diff --git a/unittests/CMakeLists.txt b/unittests/CMakeLists.txt
index 3397d798..8277191e 100644
--- a/unittests/CMakeLists.txt
+++ b/unittests/CMakeLists.txt
@@ -1,6 +1,6 @@
 enable_testing()
 
-include(${TF_3RD_PARTY_DIR}/doctest/doctest.cmake)
+include(@doctest@/lib/cmake/doctest/doctest.cmake)
 
 list(APPEND TF_UNITTESTS 
   utility 
@@ -24,7 +24,7 @@ list(APPEND TF_UNITTESTS
 foreach(unittest IN LISTS TF_UNITTESTS)
   add_executable(${unittest} ${unittest}.cpp)
   target_link_libraries(${unittest} ${PROJECT_NAME} tf::default_settings)
-  target_include_directories(${unittest} PRIVATE ${TF_3RD_PARTY_DIR}/doctest)
+  target_include_directories(${unittest} PRIVATE @doctest@/include/doctest)
   doctest_discover_tests(${unittest})
 endforeach()