December 2025 spelling fixes

Some of the fixes are to continue to use American
rather than British spelling.
* doc/misc/modus-themes.org (my-modus-themes-engraved-faces):
Fix misspelled ‘:foreground’s.
* etc/themes/modus-themes.el (modus-themes-faces):
Fix misspelled ‘modus-themes-bold’.
* lisp/emacs-lisp/rx.el (rx--normalize-char-pattern):
Rename from rx--normalise-char-pattern.
(rx--optimize-or-args):	Rename from rx--optimise-or-args.
* lisp/frame.el (frame--special-parameters):
Fix misspelled "right-divider-width".
* lisp/net/tramp.el (tramp-fingerprint-prompt-regexp):
Use American spelling “centered”, to match current libfprintf.
* lisp/org/org-fold-core.el (org-fold-core--optimize-for-huge-buffers):
Rename from org-fold-core--optimise-for-huge-buffers.
(org-fold-core-update-optimization):
Rename from org-fold-core-update-optimisation,
leaving an alias behind.
(org-fold-core-remove-optimization):
Rename from org-fold-core-remove-optimisation,
leaving an alias behind.
* lisp/org/org.el (org-advertized-archive-subtree):
This alias is now obsolete.
* lisp/play/zone.el (zone-ignored-buffers):
Fix misspelling of ‘zone--buffer-encrypted-p’.
* lisp/progmodes/csharp-mode.el (csharp-ts-mode-faces):
Fix misspelling of ‘csharp’ group.
* lisp/vc/vc.el (vc-clonable-backends-custom-type):
Rename from vc-cloneable-backends-custom-type,
leaving an alias behind.
* test/lisp/emacs-lisp/bytecomp-tests.el:
(bytecomp-tests--warn-arity-non-compiled-callee):
Rename from bytecomp-tests--warn-arity-noncompiled-callee.
(bytecomp-test-defface-spec): Reword a deliberate misspelling
of “default” that is so common I don’t want it to pollute the
spelling dictionary.
* test/lisp/emacs-lisp/package-vc-tests.el:
(package-vc-tests-preserve-artifacts):
Rename from package-vc-tests-preserve-artifacts.
* test/lisp/eshell/em-prompt-tests.el:
(em-prompt-test/forward-backward-paragraph-1):
Reword a deliberate misspelling of “goodbye” that is so common I
don’t want it to pollute the spelling dictionary.

17 files changed, 48 insertions, 48 deletions

diff --git a/test/lisp/calendar/todo-mode-tests.el b/test/lisp/calendar/todo-mode-tests.el
index 157a4c3168c..6beff5e976d 100644
--- a/test/lisp/calendar/todo-mode-tests.el
+++ b/test/lisp/calendar/todo-mode-tests.el
@@ -825,7 +825,7 @@ automatic testing."
 Calling todo-show should display the last current todo file, not
 necessarily the new file.  After deleting the new file, todo-show
 should display the previously current (or default) todo file."
-  ;; This test has been reported to fail unreproducibly (bug#58473) or
+  ;; This test has been reported to fail irreproducibly (bug#58473) or
   ;; reproducibly only on the ZFS filesystem (bug#76381).  Since the
   ;; causes are still unknown, don't run it with 'make check'.
   :tags '(:unstable)
diff --git a/test/lisp/completion-preview-tests.el b/test/lisp/completion-preview-tests.el
index 8ce2a30bb27..c44fe313cfe 100644
--- a/test/lisp/completion-preview-tests.el
+++ b/test/lisp/completion-preview-tests.el
@@ -378,7 +378,7 @@ instead."
       (should-not exit-fn-args))))
 
