1 files changed, 7 insertions, 0 deletions
diff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index 9250ef2..8e1f0b1 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -697,6 +697,13 @@ class UnicodeTest(
         print >>out, u'def\n'
         print >>out, u'def\n'
 
+    def test_ucs4(self):
+        if sys.maxunicode == 0xFFFF:
+            return
+        x = u'\U00100000'
+        y = x.encode("raw-unicode-escape").decode("raw-unicode-escape")
+        self.assertEqual(x, y)
+
 def test_main():
     test_support.run_unittest(UnicodeTest)