diff --git a/tests/phpunit/tests/rest-api/rest-global-styles-revisions-controller.php b/tests/phpunit/tests/rest-api/rest-global-styles-revisions-controller.php
index b01ada9be28ff..ab9f980c9ee63 100644
--- a/tests/phpunit/tests/rest-api/rest-global-styles-revisions-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-global-styles-revisions-controller.php
@@ -245,17 +245,33 @@ public function test_register_routes() {
 	}
 
 	/**
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 58524
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_items
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_items_missing_parent() {
+	public function test_get_items_missing_parent( $method ) {
 		wp_set_current_user( self::$admin_id );
-		$request  = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . REST_TESTS_IMPOSSIBLY_HIGH_NUMBER . '/revisions' );
+		$request  = new WP_REST_Request( $method, '/wp/v2/global-styles/' . REST_TESTS_IMPOSSIBLY_HIGH_NUMBER . '/revisions' );
 		$response = rest_get_server()->dispatch( $request );
 		$this->assertErrorResponse( 'rest_post_invalid_parent', $response, 404 );
 	}
 
+	/**
+	 * Data provider intended to provide HTTP method names for testing GET and HEAD requests.
+	 *
+	 * @return array
+	 */
+	public static function data_readable_http_methods() {
+		return array(
+			'GET request'  => array( 'GET' ),
+			'HEAD request' => array( 'HEAD' ),
+		);
+	}
+
 	/**
 	 * Utility function to check the items in WP_REST_Global_Styles_Controller::get_items
 	 * against the expected values.
@@ -327,16 +343,20 @@ public function test_get_item() {
 	}
 
 	/**
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 59810
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_revision
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_item_invalid_revision_id_should_error() {
+	public function test_get_item_invalid_revision_id_should_error( $method ) {
 		wp_set_current_user( self::$admin_id );
 
 		$expected_error  = 'rest_post_invalid_id';
 		$expected_status = 404;
-		$request         = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions/20000001' );
+		$request         = new WP_REST_Request( $method, '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions/20000001' );
 		$response        = rest_get_server()->dispatch( $request );
 
 		$this->assertErrorResponse( $expected_error, $response, $expected_status );
@@ -419,14 +439,18 @@ public function test_get_item_schema() {
 	}
 
 	/**
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 58524
 	 * @ticket 60131
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_item_permissions_check
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_item_permissions_check() {
+	public function test_get_item_permissions_check( $method ) {
 		wp_set_current_user( self::$author_id );
-		$request  = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
+		$request  = new WP_REST_Request( $method, '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
 		$response = rest_get_server()->dispatch( $request );
 
 		$this->assertErrorResponse( 'rest_cannot_read', $response, 403 );
@@ -435,13 +459,15 @@ public function test_get_item_permissions_check() {
 	/**
 	 * Tests the pagination header of the first page.
 	 *
-	 * Duplicate of WP_Test_REST_Revisions_Controller::test_get_items_pagination_header_of_the_first_page
-	 *
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 58524
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_items
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_items_pagination_header_of_the_first_page() {
+	public function test_get_items_pagination_header_of_the_first_page( $method ) {
 		wp_set_current_user( self::$admin_id );
 
 		$rest_route  = '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions';
@@ -449,7 +475,7 @@ public function test_get_items_pagination_header_of_the_first_page() {
 		$total_pages = (int) ceil( $this->total_revisions / $per_page );
 		$page        = 1;  // First page.
 
-		$request = new WP_REST_Request( 'GET', $rest_route );
+		$request = new WP_REST_Request( $method, $rest_route );
 		$request->set_query_params(
 			array(
 				'per_page' => $per_page,
@@ -476,11 +502,15 @@ public function test_get_items_pagination_header_of_the_first_page() {
 	 *
 	 * Duplicate of WP_Test_REST_Revisions_Controller::test_get_items_pagination_header_of_the_last_page
 	 *
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 58524
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_items
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_items_pagination_header_of_the_last_page() {
+	public function test_get_items_pagination_header_of_the_last_page( $method ) {
 		wp_set_current_user( self::$admin_id );
 
 		$rest_route  = '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions';
@@ -488,7 +518,7 @@ public function test_get_items_pagination_header_of_the_last_page() {
 		$total_pages = (int) ceil( $this->total_revisions / $per_page );
 		$page        = 2;  // Last page.
 
-		$request = new WP_REST_Request( 'GET', $rest_route );
+		$request = new WP_REST_Request( $method, $rest_route );
 		$request->set_query_params(
 			array(
 				'per_page' => $per_page,
@@ -514,18 +544,22 @@ public function test_get_items_pagination_header_of_the_last_page() {
 	 *
 	 * Duplicate of WP_Test_REST_Revisions_Controller::test_get_items_invalid_per_page_should_error
 	 *
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 58524
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_items
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_items_invalid_per_page_should_error() {
+	public function test_get_items_invalid_per_page_should_error( $method ) {
 		wp_set_current_user( self::$admin_id );
 
 		$per_page        = -1; // Invalid number.
 		$expected_error  = 'rest_invalid_param';
 		$expected_status = 400;
 
