diff --git a/README.md b/README.md
index d53930b5b1..44a1584755 100644
--- a/README.md
+++ b/README.md
@@ -16,37 +16,36 @@ DIRECTORY STRUCTURE
 
 ```
 common
-	config/				contains shared configurations
-	mail/				contains view files for e-mails
-	models/				contains model classes used in both backend and frontend
-	tests/				contains various tests for objects that are common among applications
+    config/              contains shared configurations
+    mail/                contains view files for e-mails
+    models/              contains model classes used in both backend and frontend
 console
-	config/				contains console configurations
-	controllers/		contains console controllers (commands)
-	migrations/			contains database migrations
-	models/				contains console-specific model classes
-	runtime/			contains files generated during runtime
-	tests/				contains various tests for the console application
+    config/              contains console configurations
+    controllers/         contains console controllers (commands)
+    migrations/          contains database migrations
+    models/              contains console-specific model classes
+    runtime/             contains files generated during runtime
 backend
-	assets/				contains application assets such as JavaScript and CSS
-	config/				contains backend configurations
-	controllers/		contains Web controller classes
-	models/				contains backend-specific model classes
-	runtime/			contains files generated during runtime
-	tests/				contains various tests for the backend application
-	views/				contains view files for the Web application
-	web/				contains the entry script and Web resources
+    assets/              contains application assets such as JavaScript and CSS
+    config/              contains backend configurations
+    controllers/         contains Web controller classes
+    models/              contains backend-specific model classes
+    runtime/             contains files generated during runtime
+    views/               contains view files for the Web application
+    web/                 contains the entry script and Web resources
 frontend
-	assets/				contains application assets such as JavaScript and CSS
-	config/				contains frontend configurations
-	controllers/		contains Web controller classes
-	models/				contains frontend-specific model classes
-	runtime/			contains files generated during runtime
-	tests/				contains various tests for the frontend application
-	views/				contains view files for the Web application
-	web/				contains the entry script and Web resources
-vendor/					contains dependent 3rd-party packages
-environments/			contains environment-based overrides
+    assets/              contains application assets such as JavaScript and CSS
+    config/              contains frontend configurations
+    controllers/         contains Web controller classes
+    models/              contains frontend-specific model classes
+    runtime/             contains files generated during runtime
+    views/               contains view files for the Web application
+    web/                 contains the entry script and Web resources
+    widgets/             contains frontend widgets
+vendor/                  contains dependent 3rd-party packages
+environments/            contains environment-based overrides
+tests                    contains various tests for the advanced application
+    codeception/         contains tests developed with Codeception PHP Testing Framework
 ```