diff --git a/CMakeLists.txt b/CMakeLists.txt
index d2d2609..b380767 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -97,4 +97,8 @@ if(WHOA_TEST_STORMDLL)
 else()
     add_subdirectory(storm)
 endif()
-add_subdirectory(test)
+
+# Only build tests when standalone
+if(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
+    add_subdirectory(test)
+endif()