diff --git a/Chapters/06_Failure.md b/Chapters/06_Failure.md
index 4e0333e7..0fa8a10b 100644
--- a/Chapters/06_Failure.md
+++ b/Chapters/06_Failure.md
@@ -404,7 +404,7 @@ def run =
 The new `temperatureAppComplete` cannot fail because there are no failures to catch.
 If you try to catch failures from `temperatureAppComplete` by running the following, you will get a compiler error that is noisier than we want to show in the book:
 
-```scala 3
+```scala 3 mdoc:fail
 def compilerError =
     temperatureAppComplete.catchAll:
       case ex: GpsException =>