 (ert-deftest completion-preview-insert-mid-symbol ()
-  "Test `completion-preview-insert-word' when point is in a mulit-word symbol."
+  "Test `completion-preview-insert-word' when point is in a multi-word symbol."
   (with-temp-buffer
     (setq-local completion-at-point-functions
                 (list
diff --git a/test/lisp/emacs-lisp/bytecomp-tests.el b/test/lisp/emacs-lisp/bytecomp-tests.el
index 0245ad3c977..a9cc6228e40 100644
--- a/test/lisp/emacs-lisp/bytecomp-tests.el
+++ b/test/lisp/emacs-lisp/bytecomp-tests.el
@@ -1313,11 +1313,11 @@ byte-compiled.  Run with dynamic binding."
  "warn-make-process-missing-keyword-value.el"
  "missing value for keyword argument :command")
 
-;;;; NEW STOUGH, 2025-07-13
+;;;; NEW STUFF, 2025-07-13
 (bytecomp--define-warning-file-test "macro-warning-position.el" ":18:8:")
 
 (bytecomp--define-warning-file-test "macro-warning-position-2.el" ":18:8:")
-;;;; END OF NEW STOUGH
+;;;; END OF NEW STUFF
 
 ;;;; Macro expansion.
 
@@ -1412,7 +1412,7 @@ byte-compiled.  Run with dynamic binding."
 
 (defun bytecomp-tests--f (x y &optional u v) (list x y u v))
 
-(ert-deftest bytecomp-tests--warn-arity-noncompiled-callee ()
+(ert-deftest bytecomp-tests--warn-arity-non-compiled-callee ()
   "Check that calls to non-compiled functions are arity-checked (bug#78685)"
   (should (not (compiled-function-p (symbol-function 'bytecomp-tests--f))))
   (let* ((source (concat ";;; -*-lexical-binding:t-*-\n"
@@ -2081,8 +2081,8 @@ EXPECTED-POINT BINDINGS (MODES \\='\\='(ruby-mode js-mode python-mode)) \
      (df '((((class color grayscale) (max-colors 75) (background light))
             :foreground "cyan"))))
     (bytecomp--with-warning-test
-     (rx "Bad face display `defualt'")
-     (df '((defualt :foreground "cyan"))))
+     (rx "Bad face display `bad-default'")
+     (df '((bad-default :foreground "cyan"))))
     (bytecomp--with-warning-test
      (rx "`:inverse' is not a valid face attribute keyword")
      (df '((t :background "blue" :inverse t))))
diff --git a/test/lisp/emacs-lisp/package-vc-tests.el b/test/lisp/emacs-lisp/package-vc-tests.el
index 3a6145f39fb..90ac0c994f4 100644
--- a/test/lisp/emacs-lisp/package-vc-tests.el
+++ b/test/lisp/emacs-lisp/package-vc-tests.el
@@ -46,7 +46,7 @@
 ;; Silence byte-compiler
 (defvar message-auto-save-directory)
 
-(defvar package-vc-tests-preserve-artefacts nil
+(defvar package-vc-tests-preserve-artifacts nil
   "When non-nil preserve temporary files and buffers produced by tests.
 Each test produces a new temporary directory for each package under
 test.  This leads to creation of [length of `package-vc-tests-packages']
@@ -140,7 +140,7 @@ the package.  Otherwise each entry is in a form of PKG."
 ;; TODO: add test for deleting packages, with asserting
 ;; `package-vc-selected-packages'
 
-;; TODO: clarify `package-vc-install-all' behaviour with regards to
+;; TODO: clarify `package-vc-install-all' behavior with regards to
 ;; packages installed with `package-vc' but not stored in
 ;; `package-vc-selected-packages' i.e., packages from ELPAs
 
