diff --git a/src/Umbraco.Web.UI.Client/web-test-runner.config.mjs b/src/Umbraco.Web.UI.Client/web-test-runner.config.mjs
index d429ded68d..69c726e3a3 100644
--- a/src/Umbraco.Web.UI.Client/web-test-runner.config.mjs
+++ b/src/Umbraco.Web.UI.Client/web-test-runner.config.mjs
@@ -48,7 +48,7 @@ export default {
 				<title>Umbraco</title>
 				<base href="/" />
 				<link rel="stylesheet" href="node_modules/@umbraco-ui/uui-css/dist/uui-css.css">
-				<link rel="stylesheet" href="src/core/css/custom-properties.css">
+				<link rel="stylesheet" href="libs/css/custom-properties.css">
 			</head>
       <body>
         <script type="module" src="${testFramework}"></script>
