Index: src/wp-includes/template.php
===================================================================
--- src/wp-includes/template.php	(revision 34780)
+++ src/wp-includes/template.php	(working copy)
@@ -380,6 +380,7 @@
  * e.g. 'single_template'.
  *
  * @since 1.5.0
+ * @since 4.4.0 `single-{post_type}-{post_name}.php` was added to the top of the template hierarchy.
  *
  * @see get_query_template()
  *
@@ -390,8 +391,11 @@
 
 	$templates = array();
 
-	if ( ! empty( $object->post_type ) )
+	if ( ! empty( $object->post_type ) ) {
+		$templates[] = "single-{$object->post_type}-{$object->post_name}.php";
 		$templates[] = "single-{$object->post_type}.php";
+	}
+
 	$templates[] = "single.php";
 
 	return get_query_template( 'single', $templates );