Verified against a live OPNsense 24.7 instance: GET /api/interfaces/overview/export returns a bare list of interface dicts keyed by "device" with CIDR "addr4"/"addr6" strings, matching what get_interfaces_ip() already parses. The fixture's "items"/"interface"/ "address"/"prefix" shape never matched, so all four TestGetInterfacesIp tests failed regardless of driver correctness.