diff --git a/qsimcirq_tests/qsimcirq_test.py b/qsimcirq_tests/qsimcirq_test.py
index 66c41b559..eb63dc4d6 100644
--- a/qsimcirq_tests/qsimcirq_test.py
+++ b/qsimcirq_tests/qsimcirq_test.py
@@ -1045,7 +1045,7 @@ def steps(self):
         return [m for _, m in self._prob_op_pairs]
 
     def __str__(self):
-        return f"NoiseChannel({self._ops})"
+        return f"NoiseChannel({self._prob_op_pairs})"
 
     def __repr__(self):
         return str(self)