diff --git a/testing/lisp/test-ox-html.el b/testing/lisp/test-ox-html.el
index bf3ca2f29..a25488d1b 100644
--- a/testing/lisp/test-ox-html.el
+++ b/testing/lisp/test-ox-html.el
@@ -886,5 +886,115 @@ $x$"
(with-current-buffer export-buffer
(libxml-parse-xml-region)))))))
+
+
+;;; Postamble Format
+
+(ert-deftest ox-html/postamble-default ()
+ "Test default postamble"
+ (org-test-with-temp-text "Test, hi"
+ (let ((export-buffer "*Test HTML Export*")
+ (org-export-show-temporary-export-buffer nil))
+ (org-export-to-buffer 'html export-buffer
+ nil nil nil nil nil)
+ (with-current-buffer export-buffer
+ (should (= 1 (how-many "Validate")))
+ (should (= 1 (how-many "Created: ")))))))
+
+
+(ert-deftest ox-html/postamble-custom ()
+ "Test custom postamble"
+ (org-test-with-temp-text "Test, hi"
+ (let ((export-buffer "*Test HTML Export*")
+ (org-export-show-temporary-export-buffer nil))
+ (org-export-to-buffer 'html export-buffer
+ nil nil nil nil '(:html-postamble "Foobar"))
+ (with-current-buffer export-buffer
+ (should (= 0 (how-many "Validate")))
+ (should (= 0 (how-many "Created: ")))
+ (should (= 1 (how-many "Foobar")))))))
+
+(ert-deftest ox-html/postamble-custom-format ()
+ "Test a html-postamble option (not -format) containing a format string"
+ (org-test-with-temp-text "Test, hi"
+ (let ((export-buffer "*Test HTML Export*")
+ (org-export-show-temporary-export-buffer nil))
+ (org-export-to-buffer 'html export-buffer
+ nil nil nil nil '(:html-postamble "Author=%a"
+ :author "Madame Orange"))
+ (with-current-buffer export-buffer
+ (should (= 0 (how-many "Validate")))
+ (should (= 0 (how-many "Created: ")))
+ (should (= 1 (how-many "Author=Madame Orange")))))))
+
+(ert-deftest ox-html/postamble-none ()
+ "Test no postamble"
+ (org-test-with-temp-text "Test, hi"
+ (let ((export-buffer "*Test HTML Export*")
+ (org-export-show-temporary-export-buffer nil))
+ (org-export-to-buffer 'html export-buffer
+ nil nil nil nil '(:html-postamble nil))
+ (with-current-buffer export-buffer
+ (should (= 0 (how-many "Validate")))
+ (should (= 0 (how-many "Created: ")))))))
+
+(ert-deftest ox-html/postamble-format-wrong-config ()
+ "Test a html-postamble-format option, with incomplete config.
+
+This option is only picked up when html-postamble is set to
+T. This test leaves it unset, which means it is set to 'auto,
+which will make ox-html skip the html-postamble-format option
+entirely."
+ (org-test-with-temp-text "Test, hi"
+ (let ((export-buffer "*Test HTML Export*")
+ (org-export-show-temporary-export-buffer nil))
+ (org-export-to-buffer 'html export-buffer
+ nil nil nil nil '(:html-postamble-format (("en" "Foobar"))))
+ (with-current-buffer export-buffer
+ (should (= 1 (how-many "Validate")))
+ (should (= 1 (how-many "Created: ")))
+ (should (= 0 (how-many "Foobar")))))))
+
+(ert-deftest ox-html/postamble-format-proper-config ()
+ "Test a html-postamble-format option which is just a string"
+ (org-test-with-temp-text "Test, hi"
+ (let ((export-buffer "*Test HTML Export*")
+ (org-export-show-temporary-export-buffer nil))
+ (org-export-to-buffer 'html export-buffer
+ nil nil nil nil '(:html-postamble-format (("en" "Foobar"))
+ :html-postamble t))
+ (with-current-buffer export-buffer
+ (should (= 0 (how-many "Validate")))
+ (should (= 0 (how-many "Created: ")))
+ (should (= 1 (how-many "Foobar")))))))
+
+(ert-deftest ox-html/postamble-format-conflict ()
+ "Test conflicting postamble and postamble-format configs"
+ (org-test-with-temp-text "Test, hi"
+ (let ((export-buffer "*Test HTML Export*")
+ (org-export-show-temporary-export-buffer nil))
+ (org-export-to-buffer 'html export-buffer
+ nil nil nil nil '(:html-postamble-format "The format string"
+ :html-postamble "Regular postamble"))
+ (with-current-buffer export-buffer
+ (should (= 0 (how-many "Validate")))
+ (should (= 0 (how-many "Created: ")))
+ (should (= 0 (how-many "The format string")))
+ (should (= 1 (how-many "Regular postamble")))))))
+
+(ert-deftest ox-html/postamble-format-author ()
+ "Test a html-postamble-format option containing the author"
+ (org-test-with-temp-text "Test, hi"
+ (let ((export-buffer "*Test HTML Export*")
+ (org-export-show-temporary-export-buffer nil))
+ (org-export-to-buffer 'html export-buffer
+ nil nil nil nil '(:html-postamble-format (("en" "Author=%a"))
+ :html-postamble t
+ :author "Monsieur Oeuf"))
+ (with-current-buffer export-buffer
+ (should (= 0 (how-many "Validate")))
+ (should (= 0 (how-many "Created: ")))
+ (should (= 1 (how-many "Author=Monsieur Oeuf")))))))
+
(provide 'test-ox-html)
;;; test-ox-html.el ends here