README.md in browser_shooter-0.3.11 vs README.md in browser_shooter-0.3.13

@@ -152,9 +152,32 @@
 
     log "myarg1", "myarg2"
 
 You can check the [custom extensions](https://github.com/fguillen/BrowserShooter/tree/master/lib/browser_shooter/commands) that are already integrated in BrowserShooter.
 
+###### External test files
+
+Instead of defining all the tests in this file you can create a folder and create **a File for each Tests**.
+
+These files have to have the **_.test_ extension**.
+
+Then you use the _tests_ key on the _config.yml_ file to indicate the **path to the external test files folder**.
+
+For example, if you have this file tree:
+
+    /config.yml
+    /external_tests/test1.test
+    /external_tests/test2.test
+
+Then you have to use this configuration:
+
+    tests: "./external_tests"
+
+The path is **relative to the _config.yml_ file path**.
+
+The name of the Test will be **the name of the File**. Use it in your _suite_ definition.
+
+Check the [config with external test](https://github.com/fguillen/BrowserShooter/blob/master/examples/config_with_external_tests.yml) example.
 
 ##### Browsers section
 
 All the available browsers with the **selenium server url** and the **selenium browser type**.