diff --git a/codex-rs/sandboxing/src/seatbelt_tests.rs b/codex-rs/sandboxing/src/seatbelt_tests.rs
index fef2da4405..189294345a 100644
--- a/codex-rs/sandboxing/src/seatbelt_tests.rs
+++ b/codex-rs/sandboxing/src/seatbelt_tests.rs
@@ -657,9 +657,11 @@ async fn create_seatbelt_args_merges_proxy_and_explicit_unix_socket_paths() -> a
     );
     let network_socket = "/tmp/codex-proxy-use";
     let explicit_socket = "/tmp/codex-browser-use";
-    let mut network_config = NetworkProxyConfig::default();
-    network_config.enabled = true;
-    network_config.mode = NetworkMode::Full;
+    let mut network_config = NetworkProxyConfig {
+        enabled: true,
+        mode: NetworkMode::Full,
+        ..Default::default()
+    };
     network_config.set_allow_unix_sockets(vec![network_socket.to_string()]);
     let state = build_config_state(network_config, NetworkProxyConstraints::default())?;
     let network_proxy = NetworkProxy::builder()