diff --git a/codex-rs/app-server/tests/suite/codex_message_processor_flow.rs b/codex-rs/app-server/tests/suite/codex_message_processor_flow.rs
index d1dcefaafd..a23c0542f9 100644
--- a/codex-rs/app-server/tests/suite/codex_message_processor_flow.rs
+++ b/codex-rs/app-server/tests/suite/codex_message_processor_flow.rs
@@ -36,6 +36,9 @@ use std::path::Path;
 use tempfile::TempDir;
 use tokio::time::timeout;
 
+#[cfg(target_os = "windows")]
+const DEFAULT_READ_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(25);
+#[cfg(not(target_os = "windows"))]
 const DEFAULT_READ_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(10);
 
 #[tokio::test(flavor = "multi_thread", worker_threads = 4)]