Random failure of basic_client_read_non_existent

[egrimley-arm]

See https://github.com/veracruz-project/veracruz/actions/runs/5392275168/jobs/9790395726

test basic_client_read_non_existent ... Looping because result is:Err(reqwest::Error { kind: Request, url: Url { scheme: "http", cannot_be_a_base: false, username: "", password: None, host: Some(Ipv4(127.0.0.1)), port: Some(3010), path: "/foo", query: None, fragment: None }, source: hyper::Error(Connect, ConnectError("tcp connect error", Os { code: 111, kind: ConnectionRefused, message: "Connection refused" })) })