go/src/netstack/tests/meta/netstack_loopback_test.cmx

{
    "program": {
        "binary": "test/netstack_loopback_test"
    },
    "sandbox": {
        "services" : [
            "fuchsia.net.SocketProvider"
        ]
    },
    "facets": {
        "fuchsia.test": {
            "system-services": [
                "fuchsia.net.SocketProvider"
            ]
        }
    }
}