1 files changed, 19 insertions, 0 deletions
diff --git a/Lib/test/test_email/test_headerregistry.py b/Lib/test/test_email/test_headerregistry.py
index 82e121350f..68bbc9561c 100644
--- a/Lib/test/test_email/test_headerregistry.py
+++ b/Lib/test/test_email/test_headerregistry.py
@@ -873,6 +873,25 @@ class TestContentDisposition(TestHeaderBase):
             {'filename': 'foo'},
             [errors.InvalidHeaderDefect]),
 
+        'invalid_parameter_value_with_fws_between_ew': (
+            'attachment; filename="=?UTF-8?Q?Schulbesuchsbest=C3=A4ttigung=2E?='
+            '               =?UTF-8?Q?pdf?="',
+            'attachment',
+            {'filename': 'Schulbesuchsbestättigung.pdf'},
+            [errors.InvalidHeaderDefect]*3,
+            ('attachment; filename="Schulbesuchsbestättigung.pdf"'),
+            ('Content-Disposition: attachment;\n'
+             ' filename*=utf-8\'\'Schulbesuchsbest%C3%A4ttigung.pdf\n'),
+            ),
+
+        'parameter_value_with_fws_between_tokens': (
+            'attachment; filename="File =?utf-8?q?Name?= With Spaces.pdf"',
+            'attachment',
+            {'filename': 'File Name With Spaces.pdf'},
+            [errors.InvalidHeaderDefect],
+            'attachment; filename="File Name With Spaces.pdf"',
+            ('Content-Disposition: attachment; filename="File Name With Spaces.pdf"\n'),
+            )
     }