diff -r 5b33829badcc Lib/test/test_json/test_decode.py
--- a/Lib/test/test_json/test_decode.py	Mon Oct 24 23:49:51 2016 +0300
+++ b/Lib/test/test_json/test_decode.py	Wed Oct 26 21:26:58 2016 -0500
@@ -89,6 +89,19 @@
         self.assertEqual(self.loads(bom_in_str), '\ufeff')
         self.assertEqual(self.json.load(StringIO(bom_in_str)), '\ufeff')
 
+    def test_bytes_encodings(self):
+        encodings = [
+            'utf-8', 'utf-8-sig',
+            'utf-16', 'utf-16-be', 'utf-16-le',
+            'utf-32', 'utf-32-be', 'utf-32-le'
+        ]
+        for enc in encodings:
+            long_json = '{"snowman": "\u2603"}'.encode(enc)
+            self.assertEqual(self.loads(long_json), {'snowman': '\u2603'})
+        for enc in ['utf-16-be', 'utf-16-le']:
+            short_json = '5'.encode(enc)
+            self.assertEqual(self.loads(short_json), 5)
+
     def test_negative_index(self):
         d = self.json.JSONDecoder()
         self.assertRaises(ValueError, d.raw_decode, 'a'*42, -50000)