1 files changed, 15 insertions, 0 deletions
diff --git a/Lib/email/test/test_email.py b/Lib/email/test/test_email.py
index 59163f4..0d7e79f 100644
--- a/Lib/email/test/test_email.py
+++ b/Lib/email/test/test_email.py
@@ -1361,6 +1361,21 @@ multipart/mixed
     text/plain
 """)
 
+    def test_boundary_in_non_multipart(self):
+        msg = self._msgobj('msg_40.txt')
+        self.assertEqual(msg.as_string(), '''\
+MIME-Version: 1.0
+Content-Type: text/html; boundary="--961284236552522269"
+
+----961284236552522269
+Content-Type: text/html;
+Content-Transfer-Encoding: 7Bit
+
+<html></html>
+
+----961284236552522269--
+''')
+
 
 
 # Test some badly formatted messages