diff --git a/tests/test_config.py b/tests/test_config.py
index 78c58c9..4dcf7b4 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -16,6 +16,15 @@ def test_load_default_config(tmp_path):
     assert "Réponds directement" in cfg.system_prompt
 
 
+def test_timeout_zero_disables_timeout(tmp_path):
+    path = tmp_path / "config.json"
+    path.write_text(json.dumps({"provider": "ollama", "request_timeout_seconds": 0}), encoding="utf-8")
+
+    cfg = load_config(path)
+
+    assert cfg.request_timeout_seconds is None
+
+
 def test_reject_invalid_provider(tmp_path):
     path = tmp_path / "config.json"
     path.write_text(json.dumps({"provider": "bad"}), encoding="utf-8")