diff --git a/tests/install/CMakeLists.txt b/tests/install/CMakeLists.txt
index f9d7de7..f7502e5 100644
--- a/tests/install/CMakeLists.txt
+++ b/tests/install/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.22)
-project(rsl-install-test)
+project(rsl-install-test CXX)
 
 if(PROJECT_IS_TOP_LEVEL)
     # Test consumption via find_package interface and ament_target_dependencies