diff --git a/src/Umbraco.Web.UI.Client/package-lock.json b/src/Umbraco.Web.UI.Client/package-lock.json
index ff4c573257..5e282fcb27 100644
--- a/src/Umbraco.Web.UI.Client/package-lock.json
+++ b/src/Umbraco.Web.UI.Client/package-lock.json
@@ -10,6 +10,7 @@
"license": "MIT",
"dependencies": {
"@umbraco-ui/uui": "^0.2.1",
+ "element-internals-polyfill": "^1.1.4",
"lit": "^2.2.4",
"openapi-typescript-fetch": "^1.1.3",
"rxjs": "^7.5.5"
@@ -2972,6 +2973,11 @@
"integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=",
"dev": true
},
+ "node_modules/element-internals-polyfill": {
+ "version": "1.1.4",
+ "resolved": "https://registry.npmjs.org/element-internals-polyfill/-/element-internals-polyfill-1.1.4.tgz",
+ "integrity": "sha512-HCk2OXleHaRqrSyju+43TIUUb0/AkY6bV4tRbz8YFAWYeL+zUT6Mk0HmvbfZ19vq7zV9E+9dkNCxkYzEEVlCyA=="
+ },
"node_modules/emoji-regex": {
"version": "9.2.2",
"resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-9.2.2.tgz",
@@ -9376,6 +9382,11 @@
"integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=",
"dev": true
},
+ "element-internals-polyfill": {
+ "version": "1.1.4",
+ "resolved": "https://registry.npmjs.org/element-internals-polyfill/-/element-internals-polyfill-1.1.4.tgz",
+ "integrity": "sha512-HCk2OXleHaRqrSyju+43TIUUb0/AkY6bV4tRbz8YFAWYeL+zUT6Mk0HmvbfZ19vq7zV9E+9dkNCxkYzEEVlCyA=="
+ },
"emoji-regex": {
"version": "9.2.2",
"resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-9.2.2.tgz",
diff --git a/src/Umbraco.Web.UI.Client/package.json b/src/Umbraco.Web.UI.Client/package.json
index c346b51258..1e1bac592f 100644
--- a/src/Umbraco.Web.UI.Client/package.json
+++ b/src/Umbraco.Web.UI.Client/package.json
@@ -33,6 +33,7 @@
},
"dependencies": {
"@umbraco-ui/uui": "^0.2.1",
+ "element-internals-polyfill": "^1.1.4",
"lit": "^2.2.4",
"openapi-typescript-fetch": "^1.1.3",
"rxjs": "^7.5.5"
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 8adef81b7c..40121901ae 100644
--- a/src/Umbraco.Web.UI.Client/web-test-runner.config.mjs
+++ b/src/Umbraco.Web.UI.Client/web-test-runner.config.mjs
@@ -14,6 +14,9 @@ export default {
`
+
`,
};