diff --git a/scripts/monitor_dbus_signals.py b/scripts/monitor_dbus_signals.py
@@ -152,7 +152,14 @@ def _make_mo():
         the result of calling Properties.GetAll on the top object for
         selected interfaces.
         """
+
         mos = _OBJECT_MANAGER.Methods.GetManagedObjects(_TOP_OBJECT, {})
+
+        mos = {
+            o: {k: v for k, v in d.items() if re.fullmatch(_INTERFACE_RE, k)}
+            for o, d in mos.items()
+        }
+
         mos[_TOP_OBJECT_PATH] = {}
 
         for interface in _TOP_OBJECT_INTERFACES: