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-rw-r--r--Lib/test/test_io.py3
1 files changed, 1 insertions, 2 deletions
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 23eb3b3..455a87b 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -2896,8 +2896,7 @@ class TextIOWrapperTest(unittest.TestCase):
# try to get a user preferred encoding different than the current
# locale encoding to check that TextIOWrapper() uses the current
# locale encoding and not the user preferred encoding
- for key in ('LC_ALL', 'LANG', 'LC_CTYPE'):
- env.unset(key)
+ env.unset('LC_ALL', 'LANG', 'LC_CTYPE')
current_locale_encoding = locale.getencoding()
b = self.BytesIO()