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-rw-r--r--Lib/test/test_mmap.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/test/test_mmap.py b/Lib/test/test_mmap.py
index eae4157..c27b898 100644
--- a/Lib/test/test_mmap.py
+++ b/Lib/test/test_mmap.py
@@ -502,7 +502,7 @@ class MmapTests(unittest.TestCase):
def test_error(self):
self.assertTrue(issubclass(mmap.error, EnvironmentError))
- self.assertTrue("mmap.error" in str(mmap.error))
+ self.assertIn("mmap.error", str(mmap.error))
def test_io_methods(self):
data = b"0123456789"