diff --git a/testing/lisp/test-ox-beamer.el b/testing/lisp/test-ox-beamer.el
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+;;; test-ox-beamer.el --- tests for ox-beamer.el       -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2024  Leo Butler
+
+;; Author: Leo Butler <leo.butler@umanitoba.ca>
+
+;; This program 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.
+
+;; This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Tests checking validity of Org Beamer export output.
+
+;;; Code:
+
+(require 'ox-beamer nil t)
+(unless (featurep 'ox-beamer)
+  (signal 'missing-test-dependency "org-export-beamer"))
+
+
+
+(ert-deftest ox-beamer/orgframe ()
+  "Test that `org-beamer-frame-environment' is defined and used."
+  (org-test-with-exported-text
+      'beamer
+      "#+OPTIONS: toc:nil
+* A frame
+Here is an example:
+#+begin_example
+\\begin{frame}
+...
+\\end{frame}
+#+end_example
+"
+    (goto-char (point-min))
+    (should (search-forward (concat "\\newenvironment<>{" org-beamer-frame-environment "}") nil t))
+    (should (search-forward (concat "\\begin{" org-beamer-frame-environment "}") nil t))
+    (should (search-forward (concat "\\end{" org-beamer-frame-environment "}") nil t))))
+
+(ert-deftest ox-beamer/orgframe-in-example ()
+  "Test that `org-beamer-frame-environment' is not defined."
+  (org-test-with-exported-text
+      'beamer
+      (concat "#+OPTIONS: toc:nil
+* A frame
+Here is an example:
+#+begin_example
+\\begin{" org-beamer-frame-environment "}
+...
+\\end{" org-beamer-frame-environment "}
+#+end_example
+")
+    (goto-char (point-min))
+    (should-not (search-forward
+                 (concat "\\newenvironment<>{" org-beamer-frame-environment "}") nil t))
+    (forward-line)
+    (should (search-forward (concat "\\begin{frame}") nil t))
+    (should (search-forward (concat "\\begin{" org-beamer-frame-environment "}")))
+    (should (search-forward (concat "\\end{" org-beamer-frame-environment "}")))
+    (should (search-forward (concat "\\end{frame}") nil t))))
+
+(ert-deftest ox-beamer/orgframe-in-one-example ()
+  "Test that `org-beamer-frame-environment' is defined.
+First frame should use \"frame\" environment, the second uses
+`org-beamer-frame-environment'."
+  (org-test-with-exported-text
+      'beamer
+      (concat "#+OPTIONS: toc:nil
+* A frame
+Here is an example:
+#+begin_example
+\\begin{" org-beamer-frame-environment "}
+...
+\\end{" org-beamer-frame-environment "}
+#+end_example
+
+* A second frame
+Here is a second example:
+#+begin_example
+\\begin{frame}
+...
+\\end{frame}
+#+end_example
+")
+    (goto-char (point-min))
+    (should (search-forward
+             (concat "\\newenvironment<>{" org-beamer-frame-environment "}") nil t))
+    (forward-line)
+    (org-test-ignore-duplicate
+     (should (search-forward (concat "\\begin{frame}") nil t))
+     (should (search-forward (concat "\\begin{" org-beamer-frame-environment "}")))
+     (should (search-forward (concat "\\end{" org-beamer-frame-environment "}")))
+     (should (search-forward (concat "\\end{frame}") nil t))
+     (should (search-forward (concat "\\begin{" org-beamer-frame-environment "}")))
+     (should (search-forward (concat "\\begin{frame}") nil t))
+     (should (search-forward (concat "\\end{frame}") nil t))
+     (should (search-forward (concat "\\end{" org-beamer-frame-environment "}"))))))
+
+(provide 'test-ox-beamer)
+;;; test-ox-beamer.el ends here