diff --git a/tests/tools/test_voice_thinking_sound.py b/tests/tools/test_voice_thinking_sound.py
index 57d32418ab8da..5a21b3f89aa7b 100644
--- a/tests/tools/test_voice_thinking_sound.py
+++ b/tests/tools/test_voice_thinking_sound.py
@@ -16,7 +16,11 @@ import threading
 import time
 from unittest.mock import patch
 
-import numpy as np
+import pytest
+
+np = pytest.importorskip(
+    "numpy", reason="numpy is a lazy voice dependency, absent in hermetic CI"
+)
 
 import tools.voice_mode as vm