diff --git a/CMakeLists.txt b/CMakeLists.txt
index b3791c3..6d97f0b 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -58,8 +58,10 @@ endif()
 add_subdirectory(src)
 
 # tests
-add_test("utilTest" utilTest)
-add_test("spatialjoinTest" spatialjoinTest)
+if(PROJECT_IS_TOP_LEVEL)
+  add_test("utilTest" utilTest)
+  add_test("spatialjoinTest" spatialjoinTest)
+endif()
 
 # install target
 install(