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-rw-r--r--Lib/test/test_bufio.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/test/test_bufio.py b/Lib/test/test_bufio.py
index dc9a82dc635..cb9cb4d0bc7 100644
--- a/Lib/test/test_bufio.py
+++ b/Lib/test/test_bufio.py
@@ -28,7 +28,7 @@ class BufferSizeTest:
f.write(b"\n")
f.write(s)
f.close()
- f = open(os_helper.TESTFN, "rb")
+ f = self.open(os_helper.TESTFN, "rb")
line = f.readline()
self.assertEqual(line, s + b"\n")
line = f.readline()