diff --git a/packages/eslint-config-react-app/index.js b/packages/eslint-config-react-app/index.js
index 419dc10e8d4..b0e3fb1449f 100644
--- a/packages/eslint-config-react-app/index.js
+++ b/packages/eslint-config-react-app/index.js
@@ -81,7 +81,6 @@ module.exports = {
         '@typescript-eslint/consistent-type-assertions': 'warn',
         'no-array-constructor': 'off',
         '@typescript-eslint/no-array-constructor': 'warn',
-        '@typescript-eslint/no-namespace': 'error',
         'no-use-before-define': 'off',
         '@typescript-eslint/no-use-before-define': [
           'warn',
diff --git a/test/fixtures/typescript/src/App.ts b/test/fixtures/typescript/src/App.ts
index 665f8b49f1f..ee9276a699a 100644
--- a/test/fixtures/typescript/src/App.ts
+++ b/test/fixtures/typescript/src/App.ts
@@ -27,4 +27,11 @@ function propertyDecorator(target: any, key: string) {
   };
 }
 
+declare namespace MyNamespace {
+  interface MyType {
+    foo: string;
+    bar: (n: number) => void;
+  }
+}
+
 export default App;