-		$request = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
+		$request = new WP_REST_Request( $method, '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
 		$request->set_param( 'per_page', $per_page );
 		$response = rest_get_server()->dispatch( $request );
 		$this->assertErrorResponse( $expected_error, $response, $expected_status );
@@ -536,11 +570,15 @@ public function test_get_items_invalid_per_page_should_error() {
 	 *
 	 * Duplicate of WP_Test_REST_Revisions_Controller::test_get_items_out_of_bounds_page_should_error
 	 *
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 58524
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_items
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_items_out_of_bounds_page_should_error() {
+	public function test_get_items_out_of_bounds_page_should_error( $method ) {
 		wp_set_current_user( self::$admin_id );
 
 		$per_page        = 2;
@@ -549,7 +587,7 @@ public function test_get_items_out_of_bounds_page_should_error() {
 		$expected_error  = 'rest_revision_invalid_page_number';
 		$expected_status = 400;
 
-		$request = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
+		$request = new WP_REST_Request( $method, '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
 		$request->set_query_params(
 			array(
 				'per_page' => $per_page,
@@ -565,11 +603,15 @@ public function test_get_items_out_of_bounds_page_should_error() {
 	 *
 	 * Duplicate of WP_Test_REST_Revisions_Controller::test_get_items_invalid_max_pages_should_error
 	 *
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 58524
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_items
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_items_invalid_max_pages_should_error() {
+	public function test_get_items_invalid_max_pages_should_error( $method ) {
 		wp_set_current_user( self::$admin_id );
 
 		$per_page        = 2;
@@ -577,7 +619,7 @@ public function test_get_items_invalid_max_pages_should_error() {
 		$expected_error  = 'rest_revision_invalid_page_number';
 		$expected_status = 400;
 
-		$request = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
+		$request = new WP_REST_Request( $method, '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
 		$request->set_query_params(
 			array(
 				'per_page' => $per_page,
@@ -689,11 +731,15 @@ public function test_get_items_offset_should_take_priority_over_page() {
 	 *
 	 * Duplicate of WP_Test_REST_Revisions_Controller::test_get_items_total_revisions_offset_should_return_empty_data
 	 *
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 58524
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_items
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_items_total_revisions_offset_should_return_empty_data() {
+	public function test_get_items_total_revisions_offset_should_return_empty_data( $method ) {
 		wp_set_current_user( self::$admin_id );
 
 		$per_page        = 2;
@@ -701,7 +747,7 @@ public function test_get_items_total_revisions_offset_should_return_empty_data()
 		$expected_error  = 'rest_revision_invalid_offset_number';
 		$expected_status = 400;
 
-		$request = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
+		$request = new WP_REST_Request( $method, '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
 		$request->set_query_params(
 			array(
 				'offset'   => $offset,
@@ -717,11 +763,15 @@ public function test_get_items_total_revisions_offset_should_return_empty_data()
 	 *
 	 * Duplicate of WP_Test_REST_Revisions_Controller::test_get_items_out_of_bound_offset_should_error
 	 *
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 58524
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_items
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_items_out_of_bound_offset_should_error() {
+	public function test_get_items_out_of_bound_offset_should_error( $method ) {
 		wp_set_current_user( self::$admin_id );
 
 		$per_page        = 2;
@@ -729,7 +779,7 @@ public function test_get_items_out_of_bound_offset_should_error() {
 		$expected_error  = 'rest_revision_invalid_offset_number';
 		$expected_status = 400;
 
-		$request = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
+		$request = new WP_REST_Request( $method, '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
 		$request->set_query_params(
 			array(
 				'offset'   => $offset,
@@ -745,11 +795,15 @@ public function test_get_items_out_of_bound_offset_should_error() {
 	 *
 	 * Duplicate of WP_Test_REST_Revisions_Controller::test_get_items_impossible_high_number_offset_should_error
 	 *
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 58524
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_items
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_items_impossible_high_number_offset_should_error() {
+	public function test_get_items_impossible_high_number_offset_should_error( $method ) {
 		wp_set_current_user( self::$admin_id );
 
 		$per_page        = 2;
@@ -757,7 +811,7 @@ public function test_get_items_impossible_high_number_offset_should_error() {
 		$expected_error  = 'rest_revision_invalid_offset_number';
 		$expected_status = 400;
 
-		$request = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
+		$request = new WP_REST_Request( $method, '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
 		$request->set_query_params(
 			array(
 				'offset'   => $offset,
@@ -773,11 +827,15 @@ public function test_get_items_impossible_high_number_offset_should_error() {
 	 *
 	 * Duplicate of WP_Test_REST_Revisions_Controller::test_get_items_invalid_offset_should_error
 	 *
+	 * @dataProvider data_readable_http_methods
 	 * @ticket 58524
+	 * @ticket 56481
 	 *
 	 * @covers WP_REST_Global_Styles_Controller::get_items
+	 *
+	 * @param string $method The HTTP method to use.
 	 */
-	public function test_get_items_invalid_offset_should_error() {
+	public function test_get_items_invalid_offset_should_error( $method ) {
 		wp_set_current_user( self::$admin_id );
 
 		$per_page        = 2;
@@ -785,7 +843,7 @@ public function test_get_items_invalid_offset_should_error() {
 		$expected_error  = 'rest_invalid_param';
 		$expected_status = 400;
 
-		$request = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
+		$request = new WP_REST_Request( $method, '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
 		$request->set_query_params(
 			array(
 				'offset'   => $offset,