diff --git a/phpunit/bootstrap.php b/phpunit/bootstrap.php
index acc7cfde89dbd..295d02978f120 100644
--- a/phpunit/bootstrap.php
+++ b/phpunit/bootstrap.php
@@ -101,91 +101,6 @@ function fail_if_died( $message ) {
 // Enable the widget block editor.
 tests_add_filter( 'gutenberg_use_widgets_block_editor', '__return_true' );
 
-/**
- * Register test block prior to theme.json generating metadata.
- *
- * This new block is used to test experimental selectors. It is registered
- * via `tests_add_filter()` here during bootstrapping so that it occurs prior
- * to theme.json generating block metadata. Once a core block, such as Image,
- * uses feature level selectors we could remove this in favour of testing via
- * the core block.
- */
-function gutenberg_register_test_block_for_feature_selectors() {
-	WP_Block_Type_Registry::get_instance()->register(
-		'test/test',
-		array(
-			'api_version' => 3,
-			'attributes'  => array(
-				'textColor' => array(
-					'type' => 'string',
-				),
-				'style'     => array(
-					'type' => 'object',
-				),
-			),
-			'supports'    => array(
-				'__experimentalBorder'   => array(
-					'radius'                 => true,
-					'__experimentalSelector' => '.inner',
-				),
-				'color'                  => array(
-					'text' => true,
-				),
-				'spacing'                => array(
-					'padding'                => true,
-					'__experimentalSelector' => '.inner',
-				),
-				'typography'             => array(
-					'fontSize'               => true,
-					'__experimentalSelector' => '.sub-heading',
-				),
-				'__experimentalSelector' => '.wp-block-test, .wp-block-test__wrapper',
-			),
-		)
-	);
-
-	WP_Block_Type_Registry::get_instance()->register(
-		'my/block-with-selectors',
-		array(
-			'api_version' => 2,
-			'attributes'  => array(
-				'textColor' => array(
-					'type' => 'string',
-				),
-				'style'     => array(
-					'type' => 'object',
-				),
-			),
-			'supports'    => array(
-				'__experimentalBorder' => array(
-					'radius' => true,
-				),
-				'color'                => array(
-					'background' => true,
-					'text'       => true,
-				),
-				'spacing'              => array(
-					'padding' => true,
-				),
-				'typography'           => array(
-					'fontSize' => true,
-				),
-			),
-			'selectors'   => array(
-				'root'       => '.custom-root-selector',
-				'border'     => array(
-					'root' => '.custom-root-selector img',
-				),
-				'color'      => array(
-					'text' => '.custom-root-selector > figcaption',
-				),
-				'typography' => '.custom-root-selector > figcaption',
-			),
-		)
-	);
-}
-tests_add_filter( 'init', 'gutenberg_register_test_block_for_feature_selectors' );
-
 // Start up the WP testing environment.
 require $_tests_dir . '/includes/bootstrap.php';
 
diff --git a/phpunit/class-wp-theme-json-test.php b/phpunit/class-wp-theme-json-test.php
index 59dcf07c040b5..cb4d5458111c6 100644
--- a/phpunit/class-wp-theme-json-test.php
+++ b/phpunit/class-wp-theme-json-test.php
@@ -562,7 +562,7 @@ public function test_get_stylesheet() {
 		$this->assertSame( $all, $theme_json->get_stylesheet() );
 	}
 
-	public function test_get_stylesheet_support_for_shorthand_and_longhand_values() {
+	public function test_get_styles_for_block_support_for_shorthand_and_longhand_values() {
 		$theme_json = new WP_Theme_JSON_Gutenberg(
 			array(
 				'version' => WP_Theme_JSON_Gutenberg::LATEST_SCHEMA,
@@ -598,9 +598,28 @@ public function test_get_stylesheet_support_for_shorthand_and_longhand_values()
 			)
 		);
 
-		$styles = static::$base_styles . ':root :where(.wp-block-group){border-radius: 10px;margin: 1em;padding: 24px;}:root :where(.wp-block-image){margin-bottom: 30px;padding-top: 15px;}:root :where(.wp-block-image img, .wp-block-image .wp-block-image__crop-area, .wp-block-image .components-placeholder){border-top-left-radius: 10px;border-bottom-right-radius: 1em;}';
-		$this->assertSame( $styles, $theme_json->get_stylesheet() );
-		$this->assertSame( $styles, $theme_json->get_stylesheet( array( 'styles' ) ) );
+		$group_node = array(
+			'name'      => 'core/group',
+			'path'      => array( 'styles', 'blocks', 'core/group' ),
+			'selector'  => '.wp-block-group',
+			'selectors' => array(
+				'root' => '.wp-block-group',
+			),
+		);
+		$image_node = array(
+			'name'      => 'core/image',
+			'path'      => array( 'styles', 'blocks', 'core/image' ),
+			'selector'  => '.wp-block-image',
+			'selectors' => array(
+				'root'   => '.wp-block-image',
+				'border' => '.wp-block-image img, .wp-block-image .wp-block-image__crop-area, .wp-block-image .components-placeholder',
+			),
+		);
+
+		$group_styles = ':root :where(.wp-block-group){border-radius: 10px;margin: 1em;padding: 24px;}';
+		$image_styles = ':root :where(.wp-block-image){margin-bottom: 30px;padding-top: 15px;}:root :where(.wp-block-image img, .wp-block-image .wp-block-image__crop-area, .wp-block-image .components-placeholder){border-top-left-radius: 10px;border-bottom-right-radius: 1em;}';
+		$this->assertSame( $group_styles, $theme_json->get_styles_for_block( $group_node ) );
+		$this->assertSame( $image_styles, $theme_json->get_styles_for_block( $image_node ) );
 	}
 
