diff --git a/tensorflow_probability/python/internal/hypothesis_testlib.py b/tensorflow_probability/python/internal/hypothesis_testlib.py
index <HASH>..<HASH> 100644
--- a/tensorflow_probability/python/internal/hypothesis_testlib.py
+++ b/tensorflow_probability/python/internal/hypothesis_testlib.py
@@ -668,7 +668,7 @@ def no_tf_rank_errors():
   input_dims_pat = r'Unhandled input dimensions (8|9|[1-9][0-9]+)'
   input_rank_pat = r'inputs rank not in \[0,([6-9]|[1-9][0-9]+)\]'
   cwise_op_names = (r'Op:(AddV2|Sub|Mul|SquaredDifference|RealDiv|BroadcastTo|'
-                    r'LessEqual)')
+                    r'LessEqual|MulNoNan)')
   cwise_pat_1 = _rank_broadcasting_error_pattern(5, 6, cwise_op_names)
   cwise_pat_2 = _rank_broadcasting_error_pattern(6, 5, cwise_op_names)
   pat_1 = _rank_broadcasting_error_pattern(8, 9)
Blacklist another TF op that Hypothesis has figured out how to tickle with rank-6 broadcasting.

PiperOrigin-RevId: <I>