diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 5a7617c..8c91ad2 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -3720,6 +3720,7 @@
             import sys
             import time
             import threading
+            from test.support import SuppressCrashReport
 
             file = sys.{stream_name}
 
@@ -3728,6 +3729,10 @@
                     file.write('.')
                     file.flush()
 
+            crash = SuppressCrashReport()
+            crash.__enter__()
+            # don't call __exit__(): the crash occurs at Python shutdown
+
             thread = threading.Thread(target=run)
             thread.daemon = True
             thread.start()