 	public function test_get_stylesheet_skips_disabled_protected_properties() {
@@ -711,14 +730,14 @@ public function test_get_stylesheet_preset_rules_come_after_block_rules() {
 			)
 		);
 
-		$styles    = static::$base_styles . ':root :where(.wp-block-group){color: red;}';
+		$styles    = ':root :where(.wp-block-group){color: red;}';
 		$presets   = '.wp-block-group.has-grey-color{color: var(--wp--preset--color--grey) !important;}.wp-block-group.has-grey-background-color{background-color: var(--wp--preset--color--grey) !important;}.wp-block-group.has-grey-border-color{border-color: var(--wp--preset--color--grey) !important;}';
 		$variables = '.wp-block-group{--wp--preset--color--grey: grey;}';
 
 		$all = $variables . $styles . $presets;
 
-		$this->assertSame( $all, $theme_json->get_stylesheet() );
-		$this->assertSame( $styles, $theme_json->get_stylesheet( array( 'styles' ) ) );
+		$this->assertSame( $all, $theme_json->get_stylesheet( array( 'styles', 'presets', 'variables' ), null, array( 'skip_root_layout_styles' => true ) ) );
+		$this->assertSame( $styles, $theme_json->get_stylesheet( array( 'styles' ), null, array( 'skip_root_layout_styles' => true ) ) );
 		$this->assertSame( $presets, $theme_json->get_stylesheet( array( 'presets' ) ) );
 		$this->assertSame( $variables, $theme_json->get_stylesheet( array( 'variables' ) ) );
 	}
@@ -765,45 +784,7 @@ public function test_get_stylesheet_generates_proper_classes_and_css_vars_from_s
 		);
 	}
 
-	public function test_get_stylesheet_preset_values_are_marked_as_important() {
-		$theme_json = new WP_Theme_JSON_Gutenberg(
-			array(
-				'version'  => WP_Theme_JSON_Gutenberg::LATEST_SCHEMA,
-				'settings' => array(
-					'color' => array(
-						'palette' => array(
-							array(
-								'slug'  => 'grey',
-								'color' => 'grey',
-							),
-						),
-					),
-				),
-				'styles'   => array(
-					'blocks' => array(
-						'core/paragraph' => array(
-							'color'      => array(
-								'text'       => 'red',
-								'background' => 'blue',
-							),
-							'typography' => array(
-								'fontSize'   => '12px',
-								'lineHeight' => '1.3',
-							),
-						),
-					),
-				),
-			),
-			'default'
-		);
-
-		$this->assertSame(
-			':root{--wp--preset--color--grey: grey;}' . static::$base_styles . ':root :where(p){background-color: blue;color: red;font-size: 12px;line-height: 1.3;}.has-grey-color{color: var(--wp--preset--color--grey) !important;}.has-grey-background-color{background-color: var(--wp--preset--color--grey) !important;}.has-grey-border-color{border-color: var(--wp--preset--color--grey) !important;}',
-			$theme_json->get_stylesheet()
-		);
-	}
-
-	public function test_get_stylesheet_handles_whitelisted_element_pseudo_selectors() {
+	public function test_get_styles_for_block_handles_whitelisted_element_pseudo_selectors() {
 		$theme_json = new WP_Theme_JSON_Gutenberg(
 			array(
 				'version' => WP_Theme_JSON_Gutenberg::LATEST_SCHEMA,
@@ -836,14 +817,31 @@ public function test_get_stylesheet_handles_whitelisted_element_pseudo_selectors
 			)
 		);
 
