diff --git a/app/assets/javascripts/discourse/tests/acceptance/composer-editor-mentions-test.js b/app/assets/javascripts/discourse/tests/acceptance/composer-editor-mentions-test.js
index 864915c9412..2f474d946e6 100644
--- a/app/assets/javascripts/discourse/tests/acceptance/composer-editor-mentions-test.js
+++ b/app/assets/javascripts/discourse/tests/acceptance/composer-editor-mentions-test.js
@@ -2,6 +2,7 @@ import { test } from "qunit";
 import { click, fillIn, triggerKeyEvent, visit } from "@ember/test-helpers";
 import {
   acceptance,
+  emulateAutocomplete,
   exists,
   fakeTime,
   loggedInUser,
@@ -64,19 +65,7 @@ acceptance("Composer - editor mentions", function (needs) {
     await visit("/");
     await click("#create-topic");
 
-    // Emulate user pressing backspace in the editor
-    const editor = query(".d-editor-input");
-
-    await triggerKeyEvent(".d-editor-input", "keydown", "@");
-    await fillIn(".d-editor-input", "abc @");
-    await setCaretPosition(editor, 5);
-    await triggerKeyEvent(".d-editor-input", "keyup", "@");
-
-    await triggerKeyEvent(".d-editor-input", "keydown", "U");
-    await fillIn(".d-editor-input", "abc @u");
-    await setCaretPosition(editor, 6);
-    await triggerKeyEvent(".d-editor-input", "keyup", "U");
-
+    await emulateAutocomplete(".d-editor-input", "abc @u");
     await click(".autocomplete.ac-user .selected");
 
     assert.strictEqual(
@@ -145,14 +134,7 @@ acceptance("Composer - editor mentions", function (needs) {
     await visit("/");
     await click("#create-topic");
 
-    // emulate typing in "abc @u"
-    const editor = query(".d-editor-input");
-    await fillIn(".d-editor-input", "@");
-    await setCaretPosition(editor, 5);
-    await triggerKeyEvent(".d-editor-input", "keyup", "@");
-    await fillIn(".d-editor-input", "@u");
-    await setCaretPosition(editor, 6);
-    await triggerKeyEvent(".d-editor-input", "keyup", "U");
+    await emulateAutocomplete(".d-editor-input", "@u");
 
     assert.ok(
       exists(`.autocomplete .emoji[title='${status.emoji}']`),
@@ -174,20 +156,14 @@ acceptance("Composer - editor mentions", function (needs) {
     await visit("/");
     await click("#create-topic");
 
-    await fillIn(".d-editor-input", "abc @");
-    await triggerKeyEvent(".d-editor-input", "keyup", "@");
-    await fillIn(".d-editor-input", "abc @u");
-    await triggerKeyEvent(".d-editor-input", "keyup", "U");
+    await emulateAutocomplete(".d-editor-input", "abc @u");
 
     assert.deepEqual(
       [...queryAll(".ac-user .username")].map((e) => e.innerText),
       ["user", "user2", "user_group", "foo"]
     );
 
-    await fillIn(".d-editor-input", "abc @");
-    await triggerKeyEvent(".d-editor-input", "keyup", "@");
-    await fillIn(".d-editor-input", "abc @f");
-    await triggerKeyEvent(".d-editor-input", "keyup", "F");
+    await emulateAutocomplete(".d-editor-input", "abc @f");
 
     assert.deepEqual(
       [...queryAll(".ac-user .username")].map((e) => e.innerText),
diff --git a/app/assets/javascripts/discourse/tests/acceptance/hashtag-autocomplete-test.js b/app/assets/javascripts/discourse/tests/acceptance/hashtag-autocomplete-test.js
index 2849bd73a00..f6051259273 100644
--- a/app/assets/javascripts/discourse/tests/acceptance/hashtag-autocomplete-test.js
+++ b/app/assets/javascripts/discourse/tests/acceptance/hashtag-autocomplete-test.js
@@ -1,28 +1,10 @@
-import { setCaretPosition } from "discourse/lib/utilities";
-import { acceptance, query } from "discourse/tests/helpers/qunit-helpers";
 import {
-  click,
-  fillIn,
-  settled,
-  triggerKeyEvent,
-  visit,
-} from "@ember/test-helpers";
+  acceptance,
+  emulateAutocomplete,
+} from "discourse/tests/helpers/qunit-helpers";
+import { click, visit } from "@ember/test-helpers";
 import { test } from "qunit";
 
-async function typeHashtagAutocomplete() {
-  const composerInput = query(".d-editor-input");
-  await fillIn(".d-editor-input", "abc #");
-  await triggerKeyEvent(".d-editor-input", "keydown", "#");
-  await fillIn(".d-editor-input", "abc #");
-  await setCaretPosition(composerInput, 5);
-  await triggerKeyEvent(".d-editor-input", "keyup", "#");
-  await triggerKeyEvent(".d-editor-input", "keydown", "O");
-  await fillIn(".d-editor-input", "abc #o");
-  await setCaretPosition(composerInput, 6);
-  await triggerKeyEvent(".d-editor-input", "keyup", "O");
-  await settled();
-}
-
 acceptance("#hashtag autocompletion in composer", function (needs) {
   needs.user();
   needs.settings({
@@ -71,7 +53,9 @@ acceptance("#hashtag autocompletion in composer", function (needs) {
   test(":emoji: unescape in autocomplete search results", async function (assert) {
     await visit("/t/internationalization-localization/280");
     await click("#topic-footer-buttons .btn.create");
-    await typeHashtagAutocomplete();
+
+    await emulateAutocomplete(".d-editor-input", "abc #o");
+
     assert.dom(".hashtag-autocomplete__option").exists({ count: 3 });
     assert
       .dom(
diff --git a/app/assets/javascripts/discourse/tests/helpers/qunit-helpers.js b/app/assets/javascripts/discourse/tests/helpers/qunit-helpers.js
index cbf2a1afb51..3f3bd8b358f 100644
--- a/app/assets/javascripts/discourse/tests/helpers/qunit-helpers.js
+++ b/app/assets/javascripts/discourse/tests/helpers/qunit-helpers.js
@@ -11,7 +11,12 @@ import {
   mergeSettings,
 } from "discourse/tests/helpers/site-settings";
 import { forceMobile, resetMobile } from "discourse/lib/mobile";
-import { getApplication, settled } from "@ember/test-helpers";
+import {
+  fillIn,
+  getApplication,
+  settled,
+  triggerKeyEvent,
+} from "@ember/test-helpers";
 import { getOwner } from "discourse-common/lib/get-owner";
 import { run } from "@ember/runloop";
 import { setupApplicationTest } from "ember-qunit";
@@ -579,6 +584,16 @@ export async function paste(element, text, otherClipboardData = {}) {
   return e;
 }
 
+export async function emulateAutocomplete(inputSelector, text) {
+  await triggerKeyEvent(inputSelector, "keydown", "Backspace");
+  await fillIn(inputSelector, `${text} `);
+  await triggerKeyEvent(inputSelector, "keyup", "Backspace");
+
+  await triggerKeyEvent(inputSelector, "keydown", "Backspace");
+  await fillIn(inputSelector, text);
+  await triggerKeyEvent(inputSelector, "keyup", "Backspace");
+}
+
 // The order of attributes can vary in different browsers. When comparing
 // HTML strings from the DOM, this function helps to normalize them to make
 // comparison work cross-browser