README.md in timetree-0.1.4 vs README.md in timetree-0.1.5

- old
+ new

@@ -1,6 +1,7 @@
 # Simple TimeTree APIs client
 
+[![Test](https://github.com/koshilife/timetree-api-ruby-client/workflows/Test/badge.svg)](https://github.com/koshilife/timetree-api-ruby-client/actions?query=workflow%3ATest)
 [![Gem Version](https://badge.fury.io/rb/timetree.svg)](http://badge.fury.io/rb/timetree)
 
 ## About
 
 These client libraries are created for [TimeTree APIs](https://developers.timetreeapp.com/en).