diff --git a/src/components/FormStart/tests.spec.js b/src/components/FormStart/tests.spec.js
index b648ecbba..f837d88e3 100644
--- a/src/components/FormStart/tests.spec.js
+++ b/src/components/FormStart/tests.spec.js
@@ -10,7 +10,7 @@ import {buildSubmission} from 'api-mocks';
 import useQuery from 'hooks/useQuery';
 
 import FormStart from '.';
-import {testForm} from './fixtures';
+import {testForm, testLoginForm} from './fixtures';
 
 jest.mock('hooks/useQuery');
 let scrollIntoViewMock = jest.fn();
@@ -116,3 +116,26 @@ it('Form start page does not show login buttons if an active submission is prese
   expect(screen.queryByRole('button', {name: 'Continue existing submission'})).toBeInTheDocument();
   expect(screen.queryByRole('button', {name: 'Abort submission'})).toBeInTheDocument();
 });
+
+it('Form start page with initial_data_reference', () => {
+  useQuery.mockReturnValue(new URLSearchParams());
+  const onFormStart = jest.fn();
+  const onDestroySession = jest.fn();
+
+  renderTest(
+    <Wrap>
+      <FormStart
+        form={testLoginForm}
+        onFormStart={onFormStart}
+        onDestroySession={onDestroySession}
+        initialDataReference="1234"
+      />
+    </Wrap>,
+    container
+  );
+  const loginLink = screen.getByRole('link', {name: 'Login with DigiD'});
+  expect(loginLink).toHaveAttribute(
+    'href',
+    'https://openforms.nl/auth/form-name/digid/start?initial_data_reference=1234&next=http%3A%2F%2Flocalhost%2F%3F_start%3D1'
+  );
+});
diff --git a/src/components/IntroductionPage/IntroductionPage.stories.js b/src/components/IntroductionPage/IntroductionPage.stories.js
index 75426d914..1df91fcc2 100644
--- a/src/components/IntroductionPage/IntroductionPage.stories.js
+++ b/src/components/IntroductionPage/IntroductionPage.stories.js
@@ -1,3 +1,4 @@
+import {expect, userEvent, within} from '@storybook/test';
 import {withRouter} from 'storybook-addon-remix-react-router';
 
 import {buildForm} from 'api-mocks';
@@ -48,3 +49,15 @@ export default {
 export const Default = {
   name: 'IntroductionPage',
 };
+
+export const IntroductionPageWithInitialDataReference = {
+  name: 'IntroductionPage with initial data reference',
+  args: {
+    extraParams: {initial_data_reference: '1234'},
+  },
+  play: async ({canvasElement}) => {
+    const canvas = within(canvasElement);
+    const continueLink = canvas.getByRole('link', {name: 'Continue'});
+    await expect(continueLink).toHaveAttribute('href', '/startpagina?initial_data_reference=1234');
+  },
+};