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diff --git a/tests/test_protocol.py b/tests/test_protocol.py
index 7c2099b..b902725 100644
--- a/tests/test_protocol.py
+++ b/tests/test_protocol.py
@@ -1,9 +1,11 @@
 import sys
 import unittest
+from pathlib import Path
 
 import numpy as np
 
-sys.path.insert(0, "/home/program/NextAgent/src")
+# 仅依赖本仓库布局：tests/ 的上一级的 src/，不引用仓库外任何绝对路径
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent / "src"))
 
 from protocol.registry import PROTOCOL_REGISTRY, FMT_NAMES, PARSER_NAMES
 from protocol.codec import CodecAdapter, IdentityCodec, EncodingError, DecodingError