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-rw-r--r--Lib/test/test_io.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 286ae76..d84605e 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -583,7 +583,7 @@ class IOTest(unittest.TestCase):
# On Windows and Mac OSX this test consumes large resources; It takes
# a long time to build the >2 GiB file and takes >2 GiB of disk space
# therefore the resource must be enabled to run this test.
- if sys.platform[:3] == 'win' or sys.platform == 'darwin':
+ if support.MS_WINDOWS or support.MACOS:
support.requires(
'largefile',
'test requires %s bytes and a long time to run' % self.LARGE)