@@ -412,7 +412,7 @@ names."
          ;; - keyring is saved in test directory
          (package-gnupghome-dir (expand-file-name "gnupg"
                                                   package-user-dir))
-         ;; - `package' has been initialised, and there are no
+         ;; - `package' has been initialized, and there are no
          ;;   `package-archives' defined
          (package-archives (unless package--initialized
                              (let (package-archives)
@@ -440,7 +440,7 @@ names."
                  '(package-vc-tests-install-from-elpa
                    package-vc-tests-checkout-from-elpa-install-from-checkout))
            collect name))
-         ;; - make test packages recognisable by `package' and
+         ;; - make test packages recognizable by `package' and
          ;;   `package-vc' internals:
          (package-archive-contents
           (mapcar
@@ -472,7 +472,7 @@ names."
                          package-vc-tests-elpa-packages))))
          (package-vc--archive-data-alist
           '((test-elpa :version 1 :default-vc Git)))
-         ;; - `vc-guess-backend-url' is recognising bundles as `Git'
+         ;; - `vc-guess-backend-url' is recognizing bundles as `Git'
          ;;   repositories:
          (vc-clone-heuristic-alist
           `((,(rx "test-package-" (1+ digit) ".bundle" eos)
@@ -496,7 +496,7 @@ names."
 Unbind package defined symbols, and remove package defined features and
 entries from `load-path',`load-history', and `Info-directory-list'.
 Delete temporary directories and buffers produced by tests, except for
-when PKG matches `package-vc-tests-preserve-artefacts'."
+when PKG matches `package-vc-tests-preserve-artifacts'."
   (let ((pattern (rx string-start (literal package-vc-tests-dir))))
     (dolist (entry load-history)
       (when-let* ((file (car-safe entry))
@@ -534,9 +534,9 @@ when PKG matches `package-vc-tests-preserve-artefacts'."
                           (package-vc-tests-log-buffer-name pkg
                                                             type)))
                        '(doc make)))))
-    (if (or (memq package-vc-tests-preserve-artefacts `(t ,pkg))
-            (and (listp package-vc-tests-preserve-artefacts)
-                 (memq pkg package-vc-tests-preserve-artefacts)))
+    (if (or (memq package-vc-tests-preserve-artifacts `(t ,pkg))
+            (and (listp package-vc-tests-preserve-artifacts)
+                 (memq pkg package-vc-tests-preserve-artifacts)))
         (let ((buffers
                (mapconcat (lambda (buffer)
                             (with-current-buffer buffer
diff --git a/test/lisp/erc/resources/base/modes/speaker-status.eld b/test/lisp/erc/resources/base/modes/speaker-status.eld
index 4a7d508e35c..fe3654f9117 100644
--- a/test/lisp/erc/resources/base/modes/speaker-status.eld
+++ b/test/lisp/erc/resources/base/modes/speaker-status.eld
@@ -22,7 +22,7 @@
  (0.00 ":irc.example.net 372 tester : ")
  (0.00 ":irc.example.net 372 tester :      Have fun with the image!")
  (0.00 ":irc.example.net 376 tester :End of message of the day.")
- (0.00 ":irc.example.net 501 tester x :is not a recognised user mode.")
+ (0.00 ":irc.example.net 501 tester x :is not a recognized user mode.")
  (0.00 ":NickServ!NickServ@services.int NOTICE tester :Welcome to foonet, tester! Here on foonet, we provide services to enable the registration of nicknames and channels! For details, type \2/msg NickServ help\2 and \2/msg ChanServ help\2."))
 
 ((mode 10 "MODE tester +i")
diff --git a/test/lisp/erc/resources/services/regain/taken-ghost.eld b/test/lisp/erc/resources/services/regain/taken-ghost.eld
index d5afd124a43..0a02f4dedb1 100644
--- a/test/lisp/erc/resources/services/regain/taken-ghost.eld
+++ b/test/lisp/erc/resources/services/regain/taken-ghost.eld
@@ -34,7 +34,7 @@
 
