diff --git a/src/wp-includes/class-wp-query.php b/src/wp-includes/class-wp-query.php
index a52b5a484e..3fcb942aa7 100644
--- a/src/wp-includes/class-wp-query.php
+++ b/src/wp-includes/class-wp-query.php
@@ -3191,7 +3191,7 @@ class WP_Query {
 
 						return $this->posts;
 					} elseif ( 'id=>parent' === $q['fields'] ) {
-						_prime_post_parents_caches( $post_ids );
+						_prime_post_parent_id_caches( $post_ids );
 
 						/** @var int[] */
 						$post_parents = wp_cache_get_multiple( $post_ids, 'post_parent' );
diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index 1f2c65e158..a85d8fbdb5 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -7797,7 +7797,7 @@ function _prime_post_caches( $ids, $update_term_cache = true, $update_meta_cache
 }
 
 /**
- * Prime post parent caches.
+ * Prime the cache containing the parent ID of various post objects.
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
@@ -7805,7 +7805,7 @@ function _prime_post_caches( $ids, $update_term_cache = true, $update_meta_cache
  *
  * @param int[] $ids ID list.
  */
-function _prime_post_parents_caches( array $ids ) {
+function _prime_post_parent_id_caches( array $ids ) {
 	global $wpdb;
 
 	$non_cached_ids = _get_non_cached_ids( $ids, 'post_parent' );
diff --git a/tests/phpunit/tests/post/primePostParentsCaches.php b/tests/phpunit/tests/post/primePostParentsCaches.php
index a430450aab..6365688c22 100644
--- a/tests/phpunit/tests/post/primePostParentsCaches.php
+++ b/tests/phpunit/tests/post/primePostParentsCaches.php
@@ -1,19 +1,19 @@
 <?php
 /**
- * Test `_prime_post_parents_caches()`.
+ * Test `_prime_post_parent_id_caches()`.
  *
  * @package WordPress
  */
 
 /**
- * Test class for `_prime_post_parents_caches()`.
+ * Test class for `_prime_post_parent_id_caches()`.
  *
  * @group post
  * @group cache
  *
- * @covers ::_prime_post_parents_caches
+ * @covers ::_prime_post_parent_id_caches
  */
-class Tests_Post_PrimePostParentsCaches extends WP_UnitTestCase {
+class Tests_Post_PrimePostParentIdCaches extends WP_UnitTestCase {
 
 	/**
 	 * Post IDs.
@@ -34,11 +34,11 @@ class Tests_Post_PrimePostParentsCaches extends WP_UnitTestCase {
 	/**
 	 * @ticket 59188
 	 */
-	public function test_prime_post_parents_caches() {
+	public function test_prime_post_parent_id_caches() {
 		$post_id = self::$posts[0];
 
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( array( $post_id ) );
+		_prime_post_parent_id_caches( array( $post_id ) );
 		$num_queries = get_num_queries() - $before_num_queries;
 
 		$this->assertSame( 1, $num_queries, 'Unexpected number of queries.' );
@@ -48,9 +48,9 @@ class Tests_Post_PrimePostParentsCaches extends WP_UnitTestCase {
 	/**
 	 * @ticket 59188
 	 */
-	public function test_prime_post_parents_caches_multiple() {
+	public function test_prime_post_parent_id_caches_multiple() {
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( self::$posts );
+		_prime_post_parent_id_caches( self::$posts );
 		$num_queries = get_num_queries() - $before_num_queries;
 
 		$this->assertSame( 1, $num_queries, 'Unexpected number of queries.' );
@@ -60,10 +60,10 @@ class Tests_Post_PrimePostParentsCaches extends WP_UnitTestCase {
 	/**
 	 * @ticket 59188
 	 */
-	public function test_prime_post_parents_caches_multiple_runs() {
-		_prime_post_parents_caches( self::$posts );
+	public function test_prime_post_parent_id_caches_multiple_runs() {
+		_prime_post_parent_id_caches( self::$posts );
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( self::$posts );
+		_prime_post_parent_id_caches( self::$posts );
 		$num_queries = get_num_queries() - $before_num_queries;
 
 		$this->assertSame( 0, $num_queries, 'Unexpected number of queries.' );
@@ -72,7 +72,7 @@ class Tests_Post_PrimePostParentsCaches extends WP_UnitTestCase {
 	/**
 	 * @ticket 59188
 	 */
-	public function test_prime_post_parents_caches_update() {
+	public function test_prime_post_parent_id_caches_update() {
 		$page_id            = self::factory()->post->create(
 			array(
 				'post_type'   => 'page',
@@ -80,7 +80,7 @@ class Tests_Post_PrimePostParentsCaches extends WP_UnitTestCase {
 			)
 		);
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( array( $page_id ) );
+		_prime_post_parent_id_caches( array( $page_id ) );
 		$num_queries = get_num_queries() - $before_num_queries;
 
 		$this->assertSame( 1, $num_queries, 'Unexpected number of queries on first run' );
@@ -94,7 +94,7 @@ class Tests_Post_PrimePostParentsCaches extends WP_UnitTestCase {
 		);
 
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( array( $page_id ) );
+		_prime_post_parent_id_caches( array( $page_id ) );
 		$num_queries = get_num_queries() - $before_num_queries;
 
 		$this->assertSame( 1, $num_queries, 'Unexpected number of queries on second run' );
@@ -104,7 +104,7 @@ class Tests_Post_PrimePostParentsCaches extends WP_UnitTestCase {
 	/**
 	 * @ticket 59188
 	 */
-	public function test_prime_post_parents_caches_delete() {
+	public function test_prime_post_parent_id_caches_delete() {
 		$parent_page_id     = self::factory()->post->create(
 			array(
 				'post_type' => 'page',
@@ -117,7 +117,7 @@ class Tests_Post_PrimePostParentsCaches extends WP_UnitTestCase {
 			)
 		);
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( array( $page_id ) );
+		_prime_post_parent_id_caches( array( $page_id ) );
 		$num_queries = get_num_queries() - $before_num_queries;
 
 		$this->assertSame( 1, $num_queries, 'Unexpected number of queries on first run' );