diff --git a/src/wp-includes/sitemaps.php b/src/wp-includes/sitemaps.php
index 214eb3ac1a..f3bd6d1dfc 100644
--- a/src/wp-includes/sitemaps.php
+++ b/src/wp-includes/sitemaps.php
@@ -63,7 +63,7 @@ function wp_get_sitemap_providers() {
  * @param WP_Sitemaps_Provider $provider The `Sitemaps_Provider` instance implementing the sitemap.
  * @return bool Returns true if the sitemap was added. False on failure.
  */
-function wp_register_sitemap( $name, WP_Sitemaps_Provider $provider ) {
+function wp_register_sitemap_provider( $name, WP_Sitemaps_Provider $provider ) {
 	$sitemaps = wp_sitemaps_get_server();
 	return $sitemaps->registry->add_provider( $name, $provider );
 }
diff --git a/tests/phpunit/tests/sitemaps/sitemaps.php b/tests/phpunit/tests/sitemaps/sitemaps.php
index b1f4b0557d..a2f134053a 100644
--- a/tests/phpunit/tests/sitemaps/sitemaps.php
+++ b/tests/phpunit/tests/sitemaps/sitemaps.php
@@ -389,7 +389,7 @@ class Test_Sitemaps extends WP_UnitTestCase {
 	 * Test functionality that adds a new sitemap provider to the registry.
 	 */
 	public function test_register_sitemap_provider() {
-		wp_register_sitemap( 'test_sitemap', self::$test_provider );
+		wp_register_sitemap_provider( 'test_sitemap', self::$test_provider );
 
 		$sitemaps = wp_get_sitemap_providers();
 
@@ -481,7 +481,7 @@ class Test_Sitemaps extends WP_UnitTestCase {
 	 * @preserveGlobalState disabled
 	 */
 	public function test_empty_url_list_should_return_404() {
-		wp_register_sitemap( 'foo', new WP_Sitemaps_Empty_Test_Provider( 'foo' ) );
+		wp_register_sitemap_provider( 'foo', new WP_Sitemaps_Empty_Test_Provider( 'foo' ) );
 
 		$this->go_to( home_url( '/?sitemap=foo' ) );