diff --git a/src/Umbraco.Web.UI.Client/src/mocks/handlers/manifests.handlers.ts b/src/Umbraco.Web.UI.Client/src/mocks/handlers/manifests.handlers.ts
index 1b210c543d..6233357ed6 100644
--- a/src/Umbraco.Web.UI.Client/src/mocks/handlers/manifests.handlers.ts
+++ b/src/Umbraco.Web.UI.Client/src/mocks/handlers/manifests.handlers.ts
@@ -52,7 +52,7 @@ const privateManifests: PackageManifestResponse = [
 				js: '/App_Plugins/tinyMcePlugin.js',
 				meta: {
 					config: {
-						plugins: 'wordcount',
+						plugins: ['wordcount'],
 						statusbar: true,
 					},
 				},