diff --git a/docs/doc/usage.rst b/docs/doc/usage.rst
index 7d4cb35..ba398db 100644
--- a/docs/doc/usage.rst
+++ b/docs/doc/usage.rst
@@ -24,7 +24,7 @@ To merge dictionaries, you can use the ``merge_dicts.merge_dicts()`` function:
 
 For example:
 
-.. testcode::
+.. code-block:: python
 
    import merge_dicts
    print(merge_dicts.merge_dicts())