Tag an mml-sec test

* test/lisp/gnus/mml-sec-tests.el (mml-secure-en-decrypt-3):
Tag unstable on hydra.nixos.org due to repeated intermittent failures.

diff --git a/test/lisp/gnus/mml-sec-tests.el b/test/lisp/gnus/mml-sec-tests.el
index 182d82b96187cf0a0c0e694951ab6e0b507f1e12..f308a6176456f19a32c0dd158d5142355a2728bc 100644 (file)
--- a/test/lisp/gnus/mml-sec-tests.el
+++ b/test/lisp/gnus/mml-sec-tests.el
@@ -605,6 +605,9 @@ In this test, the encryption key needs to fixed among multiple ones."
 (ert-deftest mml-secure-en-decrypt-3 ()
   "Encrypt message; then decrypt and test for expected result.
 In this test, encrypt-to-self variables are set to t."
+  ;; Random failures with "wrong-type-argument stringp nil".
+  ;; Seems unlikely to be specific to hydra.nixos.org...
+  :tags (if (getenv "EMACS_HYDRA_CI") '(:unstable))
   (skip-unless (test-conf))
   (skip-unless (ignore-errors (epg-find-configuration 'CMS)))
   ;; sub@example.org with multiple candidate keys,