diff --git a/test/test_meshcore_path_hashes.py b/test/test_meshcore_path_hashes.py
new file mode 100644
index 0000000..452b335
--- /dev/null
+++ b/test/test_meshcore_path_hashes.py
@@ -0,0 +1,28 @@
+"""Unit tests for MeshCore path hash splitting (_path_hashes)."""
+
+from src.meshcore.serializers import _path_hashes
+
+
+def test_path_hashes_two_byte_default():
+    payload = {"path": "f3bcf1a2b3c4", "path_hash_size": 2}
+    assert _path_hashes(payload) == ["f3bc", "f1a2", "b3c4"]
+
+
+def test_path_hashes_one_byte():
+    payload = {"path": "aabbcc", "path_hash_size": 1}
+    assert _path_hashes(payload) == ["aa", "bb", "cc"]
+
+
+def test_path_hashes_three_byte():
+    payload = {"path": "aabbccddeeff", "path_hash_size": 3}
+    assert _path_hashes(payload) == ["aabbcc", "ddeeff"]
+
+
+def test_path_hashes_missing_path_returns_none():
+    assert _path_hashes({"path_len": 2}) is None
+    assert _path_hashes({}) is None
+
+
+def test_path_hashes_list_passthrough():
+    payload = {"path": ["aa", "bb"]}
+    assert _path_hashes(payload) == ["aa", "bb"]