#15676: mmap: add empty file check prior to offset check <- Previous patch was incomplete
diff --git a/Lib/test/test_mmap.py b/Lib/test/test_mmap.py
index c060e61..28b52a9 100644
--- a/Lib/test/test_mmap.py
+++ b/Lib/test/test_mmap.py
@@ -462,11 +462,11 @@
     def test_empty_file (self):
         f = open (TESTFN, 'w+b')
         f.close()
-        f = open(TESTFN, "rb")
-        self.assertRaisesRegex(ValueError,
-                               "cannot mmap an empty file",
-                               mmap.mmap, f.fileno(), 0, access=mmap.ACCESS_READ)
-        f.close()
+        with open(TESTFN, "rb") as f :
+            self.assertRaisesRegex(ValueError,
+                                   "cannot mmap an empty file",
+                                   mmap.mmap, f.fileno(), 0,
+                                   access=mmap.ACCESS_READ)
 
     def test_offset (self):
         f = open (TESTFN, 'w+b')