1 files changed, 18 insertions, 0 deletions
diff --git a/Lib/test/test_email/test_email.py b/Lib/test/test_email/test_email.py
index 7b14305f997..8765d121fd0 100644
--- a/Lib/test/test_email/test_email.py
+++ b/Lib/test/test_email/test_email.py
@@ -389,6 +389,24 @@ class TestMessageAPI(TestEmailBase):
         msg = email.message_from_string("Content-Type: blarg; baz; boo\n")
         self.assertEqual(msg.get_param('baz'), '')
 
+    def test_continuation_sorting_part_order(self):
+        msg = email.message_from_string(
+            "Content-Disposition: attachment; "
+            "filename*=\"ignored\"; "
+            "filename*0*=\"utf-8''foo%20\"; "
+            "filename*1*=\"bar.txt\"\n"
+        )
+        filename = msg.get_filename()
+        self.assertEqual(filename, 'foo bar.txt')
+
+    def test_sorting_no_continuations(self):
+        msg = email.message_from_string(
+            "Content-Disposition: attachment; "
+            "filename*=\"bar.txt\"; "
+        )
+        filename = msg.get_filename()
+        self.assertEqual(filename, 'bar.txt')
+
     def test_missing_filename(self):
         msg = email.message_from_string("From: foo\n")
         self.assertEqual(msg.get_filename(), None)