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diff --git a/test/src/keymap-tests.el b/test/src/keymap-tests.el
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+;;; keymap-tests.el --- Test suite for src/keymap.c
+
+;; Copyright (C) 2015 Free Software Foundation, Inc.
+
+;; Author: Juanma Barranquero <lekktu@gmail.com>
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(require 'ert)
+
+(ert-deftest keymap-store_in_keymap-FASTINT-on-nonchars ()
+  "Check for bug fixed in \"Fix assertion violation in define-key\",
+commit 86c19714b097aa477d339ed99ffb5136c755a046."
+  (let ((def (lookup-key Buffer-menu-mode-map [32])))
+    (unwind-protect
+        (progn
+          (should-not (eq def 'undefined))
+          ;; This will cause an assertion violation if the bug is present.
+          ;; We could run an inferior Emacs process and check for the return
+          ;; status, but in some environments an assertion failure triggers
+          ;; an abort dialog that requires user intervention anyway.
+          (define-key Buffer-menu-mode-map [(32 . 32)] 'undefined)
+          (should (eq (lookup-key Buffer-menu-mode-map [32]) 'undefined)))
+      (define-key Buffer-menu-mode-map [32] def))))
+
+(provide 'keymap-tests)
+
+;;; keymap-tests.el ends here