown`.
+
+See the README.md in `UnitTests/` for details on how xunit is configured.
+
 ## Standard Regression Tests required before submitting a Pull Request
 
 - Ensure a UI Catalog Scenario has been developed that *specifically* exercises the code involved in the PR. This Scenario should explicitly and intentionally exercise the following common functional areas: