diff --git a/cli/src/native/actions.rs b/cli/src/native/actions.rs
index 8f04acc..4d6d13b 100644
--- a/cli/src/native/actions.rs
+++ b/cli/src/native/actions.rs
@@ -5267,6 +5267,7 @@ mod tests {
 
     #[test]
     fn test_launch_options_from_env_defaults() {
+        let _guard = EnvGuard::new(&["AGENT_BROWSER_HEADED"]);
         let opts = launch_options_from_env();
         assert!(opts.headless);
         assert!(opts.args.is_empty());