silence open file warnings in python 3

1 files changed, 4 insertions, 3 deletions

diff --git a/test.py b/test.py
index 3d922cd..f9c9c41 100644
--- a/test.py
+++ b/test.py
@@ -13,9 +13,10 @@ class MagicTest(unittest.TestCase):
             except TypeError:
                 filename = os.path.join(self.TESTDATA_DIR.encode('utf-8'), filename)
 
-            value = m.from_buffer(open(filename, 'rb').read())
-            expected_value_bytes = expected_value.encode('utf-8')
-            self.assertEqual(value, expected_value_bytes)
+            with open(filename, 'rb') as f:
+                value = m.from_buffer(f.read())
+                expected_value_bytes = expected_value.encode('utf-8')
+                self.assertEqual(value, expected_value_bytes)
 
             value = m.from_file(filename)
             self.assertEqual(value, expected_value_bytes)