diff --git a/karma.config.cjs b/karma.config.cjs
index cf04274ee5..929b75362d 100644
--- a/karma.config.cjs
+++ b/karma.config.cjs
@@ -169,7 +169,14 @@ module.exports = (config) => {
           reactPlugin({
             include: '**/*.tsx',
             babel: {
-              plugins: ['module:@preact/signals-react-transform'],
+              plugins: [
+                [
+                  'module:@preact/signals-react-transform',
+                  {
+                    mode: 'all',
+                  },
+                ],
+              ],
             },
           }),
         ],
diff --git a/packages/ts/react-i18n/test/i18n.spec.tsx b/packages/ts/react-i18n/test/i18n.spec.tsx
index 93fd7bd716..71bd450bfc 100644
--- a/packages/ts/react-i18n/test/i18n.spec.tsx
+++ b/packages/ts/react-i18n/test/i18n.spec.tsx
@@ -252,7 +252,6 @@ describe('@vaadin/hilla-react-i18n', () => {
 
     describe('react integration', () => {
       it('should re-render when language changes', async () => {
-        /** @useSignals */
         function TestTranslateComponent() {
           return <div>{i18n.translate('addresses.form.city.label')}</div>;
         }