diff --git a/codex-rs/tui/Cargo.toml b/codex-rs/tui/Cargo.toml
index be4f5aead7..6428ab248e 100644
--- a/codex-rs/tui/Cargo.toml
+++ b/codex-rs/tui/Cargo.toml
@@ -76,6 +76,7 @@ tokio = { workspace = true, features = [
     "io-std",
     "macros",
     "process",
+    "test-util",
     "rt-multi-thread",
     "signal",
 ] }