diff --git a/test/cmake_target_include_directories/CMakeLists.txt b/test/cmake_target_include_directories/CMakeLists.txt
index da738ea4..d0f3335f 100644
--- a/test/cmake_target_include_directories/CMakeLists.txt
+++ b/test/cmake_target_include_directories/CMakeLists.txt
@@ -2,6 +2,7 @@ add_test(NAME cmake_target_include_directories_configure
   COMMAND ${CMAKE_COMMAND}
     -G "${CMAKE_GENERATOR}"
     -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_BUILD_TYPE=Debug
     -Dnlohmann_json_source=${PROJECT_SOURCE_DIR}
     ${CMAKE_CURRENT_SOURCE_DIR}/project
 )