diff --git a/cub/CMakeLists.txt b/cub/CMakeLists.txt
index 6e66813b7bb..bfc3c762c96 100644
--- a/cub/CMakeLists.txt
+++ b/cub/CMakeLists.txt
@@ -3,6 +3,8 @@
 # 3.27.5 is the minimum for MSVC build with RDC=true.
 cmake_minimum_required(VERSION 3.15)
 
+message(FATAL_ERROR "Testing a forced failure...")
+
 # CXX is only needed for AppendOptionIfAvailable.
 project(CUB LANGUAGES NONE)