diff --git a/packages/ckeditor5-utils/tests/collectstylesheets.js b/packages/ckeditor5-utils/tests/collectstylesheets.js
index 0ce0edabe1f..372a5f95095 100644
--- a/packages/ckeditor5-utils/tests/collectstylesheets.js
+++ b/packages/ckeditor5-utils/tests/collectstylesheets.js
@@ -8,28 +8,24 @@
 import collectStylesheets from '../src/collectstylesheets.js';
 
 describe( 'collectStylesheets', () => {
-	const dataCkeStylesheet = document.createElement( 'style' );
-	dataCkeStylesheet.setAttribute( 'data-cke', true );
-	dataCkeStylesheet.id = 'data-cke-stylesheet';
-	dataCkeStylesheet.append( `
-		:root {
-			--variable: white;
-		}
-		.ck-content { color: black }
-		.some-styles { color: red }
-	` );
-
-	const stylesheet = document.createElement( 'style' );
-	stylesheet.id = 'stylesheet';
-	stylesheet.append( 'h2 { color: black }' );
-
-	before( async () => {
-		for ( const style of document.styleSheets ) {
-			document.head.removeChild( style.ownerNode );
-		}
-	} );
+	let dataCkeStylesheet, stylesheet;
 
 	beforeEach( async () => {
+		dataCkeStylesheet = document.createElement( 'style' );
+		dataCkeStylesheet.setAttribute( 'data-cke', true );
+		dataCkeStylesheet.id = 'data-cke-stylesheet';
+		dataCkeStylesheet.append( `
+			:root {
+				--variable: white;
+			}
+			.ck-content { color: black }
+			.some-styles { color: red }
+		` );
+
+		stylesheet = document.createElement( 'style' );
+		stylesheet.id = 'stylesheet';
+		stylesheet.append( 'h2 { color: black }' );
+
 		document.head.appendChild( dataCkeStylesheet );
 		document.head.appendChild( stylesheet );