diff --git a/src/tests/test_ai_tui_agent_harness.py b/src/tests/test_ai_tui_agent_harness.py
index ed228a38..c01b4c26 100644
--- a/src/tests/test_ai_tui_agent_harness.py
+++ b/src/tests/test_ai_tui_agent_harness.py
@@ -6,6 +6,8 @@ import sys
 
 import pytest
 
+pytest.importorskip("pty")
+
 
 def _load_harness_module():
     repo_root = Path(__file__).resolve().parents[2]