diff --git a/CMakeLists.txt b/CMakeLists.txt
index 41ee6d1..b42fe4e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -71,7 +71,7 @@ install(FILES
 )
 
 # Only build tests and examples if this is the top-level project
-if(PROJECT_IS_TOP_LEVEL)
+if(0)
     # Add doctest dependency for testing
     CPMAddPackage(
         NAME doctest