diff --git a/packages/edit-site/src/components/template-part-converter/convert-to-template-part.js b/packages/edit-site/src/components/template-part-converter/convert-to-template-part.js
index 8e49e9d92abb45..e8a80ee4e299ae 100644
--- a/packages/edit-site/src/components/template-part-converter/convert-to-template-part.js
+++ b/packages/edit-site/src/components/template-part-converter/convert-to-template-part.js
@@ -56,6 +56,8 @@ export default function ConvertToTemplatePart( { clientIds, blocks } ) {
 				onClick={ () => {
 					setIsModalOpen( true );
 				} }
+				aria-expanded={ isModalOpen }
+				aria-haspopup="dialog"
 			>
 				{ __( 'Create template part' ) }
 			</MenuItem>