diff --git a/src/wp-includes/sitemaps.php b/src/wp-includes/sitemaps.php
index 9600540156..f556246be5 100644
--- a/src/wp-includes/sitemaps.php
+++ b/src/wp-includes/sitemaps.php
@@ -58,7 +58,7 @@ function wp_get_sitemaps() {
 		return array();
 	}
 
-	return $sitemaps->registry->get_sitemaps();
+	return $sitemaps->registry->get_providers();
 }
 
 /**
@@ -77,7 +77,7 @@ function wp_register_sitemap( $name, WP_Sitemaps_Provider $provider ) {
 		return false;
 	}
 
-	return $sitemaps->registry->add_sitemap( $name, $provider );
+	return $sitemaps->registry->add_provider( $name, $provider );
 }
 
 /**
diff --git a/src/wp-includes/sitemaps/class-wp-sitemaps-index.php b/src/wp-includes/sitemaps/class-wp-sitemaps-index.php
index 91ceea0ae0..9449b4b6a4 100644
--- a/src/wp-includes/sitemaps/class-wp-sitemaps-index.php
+++ b/src/wp-includes/sitemaps/class-wp-sitemaps-index.php
@@ -54,7 +54,7 @@ class WP_Sitemaps_Index {
 	public function get_sitemap_list() {
 		$sitemaps = array();
 
-		$providers = $this->registry->get_sitemaps();
+		$providers = $this->registry->get_providers();
 		/* @var WP_Sitemaps_Provider $provider */
 		foreach ( $providers as $name => $provider ) {
 			$sitemap_entries = $provider->get_sitemap_entries();
diff --git a/src/wp-includes/sitemaps/class-wp-sitemaps-registry.php b/src/wp-includes/sitemaps/class-wp-sitemaps-registry.php
index c95f04c77f..1235670a27 100644
--- a/src/wp-includes/sitemaps/class-wp-sitemaps-registry.php
+++ b/src/wp-includes/sitemaps/class-wp-sitemaps-registry.php
@@ -2,7 +2,7 @@
 /**
  * Sitemaps: WP_Sitemaps_Registry class
  *
- * Handles registering sitemaps.
+ * Handles registering sitemap providers.
  *
  * @package WordPress
  * @subpackage Sitemaps
@@ -16,47 +16,47 @@
  */
 class WP_Sitemaps_Registry {
 	/**
-	 * Registered sitemaps.
+	 * Registered sitemap providers.
 	 *
 	 * @since 5.5.0
 	 *
-	 * @var WP_Sitemaps_Provider[] Array of registered sitemaps.
+	 * @var WP_Sitemaps_Provider[] Array of registered sitemap providers.
 	 */
-	private $sitemaps = array();
+	private $providers = array();
 
 	/**
 	 * Adds a sitemap with route to the registry.
 	 *
 	 * @since 5.5.0
 	 *
-	 * @param string               $name     Name of the sitemap.
+	 * @param string               $name     Name of the sitemap provider.
 	 * @param WP_Sitemaps_Provider $provider Instance of a WP_Sitemaps_Provider.
-	 * @return bool True if the sitemap was added, false if it is already registered.
+	 * @return bool True if the provider was added, false if it is already registered.
 	 */
-	public function add_sitemap( $name, WP_Sitemaps_Provider $provider ) {
-		if ( isset( $this->sitemaps[ $name ] ) ) {
+	public function add_provider( $name, WP_Sitemaps_Provider $provider ) {
+		if ( isset( $this->providers[ $name ] ) ) {
 			return false;
 		}
 
-		$this->sitemaps[ $name ] = $provider;
+		$this->providers[ $name ] = $provider;
 
 		return true;
 	}
 
 	/**
-	 * Returns a single registered sitemaps provider.
+	 * Returns a single registered sitemap provider.
 	 *
 	 * @since 5.5.0
 	 *
 	 * @param string $name Sitemap provider name.
 	 * @return WP_Sitemaps_Provider|null Sitemaps provider if it exists, null otherwise.
 	 */
-	public function get_sitemap( $name ) {
-		if ( ! isset( $this->sitemaps[ $name ] ) ) {
+	public function get_provider( $name ) {
+		if ( ! isset( $this->providers[ $name ] ) ) {
 			return null;
 		}
 
-		return $this->sitemaps[ $name ];
+		return $this->providers[ $name ];
 	}
 
 	/**
@@ -66,7 +66,7 @@ class WP_Sitemaps_Registry {
 	 *
 	 * @return WP_Sitemaps_Provider[] Array of sitemap providers.
 	 */
-	public function get_sitemaps() {
-		return $this->sitemaps;
+	public function get_providers() {
+		return $this->providers;
 	}
 }
diff --git a/src/wp-includes/sitemaps/class-wp-sitemaps.php b/src/wp-includes/sitemaps/class-wp-sitemaps.php
index 828e7931dc..01f1bf8b35 100644
--- a/src/wp-includes/sitemaps/class-wp-sitemaps.php
+++ b/src/wp-includes/sitemaps/class-wp-sitemaps.php
@@ -135,7 +135,7 @@ class WP_Sitemaps {
 		// Register each supported provider.
 		/* @var WP_Sitemaps_Provider $provider */
 		foreach ( $providers as $name => $provider ) {
-			$this->registry->add_sitemap( $name, $provider );
+			$this->registry->add_provider( $name, $provider );
 		}
 	}
 
