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diff --git a/test/lisp/textmodes/bibtex-tests.el b/test/lisp/textmodes/bibtex-tests.el
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+;;; bibtex-tests.el --- Test suite for bibtex.  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2013-2022 Free Software Foundation, Inc.
+
+;; Keywords: bibtex
+
+;; 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 <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'ert)
+(require 'bibtex)
+
+(ert-deftest bibtex-test-set-dialect ()
+  "Tests if `bibtex-set-dialect' is executed."
+  (with-temp-buffer
+    (insert "@article{someID,
+  author = {some author},
+  title = {some title},
+}")
+    (bibtex-mode)
+    (should-not (null bibtex-dialect))
+    (should-not (null bibtex-entry-type))
+    (should-not (null bibtex-entry-head))
+    (should-not (null bibtex-reference-key))
+    (should-not (null bibtex-entry-head))
+    (should-not (null bibtex-entry-maybe-empty-head))
+    (should-not (null bibtex-any-valid-entry-type))))
+
+(ert-deftest bibtex-test-parse-buffers-stealthily ()
+  "Tests if `bibtex-parse-buffers-stealthily' can be executed."
+  (with-temp-buffer
+    (insert "@article{someID,
+  author = {some author},
+  title = {some title},
+}")
+    (bibtex-mode)
+    (should (progn (bibtex-parse-buffers-stealthily) t))))
+
+(provide 'bibtex-tests)
+
+;;; bibtex-tests.el ends here