* test/lisp/gnus/mml-sec-tests.el (mml-secure-en-decrypt-sign-3):
(mml-secure-en-decrypt-sign-1-3-double): These tests are unstable
on Ubuntu (bug#42803).
(ert-deftest mml-secure-en-decrypt-sign-1-3-double ()
"Sign and encrypt message; then decrypt and test for expected result.
In this test, just multiple encryption and signing keys may be available."
+ :tags '(:unstable)
(skip-unless (test-conf))
(mml-secure-test-key-fixture
(lambda ()
(ert-deftest mml-secure-en-decrypt-sign-3 ()
"Sign and encrypt message; then decrypt and test for expected result.
Use sign-with-sender and encrypt-to-self."
+ :tags '(:unstable)
(skip-unless (test-conf))
(mml-secure-test-key-fixture
(lambda ()