 ((mode 10 "MODE dummy` +i"))
 ((privmsg 10 "PRIVMSG NickServ :GHOST dummy")
- (0.00 ":irc.example.net 501 dummy` x :is not a recognised user mode.")
+ (0.00 ":irc.example.net 501 dummy` x :is not a recognized user mode.")
  (0.00 ":irc.example.net NOTICE dummy` :*** You are connected to irc.example.net using TLS (SSL) cipher 'TLS1.3-ECDHE-RSA-AES-256-GCM-AEAD'")
  (0.03 ":dummy`!dummy@10.0.2.100 MODE dummy` :+i")
  (0.02 ":NickServ!NickServ@services.int NOTICE dummy` :\2dummy\2 has been ghosted."))
diff --git a/test/lisp/erc/resources/services/regain/taken-regain.eld b/test/lisp/erc/resources/services/regain/taken-regain.eld
index 22635d4cc89..dacd6d866b0 100644
--- a/test/lisp/erc/resources/services/regain/taken-regain.eld
+++ b/test/lisp/erc/resources/services/regain/taken-regain.eld
@@ -31,7 +31,7 @@
  (0.00 ":irc.example.net 375 dummy` :irc.example.net message of the day")
  (0.00 ":irc.example.net 372 dummy` :       Have fun with the image!")
  (0.00 ":irc.example.net 376 dummy` :End of message of the day.")
- (0.00 ":irc.example.net 501 dummy` x :is not a recognised user mode.")
+ (0.00 ":irc.example.net 501 dummy` x :is not a recognized user mode.")
  (0.00 ":irc.example.net NOTICE dummy` :*** You are connected to irc.example.net using TLS (SSL) cipher 'TLS1.3-ECDHE-RSA-AES-256-GCM-AEAD'"))
 
 ((mode 10 "MODE dummy` +i"))
diff --git a/test/lisp/eshell/em-prompt-tests.el b/test/lisp/eshell/em-prompt-tests.el
index ed2cd02a516..7b5821c3337 100644
--- a/test/lisp/eshell/em-prompt-tests.el
+++ b/test/lisp/eshell/em-prompt-tests.el
@@ -201,10 +201,10 @@ This tests the case when `eshell-highlight-prompt' is nil."
       (eshell-insert-command "echo 'high five'")
       (eshell-insert-command "echo 'up high\n\ndown low'")
       (eshell-insert-command "echo 'too slow'")
-      (insert "echo goodby")            ; A partially-entered command.
+      (insert "echo good")            ; A partially-entered command.
       (ert-info ("Go back to the last prompt")
         (eshell-backward-paragraph)
-        (should (at-prompt-for-command-p "echo goodby")))
+        (should (at-prompt-for-command-p "echo good")))
       (ert-info ("Go back to the paragraph break")
         (eshell-backward-paragraph 2)
         (should (looking-at "\ndown low\n")))
diff --git a/test/lisp/net/tramp-tests.el b/test/lisp/net/tramp-tests.el
index 3eb54f2b58d..979ff7edfc0 100644
--- a/test/lisp/net/tramp-tests.el
+++ b/test/lisp/net/tramp-tests.el
@@ -3883,7 +3883,7 @@ This tests also `access-file', `file-readable-p',
               (delete-file tmp-name2)
 
               ;; A non-existent or cyclic link target makes the file
-              ;; unaccessible.
+              ;; inaccessible.
               (dolist (target
                        `("does-not-exist" ,(file-name-nondirectory tmp-name2)))
                 (make-symbolic-link target tmp-name2)
diff --git a/test/lisp/progmodes/cperl-mode-tests.el b/test/lisp/progmodes/cperl-mode-tests.el
index 424e89604b3..94d73322c3a 100644
--- a/test/lisp/progmodes/cperl-mode-tests.el
+++ b/test/lisp/progmodes/cperl-mode-tests.el
@@ -217,7 +217,7 @@ attributes, prototypes and signatures."
           (goto-char end-of-sub))))))
 
 (ert-deftest cperl-test-fontify-builtin-constants ()
-  "Test fontificiation of the floating point constants \"nan\" and \"inf\"."
+  "Test fontification of the floating point constants \"nan\" and \"inf\"."
   (skip-unless (eq cperl-test-mode #'cperl-mode))
   (let ((constants '("my $min=-builtin::inf;"
                      "my $unknown = builtin::nan;"
diff --git a/test/lisp/progmodes/elixir-ts-mode-resources/indent.erts b/test/lisp/progmodes/elixir-ts-mode-resources/indent.erts
index f2d0eacee5b..8cbae399f3b 100644
--- a/test/lisp/progmodes/elixir-ts-mode-resources/indent.erts
+++ b/test/lisp/progmodes/elixir-ts-mode-resources/indent.erts
@@ -79,7 +79,7 @@ def foo() do
 end
 =-=-=
 
