diff --git a/core/unittest/CMakeLists.txt b/core/unittest/CMakeLists.txt
index 111bff640b..e6772c37b5 100644
--- a/core/unittest/CMakeLists.txt
+++ b/core/unittest/CMakeLists.txt
@@ -36,6 +36,7 @@ macro(add_core_subdir)
     add_subdirectory(file_source)
     add_subdirectory(flusher)
     add_subdirectory(input)
+    add_subdirectory(metadata)
     add_subdirectory(ebpf)
     add_subdirectory(log_pb)
     add_subdirectory(models)