diff --git a/benchmark/benchmark.py b/benchmark/benchmark.py
index 3cfbe104d..bf09bafef 100755
--- a/benchmark/benchmark.py
+++ b/benchmark/benchmark.py
@@ -784,7 +784,7 @@ def run_test_real(
     instructions += prompts.instructions_addendum.format(file_list=file_list)
 
     io = InputOutput(
-        pretty=True,
+        pretty=False,
         yes=True,
         chat_history_file=history_fname,
     )