diff --git a/codex-rs/core/src/unified_exec/mod.rs b/codex-rs/core/src/unified_exec/mod.rs
index 0d11c107c..c090346a2 100644
--- a/codex-rs/core/src/unified_exec/mod.rs
+++ b/codex-rs/core/src/unified_exec/mod.rs
@@ -444,7 +444,7 @@ mod tests {
             "pause should block the unified exec yield timeout"
         );
         assert!(
-            response.output.contains("unified-exec-done"),
+            response.truncated_output().contains("unified-exec-done"),
             "exec_command should wait for output after the pause lifts"
         );
         assert!(