diff --git a/docs/testing.md b/docs/testing.md
index 7d7dc96c..3e6d1c89 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -1,7 +1,8 @@
 # Testing for Boostnote
+## e2e testing
 There is e2e tests for Boostnote written in [ava](https://github.com/avajs/ava) and [spectron](https://github.com/electron/spectron).
 
-## How to run
+### How to run
 There is a command for e2e testing bellow:
 
 ```
@@ -10,5 +11,5 @@ $ yarn run test:e2e
 
 The reason why I seperate aother test command is because of convenience of travisCI.
 
-## On travisCI
+### On travisCI
 I set e2e tests running on travisCI only master branch. If you're interested in it, please take a look at .travis.yml