Kill execfile(), use exec() instead
diff --git a/Lib/test/test_multibytecodec.py b/Lib/test/test_multibytecodec.py
index 32c48fb..c2f34e5 100644
--- a/Lib/test/test_multibytecodec.py
+++ b/Lib/test/test_multibytecodec.py
@@ -49,7 +49,7 @@
         try:
             for enc in ALL_CJKENCODINGS:
                 print('# coding:', enc, file=io.open(TESTFN, 'w'))
-                execfile(TESTFN)
+                exec(open(TESTFN).read())
         finally:
             test_support.unlink(TESTFN)