diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index da691749..b591d485 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -10,11 +10,16 @@ Contributions and pull requests are welcome.  Please take note of the following
 
 Contributers should install [thinca/vim-themis](https://github.com/thinca/vim-themis) to run tests before sending a PR if they applied some modification to the code. PRs which does not pass tests won't be accepted.
 
-## Installation
+## 1. Installation
 
 ```
 $ cd /path/to/vim-airline
 $ git submodule add https://github.com/thinca/vim-themis ./.themis-bin
+```
+
+## 2. running test
+
+```
 $ ./path/to/themis-bin/bin/themis path/to/vim-airline/test --reporter spec
 ```