test: fix: await the correct alert

Co-authored-by: Brian Smith <[email protected]>

Author: kdmccormick

src/library-authoring/create-legacy-library/CreateLegacyLibrary.test.tsx

@@ -180,16 +180,15 @@ describe('<CreateLegacyLibrary />', () => {
     await user.click(slugInput);
     await user.type(slugInput, 'test_library_slug');
 
-    fireEvent.click(await screen.findByRole('button', { name: /create/i }));
+    await user.click(await screen.findByRole('button', { name: /create/i }));
     await waitFor(async () => {
       expect(axiosMock.history.post.length).toBe(1);
       expect(axiosMock.history.post[0].data).toBe(
         '{"display_name":"Test Library Name","org":"org1","number":"test_library_slug"}',
       );
       expect(mockNavigate).not.toHaveBeenCalled();
-      const errorMessage = 'Request failed with status code 400{ "field": "Error message" }';
-      expect(await screen.findByRole('alert')).toHaveTextContent(errorMessage);
     });
+    await screen.findByText('Request failed with status code 400');
   });
 
   test('cancel creating library navigates to libraries page', async () => {