diff --git a/packages/tsconfig/tsconfig.json b/packages/tsconfig/tsconfig.json
index 2b37a399..dd4ffc48 100644
--- a/packages/tsconfig/tsconfig.json
+++ b/packages/tsconfig/tsconfig.json
@@ -9,6 +9,7 @@
     "lib": ["ESNext"],
     "module": "ESNext",
     "moduleResolution": "node",
+    "noImplicitOverride": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,
     "resolveJsonModule": true,
diff --git a/tests/test.tsx b/tests/test.tsx
index c7a3b09c..3fbfd4af 100644
--- a/tests/test.tsx
+++ b/tests/test.tsx
@@ -5,7 +5,7 @@ export default class Test extends React.PureComponent {
 
   b?: string
 
-  render() {
+  override render() {
     return <div>Hello</div>
   }
 }