diff --git a/README_ARCHITECTURE.md b/README_ARCHITECTURE.md
index c0386fe..a2fa556 100644
--- a/README_ARCHITECTURE.md
+++ b/README_ARCHITECTURE.md
@@ -77,6 +77,23 @@ src
 │   └── universal_gpc_rules.json
 └── theme       # Contains darkmode
     └── darkmode.js
+test
+├── background
+│   └── protection
+├── common
+├── content-scripts
+│   ├── injection
+│   └── registration
+├── data
+├── manifests
+│   ├── chrome
+│   └── firefox
+├── options
+│   ├── components
+│   └── views
+├── popup
+├── rules
+└── theme
 ```
 
 The following source folders have detailed descriptions further in the document.