diff --git a/packages/ckeditor5-utils/tests/collectstylesheets.js b/packages/ckeditor5-utils/tests/collectstylesheets.js
index 372a5f95095..9ba72d34f84 100644
--- a/packages/ckeditor5-utils/tests/collectstylesheets.js
+++ b/packages/ckeditor5-utils/tests/collectstylesheets.js
@@ -10,7 +10,7 @@ import collectStylesheets from '../src/collectstylesheets.js';
 describe( 'collectStylesheets', () => {
 	let dataCkeStylesheet, stylesheet;
 
-	beforeEach( async () => {
+	beforeEach( () => {
 		dataCkeStylesheet = document.createElement( 'style' );
 		dataCkeStylesheet.setAttribute( 'data-cke', true );
 		dataCkeStylesheet.id = 'data-cke-stylesheet';
@@ -36,7 +36,7 @@ describe( 'collectStylesheets', () => {
 		} );
 	} );
 
-	afterEach( async () => {
+	afterEach( () => {
 		sinon.restore();
 
 		dataCkeStylesheet.remove();