diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index f3b33f23808..a7bb95b243d 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -449,7 +449,7 @@ class UnseekableWriter(self.MockUnseekableIO):
                 else:
                     self.assertRaises(OSError, obj.write, data)
 
-                if sys.platform.startswith("win") or test in (
+                if sys.platform.startswith("win") and test in (
                         pipe_reader, pipe_writer):
                     # Pipes seem to appear as seekable on Windows
                     continue