diff --git a/packages/react-dom/src/__tests__/ReactDOMServerSelectiveHydration-test.internal.js b/packages/react-dom/src/__tests__/ReactDOMServerSelectiveHydration-test.internal.js
index 3dcdcb60dc9c..5c29513cf6bf 100644
--- a/packages/react-dom/src/__tests__/ReactDOMServerSelectiveHydration-test.internal.js
+++ b/packages/react-dom/src/__tests__/ReactDOMServerSelectiveHydration-test.internal.js
@@ -1153,7 +1153,6 @@ describe('ReactDOMServerSelectiveHydration', () => {
       );
     }
     function App() {
-      const ref = React.useRef();
       const onClick = () => {
         triggeredParent = true;
       };