diff --git a/test/ModalSpec.js b/test/ModalSpec.js
index 09485b9..96e0151 100644
--- a/test/ModalSpec.js
+++ b/test/ModalSpec.js
@@ -8,6 +8,7 @@ import simulant from 'simulant';
 
 import { render } from '@testing-library/react';
 import { mount } from 'enzyme';
+import { shouldWarn } from './helpers';
 
 import Modal from '../src/Modal';
 import { OPEN_DATA_ATTRIBUTE } from '../src/ModalManager';
@@ -239,6 +240,8 @@ describe('<Modal>', () => {
   });
 
   it('should pass transition callbacks to Transition', (done) => {
+    // Expected since ref is only a prop in react 19+.
+    shouldWarn('Warning: div: `ref` is not a prop');
     let count = 0;
     let increment = () => count++;