diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index e01e83d..f58718e 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -6,7 +6,7 @@ if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/unittest-cpp/tests)
     execute_process(COMMAND git submodule update --init WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}")
 endif()
 
-add_subdirectory(unittest-cpp)
+add_subdirectory(unittest-cpp EXCLUDE_FROM_ALL)
 
 include_directories(
     ../include