diff --git a/src/__tests__/legacy-extend-expect.tsx b/src/__tests__/legacy-extend-expect.tsx
new file mode 100644
index 0000000..38fa3b2
--- /dev/null
+++ b/src/__tests__/legacy-extend-expect.tsx
@@ -0,0 +1,17 @@
+import React from 'react';
+import { View, Text } from 'react-native';
+import { render, screen } from '@testing-library/react-native';
+import '../legacy-extend-expect';
+
+test('legacy expect.extend() works correctly', () => {
+  render(
+    <View testID="view">
+      <Text>Hello</Text>
+    </View>,
+  );
+  expect(screen.getByTestId('view')).legacy_toBeOnTheScreen();
+  expect(screen.getByTestId('view')).legacy_toHaveTextContent('Hello');
+  expect(screen.getByTestId('view')).legacy_toBeVisible();
+  expect(screen.getByTestId('view')).legacy_toBeEnabled();
+  expect(screen.getByTestId('view')).not.legacy_toBeDisabled();
+});
diff --git a/tsconfig.json b/tsconfig.json
index 345818f..78157bd 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,7 +13,7 @@
     "noEmit": false,
     "outDir": "dist"
   },
-  "files": ["./extend-expect.d.ts"],
+  "files": ["./extend-expect.d.ts", "./legacy-extend-expect.d.ts"],
   "exclude": ["node_modules", "android", "ios"],
   "include": ["src/**/*", "setup-test.ts"]
 }