diff --git a/src/wp-includes/html-api/class-wp-html-processor.php b/src/wp-includes/html-api/class-wp-html-processor.php
index a460c1161fcbb..6577c13136fd0 100644
--- a/src/wp-includes/html-api/class-wp-html-processor.php
+++ b/src/wp-includes/html-api/class-wp-html-processor.php
@@ -893,12 +893,6 @@ private function step_in_body() {
 			case 'FORM':
 			case 'FRAME':
 			case 'FRAMESET':
-			case 'H1':
-			case 'H2':
-			case 'H3':
-			case 'H4':
-			case 'H5':
-			case 'H6':
 			case 'HEAD':
 			case 'HR':
 			case 'HTML':
diff --git a/tests/phpunit/tests/html-api/wpHtmlProcessor.php b/tests/phpunit/tests/html-api/wpHtmlProcessor.php
index fe39b592cddb5..21a34490ac4d5 100644
--- a/tests/phpunit/tests/html-api/wpHtmlProcessor.php
+++ b/tests/phpunit/tests/html-api/wpHtmlProcessor.php
@@ -188,12 +188,6 @@ public function data_unsupported_special_in_body_tags() {
 			array( 'FORM' ),
 			array( 'FRAME' ),
 			array( 'FRAMESET' ),
-			array( 'H1' ),
-			array( 'H2' ),
-			array( 'H3' ),
-			array( 'H4' ),
-			array( 'H5' ),
-			array( 'H6' ),
 			array( 'HEAD' ),
 			array( 'HR' ),
 			array( 'HTML' ),