diff --git a/Lib/lib2to3/tests/test_fixers.py b/Lib/lib2to3/tests/test_fixers.py
index 3b2945c..bd0dc58 100755
--- a/Lib/lib2to3/tests/test_fixers.py
+++ b/Lib/lib2to3/tests/test_fixers.py
@@ -3139,7 +3139,7 @@
 
     def setUp(self):
         FixerTestCase.setUp(self)
-        # Need to replace fix_import's isfile and isdir method
+        # Need to replace fix_import's exists method
         # so we can check that it's doing the right thing
         self.files_checked = []
         self.always_exists = True
diff --git a/Lib/test/test_mmap.py b/Lib/test/test_mmap.py
index fdd75ab..f01b9df 100644
--- a/Lib/test/test_mmap.py
+++ b/Lib/test/test_mmap.py
@@ -158,6 +158,7 @@
             pass
         else:
             self.fail("Able to resize readonly memory map")
+        f.close()
         del m, f
         self.assertEqual(open(TESTFN, "rb").read(), b'a'*mapsize,
                "Readonly memory map data file was modified")
@@ -214,6 +215,7 @@
                "Copy-on-write test data file should not be modified.")
         # Ensuring copy-on-write maps cannot be resized
         self.assertRaises(TypeError, m.resize, 2*mapsize)
+        f.close()
         del m, f
 
         # Ensuring invalid access parameter raises exception
@@ -433,7 +435,7 @@
         f = open(TESTFN, "rb")
         m = mmap.mmap(f.fileno(), mapsize, prot=mmap.PROT_READ)
         self.assertRaises(TypeError, m.write, "foo")
-
+        f.close()
 
     def test_error(self):
         self.assert_(issubclass(mmap.error, EnvironmentError))