diff --git a/codex-rs/codex-api/src/files.rs b/codex-rs/codex-api/src/files.rs
index c8c2ea7d22..02b68e3a62 100644
--- a/codex-rs/codex-api/src/files.rs
+++ b/codex-rs/codex-api/src/files.rs
@@ -708,7 +708,7 @@ mod tests {
             &chatgpt_auth(),
             &format!("{}/download/file_123", server.uri()),
             &path,
-            4,
+            /*max_size_bytes*/ 4,
         )
         .await
         .expect_err("download should fail");