-Name: Bitstring mulitline
+Name: Bitstring multiline
 
 =-=
 <<12, 22,
diff --git a/test/lisp/textmodes/ispell-tests/ispell-tests.el b/test/lisp/textmodes/ispell-tests/ispell-tests.el
index 8f733d05d2c..15687ed6f0f 100644
--- a/test/lisp/textmodes/ispell-tests/ispell-tests.el
+++ b/test/lisp/textmodes/ispell-tests/ispell-tests.el
@@ -135,7 +135,7 @@ Give `ispell-program-name' a real spellchecker."
   "Check that `ispell-call-process' works.
 This test fails, because HOME is not defined.
 This should not be the case, because `ispell-call-process'
-whould be making sure that the directory for running
+would be making sure that the directory for running
 the backend's process exists."
   :expected-result :failed
   (should
@@ -175,7 +175,7 @@ makes it useless."
          (equal (buffer-string) string-to-send))))))
 
 (ert-deftest ispell/ispell-call-process-region/cat-random ()
-  "Check `ispell-call-process-region' works with unrelad process.
+  "Check `ispell-call-process-region' works with unrelated process.
 This test is expected to fail, because at the moment, there is
 a construction (let ((default-directory `default-directory'))...) in
 the `ispell-with-safe-default-directory' function, which effectively
@@ -212,7 +212,7 @@ makes it useless."
 This function only works for aspell and ispell, for hunspell and
 enchant-2 it always returns either default or everything.
 I think this is an issue in itself, but this test is added to verify
-that changes to third-party code do not break existing behaviour."
+that changes to third-party code do not break existing behavior."
   (skip-unless (executable-find "hunspell"))
   (skip-unless (equal 0 (call-process "hunspell" nil nil nil)))
   (ispell-tests--letopt
@@ -233,7 +233,7 @@ that changes to third-party code do not break existing behaviour."
 This function only works for aspell and ispell, for hunspell and
 enchant-2 it always returns either default or everything.
 I think this is an issue in itself, but this test is added to verify
-that changes to third-party code do not break existing behaviour."
+that changes to third-party code do not break existing behavior."
   (skip-unless (executable-find "hunspell"))
   (skip-unless (equal 0 (call-process "hunspell" nil nil nil)))
   (ispell-tests--letopt
@@ -254,7 +254,7 @@ that changes to third-party code do not break existing behaviour."
 This function only works for aspell and ispell, for hunspell and
 enchant-2 it always returns either default or everything.
 I think this is an issue in itself, but this test is added to verify
-that changes to third-party code do not break existing behaviour."
+that changes to third-party code do not break existing behavior."
   (skip-unless (executable-find "enchant-2"))
   (ispell-tests--letopt
           ((ispell-program-name "enchant-2")
@@ -274,7 +274,7 @@ that changes to third-party code do not break existing behaviour."
 This function only works for aspell and ispell, for hunspell and
 enchant-2 it always returns either default or everything.
 I think this is an issue in itself, but this test is added to verify
-that changes to third-party code do not break existing behaviour."
+that changes to third-party code do not break existing behavior."
   (skip-unless (executable-find "enchant-2"))
   (ispell-tests--letopt
             ((ispell-program-name "enchant-2")
@@ -525,8 +525,8 @@ presumably nobody will have `ispell-tests--constants/english/wrong'
                                   (expand-file-name
                                    (format "%s" (random))
                                    temporary-file-directory))))
-  (ert-deftest ispell/ispell-buffer-local-dict/no-reload+no-overriden ()
-    "ispell.el can recognise keyword-defined dictionary and keyword-defined
+  (ert-deftest ispell/ispell-buffer-local-dict/no-reload+no-overridden ()
+    "ispell.el can recognize keyword-defined dictionary and keyword-defined
 personal-dictionary."
     (with-temp-buffer
       (nxml-mode)
@@ -541,8 +541,8 @@ personal-dictionary."
                    (should (equal ispell-local-pdict test-pdict)))
                  possible-pdict-paths))))
 
