Add test case for '..'
diff --git a/README-extensions.rst b/README-extensions.rst
index 6693256..22991c4 100644
--- a/README-extensions.rst
+++ b/README-extensions.rst
@@ -340,7 +340,7 @@
 --------------------------------
 
 Load referenced class from a relative location to the current class.
-To load class from relative location start the class uri with "." char.
+To load class from relative location start the class uri with "." or ".." char.
 The only supported reference is to nested tree structure below the current class.
 
 You are allowed to use syntax for relative uri to required class on any place on your model (first class loaded, init.yml, regular class .yml).
@@ -350,7 +350,7 @@
 It's a new feature use it with care and mind that using "relative syntax" lower traceability of
 your pillar composition.
 
-Example usage of relative class name:
+Example usage of relative class name using '.' and '..':
 
 .. code-block:: yaml
 
@@ -366,6 +366,12 @@
   classes:
     - .defaults
 
+.. code-block:: yaml
+
+  #/etc/reclass/classes/component/configuration/init.yml
+  classes:
+    - ..defaults
+
 
 Inventory Queries
 -----------------