diff --git a/packages/react-reconciler/src/__tests__/StrictEffectsMode-test.js b/packages/react-reconciler/src/__tests__/StrictEffectsMode-test.js
index cc90b139a7217..62ff0e19e6230 100644
--- a/packages/react-reconciler/src/__tests__/StrictEffectsMode-test.js
+++ b/packages/react-reconciler/src/__tests__/StrictEffectsMode-test.js
@@ -14,7 +14,6 @@ let ReactTestRenderer;
 let Scheduler;
 let act;
 let assertLog;
-let StrictMode;
 
 describe('StrictEffectsMode', () => {
   beforeEach(() => {