-  (ert-deftest ispell/ispell-buffer-local-dict/reload+no-overriden ()
-    "ispell.el can recognise keyword-defined dictionary and keyword-defined
+  (ert-deftest ispell/ispell-buffer-local-dict/reload+no-overridden ()
+    "ispell.el can recognize keyword-defined dictionary and keyword-defined
 personal-dictionary."
     :expected-result :failed
     (with-temp-buffer
@@ -559,8 +559,8 @@ personal-dictionary."
                      (should (equal ispell-current-personal-dictionary test-pdict))))
                  possible-pdict-paths))))
 
-  (ert-deftest ispell/ispell-buffer-local-dict/no-reload+overriden ()
-    "ispell.el can recognise keyword-defined dictionary and keyword-defined
+  (ert-deftest ispell/ispell-buffer-local-dict/no-reload+overridden ()
+    "ispell.el can recognize keyword-defined dictionary and keyword-defined
 personal-dictionary.  With no-reload it needs no backend at all."
     (with-temp-buffer
       (nxml-mode)
@@ -577,8 +577,8 @@ personal-dictionary.  With no-reload it needs no backend at all."
                      (should (equal ispell-local-pdict test-pdict))))
                  possible-pdict-paths))))
 
-  (ert-deftest ispell/ispell-buffer-local-dict/reload+overriden ()
-    "ispell.el can recognise keyword-defined dictionary and keyword-defined
+  (ert-deftest ispell/ispell-buffer-local-dict/reload+overridden ()
+    "ispell.el can recognize keyword-defined dictionary and keyword-defined
 personal-dictionary.  With no-reload it needs no backend at all."
     :expected-result :failed
     (with-temp-buffer
@@ -601,7 +601,7 @@ personal-dictionary.  With no-reload it needs no backend at all."
 ;; parsing
 
 (ert-deftest ispell/ispell-buffer-local-parsing/local-keyword ()
-  "Check that ispell.el can suscessfully pick up a tex parser from a buffer-local keyword."
+  "Check that ispell.el can successfully pick up a tex parser from a buffer-local keyword."
   ;; FIXME: what if default dictionary sets
   ;; (ispell-get-extended-character-mode) ?
   (with-temp-buffer
@@ -640,7 +640,7 @@ personal-dictionary.  With no-reload it needs no backend at all."
   )
 
 (ert-deftest ispell/ispell-buffer-local-parsing/local-keyword/hunspell-bug ()
-  "Check that ispell.el can suscessfully pick up a tex parser from a buffer-local keyword."
+  "Check that ispell.el can successfully pick up a tex parser from a buffer-local keyword."
   ;; FIXME: what if default dictionary sets
   ;; (ispell-get-extended-character-mode) ?
   :expected-result :failed
@@ -679,7 +679,7 @@ personal-dictionary.  With no-reload it needs no backend at all."
   )
 
 (ert-deftest ispell/ispell-buffer-local-parsing/mode-tex ()
-  "Check that ispell.el can suscessfully pick up a tex parser from tex-based mode-name.
+  "Check that ispell.el can successfully pick up a tex parser from tex-based mode-name.
 There is another implicit check here: explicit-character-mode
 \(argument 7 from the ispell.el dictionary structure) is nil."
   (with-temp-buffer
@@ -716,7 +716,7 @@ There is another implicit check here: explicit-character-mode
   )
 
