diff --git a/README.md b/README.md
index 982dd7c..fb9286e 100644
--- a/README.md
+++ b/README.md
@@ -129,5 +129,8 @@ The app owns WCSession activation and handling incoming updates.
 - iOS 17+
 - watchOS 10+
 
+## Testing
+- Unit tests use Swift Testing (`Testing` package)
+
 ## Sample App
 See `SecureStorgageSample` for working examples of all storage domains and security options.