diff --git a/tests/test_main.py b/tests/test_main.py
index 4c06c7968..5c876684a 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -1,7 +1,6 @@
 import os
 import sys
 import tempfile
-from contextlib import redirect_stdin
 from unittest import TestCase
 from aider.main import main
 
@@ -10,5 +9,5 @@ class TestMain(TestCase):
         with tempfile.TemporaryDirectory() as temp_dir:
             os.chdir(temp_dir)
     with open(os.devnull, 'r') as dev_null:
-        with redirect_stdin(dev_null):
-                    main()
+        sys.stdin.close()
+        main()