diff --git a/codex-rs/core/tests/common/lib.rs b/codex-rs/core/tests/common/lib.rs
index a98db4d0f1..500c595545 100644
--- a/codex-rs/core/tests/common/lib.rs
+++ b/codex-rs/core/tests/common/lib.rs
@@ -28,9 +28,10 @@ pub fn load_default_config_for_test(codex_home: &TempDir) -> Config {
 
 #[cfg(target_os = "linux")]
 fn default_test_overrides() -> ConfigOverrides {
-    let mut overrides = ConfigOverrides::default();
-    overrides.codex_linux_sandbox_exe = Some(cargo_bin("codex-linux-sandbox"));
-    overrides
+    ConfigOverrides {
+        codex_linux_sandbox_exe: Some(cargo_bin("codex-linux-sandbox")),
+        ..ConfigOverrides::default()
+    }
 }
 
 #[cfg(not(target_os = "linux"))]