diff --git a/ChangeLog b/ChangeLog
index 5947b195..b9fc060b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2026-03-26  Mats Lidell  <matsl@gnu.org>
+
+* test/hui-tests.el (hui--kill-region-delimited-text-and-yank-back):
+    Remove expected-result tag and expand tests.
+    (hui-tests--selectable-thing-and-bounds): Add test.
+
 2026-03-24  Mats Lidell  <matsl@gnu.org>
 
 * hui-mouse.el (profiler-report-find-entry)
diff --git a/test/hui-tests.el b/test/hui-tests.el
index b03d2fa9..a96c3942 100644
--- a/test/hui-tests.el
+++ b/test/hui-tests.el
@@ -1511,40 +1511,108 @@ line 1
 
 (ert-deftest hui--kill-region-delimited-text-and-yank-back ()
   "Verify multiple `hui:kill-region' calls followed by a `yank' works properly."
-  :expected-result :failed
   (with-temp-buffer
     (let ((transient-mark-mode t)
           (mark-even-if-inactive t)
           last-command)
-      (insert "<hi>")
-      (goto-char 2)
-      (setq last-command #'ignore)
-      (call-interactively #'hui:kill-region)
-      (should (string= (buffer-string) "<>"))
-      (yank)
-      (should (string= (buffer-string) "<hi>"))))
-  (with-temp-buffer
-    (let ((transient-mark-mode t)
-          (mark-even-if-inactive t)
-          last-command)
-      (insert "<hi>\n")
-      (goto-char 1)
-      (setq last-command #'ignore)
-      (call-interactively #'hui:kill-region)
-      (should (string= (buffer-string) "\n"))
-      (yank)
-      (should (string= (buffer-string) "<hi>\n"))))
+      (fundamental-mode)
+      (dolist (pos '(1 2))
+        (dolist (text '("{hi}" "(hi)" "[hi]" "\"hi\""))
+          (ert-info ((format "Kill thing: '%s' at pos: %s in mode: %s" text pos major-mode))
+            (erase-buffer)
+            (insert (format "%s\n" text))
+            (goto-char pos)
+            (setq last-command #'ignore)
+            (call-interactively #'hui:kill-region)
+            (should (string= (buffer-string) "\n"))
+            (yank)
+            (should (string= (buffer-string) (format "%s\n" text))))))
+
+      (text-mode)
+      (dolist (pos '(1 2))
+        (dolist (text '("{hi}" "(hi)" "[hi]"))
+          (ert-info ((format "Kill thing: '%s' at pos: %s in mode: %s" text pos major-mode))
+            (erase-buffer)
+            (insert (format "%s\n" text))
+            (goto-char pos)
+            (setq last-command #'ignore)
+            (call-interactively #'hui:kill-region)
+            (should (string= (buffer-string) "\n"))
+            (yank)
+            (should (string= (buffer-string) (format "%s\n" text))))))
+
+      (let ((text "\"hi\"")
+            (pos 1))
+        (ert-info ((format "Kill thing: '%s' at pos: %s in mode: %s" text pos major-mode))
+          (erase-buffer)
+          (insert (format "%s\n" text))
+          (goto-char pos)
+          (setq last-command #'ignore)
+          (call-interactively #'hui:kill-region)
+          (should (string= (buffer-string) "\n"))
+          (yank)
+          (should (string= (buffer-string) (format "%s\n" text)))))
+
+      (let ((text "\"hi\"")
+            (pos 2))
+        (ert-info ((format "Kill thing: '%s' at pos: %s in mode: %s" text pos major-mode))
+          (erase-buffer)
+          (insert (format "%s\n" text))
+          (goto-char 2)
+          (setq last-command #'ignore)
+          (call-interactively #'hui:kill-region)
+          (should (string= (buffer-string) "\"\"\n"))
+          (yank)
+          (should (string= (buffer-string) (format "%s\n" text))))))))
+
+(ert-deftest hui-tests--selectable-thing-and-bounds ()
+  "Verify `hui:selectable-thing-and-bounds'."
   (with-temp-buffer
     (let ((transient-mark-mode t)
           (mark-even-if-inactive t)
           last-command)
-      (insert "<hi>")
-      (goto-char 1)
-      (setq last-command #'ignore)
-      (call-interactively #'hui:kill-region)
-      (should (string= (buffer-string) ""))
-      (yank)
-      (should (string= (buffer-string) "<hi>")))))
+      (fundamental-mode)
+      (dolist (text '("{hi}" "(hi)" "[hi]"))
+        (erase-buffer)
+        (insert (format "%s\n" text))
+        (ert-info ((format "Select thing: '%s' at pos 1" text))
+          (goto-char 1)
+          (should (equal `(sexp-start ,text 1 5) (hui:selectable-thing-and-bounds))))
+        (ert-info ((format "Select thing: '%s' at pos 2" text))
+          (goto-char 2)
+          (should (equal `(symbol ,text 1 5) (hui:selectable-thing-and-bounds)))))
+
+      (ert-info ((format "Select thing within \"\" delimiters in mode: %s" major-mode))
+        (erase-buffer)
+        (insert "\"hi\"\n")
+        (goto-char 1)
+        (should (equal '(string "\"hi\"" 1 5) (hui:selectable-thing-and-bounds)))
+        (goto-char 2)
+        (should (equal '(symbol "\"hi\"" 1 5) (hui:selectable-thing-and-bounds))))
+
+      (text-mode)
+      (ert-info ((format "Select thing within \"\" delimiters in mode: %s" major-mode))
+        (erase-buffer)
+        (insert "\"hi\"\n")
+        (goto-char 1)
+        (should (equal '(string "\"hi\"" 1 5) (hui:selectable-thing-and-bounds)))
+        (goto-char 2)
+        (should (equal '(symbol "hi" 2 4) (hui:selectable-thing-and-bounds))))
+
+      (ert-info ("Select thing within <> delimiters")
+        (erase-buffer)
+        (insert "<hi>\n")
+        (goto-char 1)
+        (should (equal '(sexp-start "<hi>" 1 5) (hui:selectable-thing-and-bounds)))
+        (goto-char 2)
+        (should (equal '(symbol "hi" 2 4) (hui:selectable-thing-and-bounds))))
+
+      (ert-info ("Select thing within delimiters at eof fails")
+        (dolist (text '("{hi}" "(hi)" "[hi]" "<hi>" "\"hi\""))
+          (erase-buffer)
+          (insert text)
+          (goto-char 1)
+          (should-not (hui:selectable-thing-and-bounds)))))))
 
 ;; This file can't be byte-compiled without the `el-mock' which
 ;; is not part of the actual dependencies, so: