diff --git a/tests/unit/dom/fill-in-test.js b/tests/unit/dom/fill-in-test.js
index fba2b887c..d25a69556 100644
--- a/tests/unit/dom/fill-in-test.js
+++ b/tests/unit/dom/fill-in-test.js
@@ -6,13 +6,15 @@ import {
   _registerHook,
 } from '@ember/test-helpers';
 import { buildInstrumentedElement, insertElement } from '../../helpers/events';
-import { isIE11 } from '../../helpers/browser-detect';
+import { isIE11, isFirefox } from '../../helpers/browser-detect';
 import hasEmberVersion from '@ember/test-helpers/has-ember-version';
 
 let clickSteps = ['focus', 'focusin', 'input', 'change'];
 
 if (isIE11) {
   clickSteps = ['focusin', 'input', 'change', 'focus'];
+} else if (isFirefox) {
+  clickSteps.push('selectionchange');
 }
 
 module('DOM Helper: fillIn', function (hooks) {
@@ -226,7 +228,8 @@ module('DOM Helper: fillIn', function (hooks) {
     await setupContext(context);
     await fillIn(element, 'foo');
 
-    assert.verifySteps(clickSteps);
+    // For this specific case, Firefox does not emit `selectionchange`.
+    assert.verifySteps(clickSteps.filter((s) => s !== 'selectionchange'));
     assert.strictEqual(
       document.activeElement,
       element,
@@ -255,7 +258,8 @@ module('DOM Helper: fillIn', function (hooks) {
     await setupContext(context);
     await fillIn(`#${element.id}`, '');
 
-    assert.verifySteps(clickSteps);
+    // For this specific case, Firefox does not emit `selectionchange`.
+    assert.verifySteps(clickSteps.filter((s) => s !== 'selectionchange'));
     assert.strictEqual(
       document.activeElement,
       element,