@@ -212,7 +212,7 @@ class WP_Sitemaps {
 			exit;
 		}
 
-		$provider = $this->registry->get_sitemap( $sitemap );
+		$provider = $this->registry->get_provider( $sitemap );
 
 		if ( ! $provider ) {
 			return;
diff --git a/tests/phpunit/tests/sitemaps/sitemaps-index.php b/tests/phpunit/tests/sitemaps/sitemaps-index.php
index 56b92be569..f959da8344 100644
--- a/tests/phpunit/tests/sitemaps/sitemaps-index.php
+++ b/tests/phpunit/tests/sitemaps/sitemaps-index.php
@@ -13,8 +13,8 @@ class Test_WP_Sitemaps_Index extends WP_UnitTestCase {
 		 * There are 2 providers registered.
 		 * Hence, 3*4*2=24.
 		 */
-		$registry->add_sitemap( 'foo', new WP_Sitemaps_Test_Provider( 'foo' ) );
-		$registry->add_sitemap( 'bar', new WP_Sitemaps_Test_Provider( 'bar' ) );
+		$registry->add_provider( 'foo', new WP_Sitemaps_Test_Provider( 'foo' ) );
+		$registry->add_provider( 'bar', new WP_Sitemaps_Test_Provider( 'bar' ) );
 
 		$sitemap_index = new WP_Sitemaps_Index( $registry );
 		$this->assertCount( 24, $sitemap_index->get_sitemap_list() );
@@ -29,12 +29,12 @@ class Test_WP_Sitemaps_Index extends WP_UnitTestCase {
 		$registry = new WP_Sitemaps_Registry();
 
 		// add 3 providers, which combined produce more than the maximum 50000 sitemaps in the index.
-		$registry->add_sitemap( 'provider_1', new WP_Sitemaps_Large_Test_Provider( 25000 ) );
-		$registry->add_sitemap( 'provider_2', new WP_Sitemaps_Large_Test_Provider( 25000 ) );
-		$registry->add_sitemap( 'provider_3', new WP_Sitemaps_Large_Test_Provider( 25000 ) );
+		$registry->add_provider( 'provider_1', new WP_Sitemaps_Large_Test_Provider( 25000 ) );
+		$registry->add_provider( 'provider_2', new WP_Sitemaps_Large_Test_Provider( 25000 ) );
+		$registry->add_provider( 'provider_3', new WP_Sitemaps_Large_Test_Provider( 25000 ) );
 
 		$count = 0;
-		foreach ( $registry->get_sitemaps() as $provider ) {
+		foreach ( $registry->get_providers() as $provider ) {
 			$count += count( $provider->get_url_list( 1 ) );
 		}
 		$this->assertGreaterThan( 50000, $count );
@@ -46,7 +46,7 @@ class Test_WP_Sitemaps_Index extends WP_UnitTestCase {
 	public function test_get_sitemap_list_no_entries() {
 		$registry = new WP_Sitemaps_Registry();
 
-		$registry->add_sitemap( 'foo', new WP_Sitemaps_Empty_Test_Provider( 'foo' ) );
+		$registry->add_provider( 'foo', new WP_Sitemaps_Empty_Test_Provider( 'foo' ) );
 
 		$sitemap_index = new WP_Sitemaps_Index( $registry );
 		$this->assertCount( 0, $sitemap_index->get_sitemap_list() );
diff --git a/tests/phpunit/tests/sitemaps/sitemaps-registry.php b/tests/phpunit/tests/sitemaps/sitemaps-registry.php
index c6c664a65b..faeba78852 100644
--- a/tests/phpunit/tests/sitemaps/sitemaps-registry.php
+++ b/tests/phpunit/tests/sitemaps/sitemaps-registry.php
@@ -4,26 +4,26 @@
  * @group sitemaps
  */
 class Test_WP_Sitemaps_Registry extends WP_UnitTestCase {
-	public function test_add_sitemap() {
+	public function test_add_provider() {
 		$provider = new WP_Sitemaps_Test_Provider();
 		$registry = new WP_Sitemaps_Registry();
 
-		$actual   = $registry->add_sitemap( 'foo', $provider );
-		$sitemaps = $registry->get_sitemaps();
+		$actual   = $registry->add_provider( 'foo', $provider );
+		$sitemaps = $registry->get_providers();
 
 		$this->assertTrue( $actual );
 		$this->assertCount( 1, $sitemaps );
 		$this->assertSame( $sitemaps['foo'], $provider, 'Can not confirm sitemap registration is working.' );
 	}
 
-	public function test_add_sitemap_prevent_duplicates() {
+	public function test_add_provider_prevent_duplicates() {
 		$provider1 = new WP_Sitemaps_Test_Provider();
 		$provider2 = new WP_Sitemaps_Test_Provider();
 		$registry  = new WP_Sitemaps_Registry();
 
-		$actual1  = $registry->add_sitemap( 'foo', $provider1 );
-		$actual2  = $registry->add_sitemap( 'foo', $provider2 );
-		$sitemaps = $registry->get_sitemaps();
+		$actual1  = $registry->add_provider( 'foo', $provider1 );
+		$actual2  = $registry->add_provider( 'foo', $provider2 );
+		$sitemaps = $registry->get_providers();
 
 		$this->assertTrue( $actual1 );
 		$this->assertFalse( $actual2 );