diff --git a/CMakeLists.txt b/CMakeLists.txt
index a199a9a..5ac11ec 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -267,6 +267,7 @@ install(EXPORT AthenaTargets DESTINATION ${INSTALL_CMAKE_DIR} COMPONENT athena)
 ################
 
 add_subdirectory(atdna)
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
 # Test target
 add_executable(atdna-test atdna/test.cpp atdna/test.hpp)
 target_atdna(atdna-test atdna_test.cpp atdna/test.hpp)
@@ -276,6 +277,7 @@ if (CMAKE_SYSTEM_NAME STREQUAL "Switch")
 else()
     target_link_libraries(atdna-test athena-core)
 endif()
+endif()
 
 #########
 # CPack #
diff --git a/atdna/CMakeLists.txt b/atdna/CMakeLists.txt
index 085bb9f..e67272c 100644
--- a/atdna/CMakeLists.txt
+++ b/atdna/CMakeLists.txt
@@ -192,9 +192,11 @@ install(EXPORT atdnaTargets DESTINATION ${INSTALL_CMAKE_DIR} COMPONENT atdna)
 # CTest #
 #########
 
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
 enable_testing()
 add_test(NAME test-dna COMMAND $<TARGET_FILE:atdna> -o test.cpp
          "-I${ATHENA_INCLUDE_DIR}" ${CMAKE_SOURCE_DIR}/test.hpp)
+endif()
 
 endif()