diff --git a/guides/source/plugins.md b/guides/source/plugins.md
index 9d5bef91a94b12efcafe311093c101b7022465cd..1291805552dd869e37d17ed5074c7de44eb1d25f 100644
--- a/guides/source/plugins.md
+++ b/guides/source/plugins.md
@@ -390,7 +390,7 @@ class ActsAsYaffleTest < ActiveSupport::TestCase
 end
 ```
 
-Run the test to make sure the last two tests fail with an error that contains "NoMethodError: undefined method `squawk'",
+Run the test to make sure the last two tests fail with an error that contains "NoMethodError: undefined method \`squawk'",
 then update `acts_as_yaffle.rb` to look like this:
 
 ```ruby