diff --git a/tests/test_factor_rules.py b/tests/test_factor_rules.py
index 471b03b3..0ff7ad88 100644
--- a/tests/test_factor_rules.py
+++ b/tests/test_factor_rules.py
@@ -309,6 +309,15 @@ class FactorRulesPathTests(unittest.TestCase):
 
         self.assertIn("- Conditions: {'threshold': 5}", summary)
 
+    def test_summarize_factor_rules_stringifies_tuple_conditions(self):
+        summary = summarize_factor_rules(
+            [{"name": "Carry", "signal": "neutral", "conditions": [("threshold", 5)]}],
+            ticker="LQD",
+            trade_date="2026-03-07",
+        )
+
+        self.assertIn("- Conditions: ('threshold', 5)", summary)
+
 
 if __name__ == "__main__":
     unittest.main()