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-rw-r--r--Lib/test/test_io.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 929865d..32f76a6 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -3510,6 +3510,7 @@ class MiscIOTest(unittest.TestCase):
self.assertRaises(ValueError, f.readinto1, bytearray(1024))
self.assertRaises(ValueError, f.readline)
self.assertRaises(ValueError, f.readlines)
+ self.assertRaises(ValueError, f.readlines, 1)
self.assertRaises(ValueError, f.seek, 0)
self.assertRaises(ValueError, f.tell)
self.assertRaises(ValueError, f.truncate)