perl-Email-Stuffer-0.017-7.fc33 fails to build in Fedora 33 because a test fails:

t/alternative.t ........... ok
#   Failed test 'Email contains attachment content-Type'
#   at t/basic.t line 140.
#                   'Date: Wed, 3 Jun 2020 04:36:14 +0000
# MIME-Version: 1.0
# From: "Adam Kennedy" <adam>
# To: adam
# Subject: Hello To:!
# Content-Transfer-Encoding: 7bit
# Content-Type: multipart/mixed; boundary=15911589743.eEe0.2542479
# 
# 
# --15911589743.eEe0.2542479
# Date: Wed, 3 Jun 2020 04:36:14 +0000
# MIME-Version: 1.0
# Content-Type: text/plain; charset=utf-8
# Content-Transfer-Encoding: quoted-printable
# 
# I am an email=
# 
# --15911589743.eEe0.2542479
# Date: Wed, 3 Jun 2020 04:36:14 +0000
# MIME-Version: 1.0
# Content-Type: text/plain; name=dist.ini
# Content-Transfer-Encoding: base64
# Content-Disposition: inline; filename=dist.ini
# 
# bmFtZSAgICA9IEVtYWlsLVN0dWZmZXIKYXV0aG9yICA9IEFkYW0gS2VubmVkeSA8YWRhbWtAY3Bh
# bi5vcmc+CmF1dGhvciAgPSBSaWNhcmRvIFNJR05FUyA8cmpic0BjcGFuLm9yZz4KbGljZW5zZSA9
# IFBlcmxfNQpjb3B5cmlnaHRfaG9sZGVyID0gQWRhbSBLZW5uZWR5IGFuZCBSaWNhcmRvIFNJR05F
# Uwpjb3B5cmlnaHRfeWVhciAgID0gMjAwNAoKW0BSSkJTXQoKW0VuY29kaW5nXQptYXRjaCAgICA9
# IF50L2RhdGEvCmVuY29kaW5nID0gYnl0ZXMKCg==
# 
# --15911589743.eEe0.2542479--
# '
#     doesn't match '(?^:Content-Type: text/plain; name="dist\.ini")'
# Looks like you failed 1 test of 73.
t/basic.t ................. 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/73 subtests 

A difference between a passing and failing build root is at <https://koschei.fedoraproject.org/build/8386351>.

This is triggered by upgrading Email::MIME to 1.949.