diff --git a/guides/source/testing.md b/guides/source/testing.md
index 61353e8e7d566..9667521f3b1a5 100644
--- a/guides/source/testing.md
+++ b/guides/source/testing.md
@@ -1815,7 +1815,7 @@ class WebNotificationsChannelTest < ActionCable::Channel::TestCase
 end
 ```
 
-See the API documentation for [`AcionCable::Channel::TestCase`](http://api.rubyonrails.org/classes/ActionCable/Channel/TestCase.html) for more information.
+See the API documentation for [`ActionCable::Channel::TestCase`](http://api.rubyonrails.org/classes/ActionCable/Channel/TestCase.html) for more information.
 
 ### Custom Assertions And Testing Broadcasts Inside Other Components