diff --git a/codex-rs/core/src/landlock.rs b/codex-rs/core/src/landlock.rs
index bc5713b2..6e9b8de7 100644
--- a/codex-rs/core/src/landlock.rs
+++ b/codex-rs/core/src/landlock.rs
@@ -194,7 +194,14 @@ mod tests {
 
     #[tokio::test]
     async fn test_dev_null_write() {
-        run_cmd(&["bash", "-lc", "echo blah > /dev/null"], &[], 200).await;
+        run_cmd(
+            &["bash", "-lc", "echo blah > /dev/null"],
+            &[],
+            // We have seen timeouts when running this test in CI on GitHub,
+            // so we are using a generous timeout until we can diagnose further.
+            1_000,
+        )
+        .await;
     }
 
     #[tokio::test]