 (ert-deftest ispell/ispell-buffer-local-parsing/extended-character-mode ()
-  "Check that ispell.el can suscessfully pick up an extended character mode from the dictionary."
+  "Check that ispell.el can successfully pick up an extended character mode from the dictionary."
   (with-temp-buffer
     (insert
      ispell-tests--constants/english/correct-one "\n\n\n")
diff --git a/test/lisp/vc/diff-mode-tests.el b/test/lisp/vc/diff-mode-tests.el
index b82fb3effbe..24d08ba7a9f 100644
--- a/test/lisp/vc/diff-mode-tests.el
+++ b/test/lisp/vc/diff-mode-tests.el
@@ -686,7 +686,7 @@ orange
           (insert patch)
           (goto-char (point-min))
           (diff-hunk-next)
-          ;; Undo hunk by dwim behaviour
+          ;; Undo hunk by dwim behavior
           (cl-letf (((symbol-function 'y-or-n-p) #'always))
             (diff-apply-hunk)))
         (with-current-buffer buf-after
@@ -734,7 +734,7 @@ plum
           (insert patch)
           (goto-char (point-min))
           (diff-hunk-next)
-          ;; Undo hunk by dwim behaviour
+          ;; Undo hunk by dwim behavior
           (cl-letf (((symbol-function 'y-or-n-p) #'always))
             (diff-apply-hunk)))
         (with-current-buffer buf-after
diff --git a/test/lisp/vc/log-edit-tests.el b/test/lisp/vc/log-edit-tests.el
index fdc9a0b41b9..1c9a6a2b603 100644
--- a/test/lisp/vc/log-edit-tests.el
+++ b/test/lisp/vc/log-edit-tests.el
@@ -407,7 +407,7 @@ CVS: Abort checkin if you answer no.
   "Strip lines that contain solely \"CVS:\" when using CVS as VC backend."
   ;; This test verifies that lines consisting only of "CVS:" (no blank
   ;; after the colon) are stripped from the commit message.
-  ;; CVS does this to accomodate editors that delete trailing whitespace.
+  ;; CVS does this to accommodate editors that delete trailing whitespace.
   (let (string wanted)
     (setq string "CVS:\n"
           wanted "")
diff --git a/test/manual/etags/merc-src/accumulator.m b/test/manual/etags/merc-src/accumulator.m
index 0ee41216c11..2bfe142a935 100644
--- a/test/manual/etags/merc-src/accumulator.m
+++ b/test/manual/etags/merc-src/accumulator.m
@@ -53,7 +53,7 @@
 % in CVS papers archive in the directory update, but has been submitted
 % to PPDP '00.
 %
-% The transformation recognises predicates in the form
+% The transformation recognizes predicates in the form
 %
 % p(In, OutUpdate, OutAssoc) :-
 %   minimal(In),
diff --git a/test/src/editfns-tests.el b/test/src/editfns-tests.el
index a66e25ddc6a..e387460a149 100644
--- a/test/src/editfns-tests.el
+++ b/test/src/editfns-tests.el
@@ -368,7 +368,7 @@ Execute tests as described by `editfns-tests--transpose-regions-tests'."
               (should (equal (mapcar #'marker-position pmarkers) pmpos))
             ;; Meh.  This more or less blindly duplicates function
             ;; transpose_markers, since I have been too lazy to
-            ;; reproduce the arithmetics myself.
+            ;; reproduce the arithmetic myself.
             (setq pmpos
                   (mapcar
                    (lambda (pos)
diff --git a/test/src/treesit-tests.el b/test/src/treesit-tests.el
index 89303114735..e107829621a 100644
--- a/test/src/treesit-tests.el
+++ b/test/src/treesit-tests.el
@@ -235,7 +235,7 @@
 ;;; Linecol
 
 (ert-deftest treesit-linecol-basic ()
-  "Tests for basic lincol synchronization."
+  "Tests for basic linecol synchronization."
   (skip-unless (fboundp 'treesit--linecol-cache))
   (with-temp-buffer
     (should (equal (treesit--linecol-cache)