diff --git a/napalm_sonos/sonos_driver.py b/napalm_sonos/sonos_driver.py
index 160e09f..dbf7992 100644
--- a/napalm_sonos/sonos_driver.py
+++ b/napalm_sonos/sonos_driver.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import logging
 import socket
 from typing import Any
 
@@ -13,6 +14,8 @@ SoCo library, exposing NAPALM standard methods alongside Sonos-specific
 media-playback controls.
 """
 
+logger = logging.getLogger(__name__)
+
 
 class SonosDriver(MediaDriver):
     """NAPALM driver for controlling Sonos speakers.
@@ -33,7 +36,9 @@ class SonosDriver(MediaDriver):
         FingerprintRule("rincon", weight=5.0),
     ]
 
-    def __init__(
+    # A Sonos speaker takes no login: username and password exist only for NAPALM's
+    # constructor signature, and the empty default is no credential.
+    def __init__(  # nosec B107
         self,
         hostname: str,
         username: str = "",
@@ -60,7 +65,7 @@ class SonosDriver(MediaDriver):
             self._speaker_info = self._device.get_speaker_info()
         except Exception as e:
             # Broad catch: SoCo can raise a variety of transport/XML errors
-            raise ConnectionException(f"Cannot connect to Sonos at {self.hostname}: {e}")
+            raise ConnectionException(f"Cannot connect to Sonos at {self.hostname}: {e}") from e
 
     def close(self) -> None:
         """Close the connection to the Sonos speaker."""
@@ -112,7 +117,7 @@ class SonosDriver(MediaDriver):
                 return wifimode in ("0", "", None)
         except Exception:
             # Broad catch: SoCo device_properties may fail for many reasons
-            pass
+            logger.debug("Sonos device properties: ignored", exc_info=True)
         return False
 
     def get_interfaces(self) -> dict[str, dict[str, Any]]:
diff --git a/tests/test_sonos.py b/tests/test_sonos.py
index f3106b8..35ba906 100644
--- a/tests/test_sonos.py
+++ b/tests/test_sonos.py
@@ -52,7 +52,7 @@ class TestSonosDriver:
             mock_soco.side_effect = Exception("Connection refused")
             try:
                 driver.open()
-                assert False, "Expected ConnectionException"
+                raise AssertionError("Expected ConnectionException")
             except ConnectionException:
                 pass