kamailio-config-tests/scenarios/invite_peerout_stir/prefs.json.tt2

{
    "@invite-peerout-stir.scenarios.test": {
        "nat_sipping": "no",
        "stir_pub_url": "http://fake.url/pub.key",
        "stir_check": true
    },
    "peer_invite_peerout_stir_host0": {
        "concurrent_max": 1
    }
}