-		$element_styles = ':root :where(a:where(:not(.wp-element-button))){background-color: red;color: green;}:root :where(a:where(:not(.wp-element-button)):hover){background-color: green;color: red;font-size: 10em;text-transform: uppercase;}:root :where(a:where(:not(.wp-element-button)):focus){background-color: black;color: yellow;}';
+		$link_node  = array(
+			'path'     => array( 'styles', 'elements', 'link' ),
+			'selector' => 'a:where(:not(.wp-element-button))',
+		);
+		$hover_node = array(
+			'path'     => array( 'styles', 'elements', 'link' ),
+			'selector' => 'a:where(:not(.wp-element-button)):hover',
+		);
+		$focus_node = array(
+			'path'     => array( 'styles', 'elements', 'link' ),
+			'selector' => 'a:where(:not(.wp-element-button)):focus',
+		);
 
-		$expected = static::$base_styles . $element_styles;
+		$link_style  = ':root :where(a:where(:not(.wp-element-button))){background-color: red;color: green;}';
+		$hover_style = ':root :where(a:where(:not(.wp-element-button)):hover){background-color: green;color: red;font-size: 10em;text-transform: uppercase;}';
+		$focus_style = ':root :where(a:where(:not(.wp-element-button)):focus){background-color: black;color: yellow;}';
 
-		$this->assertSame( $expected, $theme_json->get_stylesheet() );
-		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ) ) );
+		$this->assertSame( $link_style, $theme_json->get_styles_for_block( $link_node ) );
+		$this->assertSame( $hover_style, $theme_json->get_styles_for_block( $hover_node ) );
+		$this->assertSame( $focus_style, $theme_json->get_styles_for_block( $focus_node ) );
 	}
 
+	/**
+	 * Tests that if an element has nothing but pseudo selector styles, they are still output by get_stylesheet.
+	 */
 	public function test_get_stylesheet_handles_only_pseudo_selector_rules_for_given_property() {
 		$theme_json = new WP_Theme_JSON_Gutenberg(
 			array(
@@ -873,12 +871,9 @@ public function test_get_stylesheet_handles_only_pseudo_selector_rules_for_given
 			)
 		);
 
-		$element_styles = ':root :where(a:where(:not(.wp-element-button)):hover){background-color: green;color: red;font-size: 10em;text-transform: uppercase;}:root :where(a:where(:not(.wp-element-button)):focus){background-color: black;color: yellow;}';
-
-		$expected = static::$base_styles . $element_styles;
+		$expected = ':root :where(a:where(:not(.wp-element-button)):hover){background-color: green;color: red;font-size: 10em;text-transform: uppercase;}:root :where(a:where(:not(.wp-element-button)):focus){background-color: black;color: yellow;}';
 
-		$this->assertSame( $expected, $theme_json->get_stylesheet() );
-		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ) ) );
+		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ), null, array( 'skip_root_layout_styles' => true ) ) );
 	}
 
 	public function test_get_stylesheet_ignores_pseudo_selectors_on_non_whitelisted_elements() {
@@ -910,12 +905,9 @@ public function test_get_stylesheet_ignores_pseudo_selectors_on_non_whitelisted_
 			)
 		);
 
-		$element_styles = ':root :where(h4){background-color: red;color: green;}';
-
-		$expected = static::$base_styles . $element_styles;
+		$expected = ':root :where(h4){background-color: red;color: green;}';
 
-		$this->assertSame( $expected, $theme_json->get_stylesheet() );
-		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ) ) );
+		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ), null, array( 'skip_root_layout_styles' => true ) ) );
 	}
 
 	public function test_get_stylesheet_ignores_non_whitelisted_pseudo_selectors() {
@@ -947,15 +939,16 @@ public function test_get_stylesheet_ignores_non_whitelisted_pseudo_selectors() {
 			)
 		);
 
-		$element_styles = ':root :where(a:where(:not(.wp-element-button))){background-color: red;color: green;}:root :where(a:where(:not(.wp-element-button)):hover){background-color: green;color: red;}';
-
-		$expected = static::$base_styles . $element_styles;
+		$expected = ':root :where(a:where(:not(.wp-element-button))){background-color: red;color: green;}:root :where(a:where(:not(.wp-element-button)):hover){background-color: green;color: red;}';
 
-		$this->assertSame( $expected, $theme_json->get_stylesheet() );
-		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ) ) );
+		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ), null, array( 'skip_root_layout_styles' => true ) ) );
 		$this->assertStringNotContainsString( 'a:levitate{', $theme_json->get_stylesheet( array( 'styles' ) ) );
 	}
 
+	/**
+	 * Tests that element pseudo selectors are output before block element pseudo selectors, and that whitelisted
+	 * block element pseudo selectors are output correctly.
+	 */
 	public function test_get_stylesheet_handles_priority_of_elements_vs_block_elements_pseudo_selectors() {
 		$theme_json = new WP_Theme_JSON_Gutenberg(
 			array(
@@ -993,75 +986,20 @@ public function test_get_stylesheet_handles_priority_of_elements_vs_block_elemen
 			)
 		);
 
-		$element_styles = ':root :where(.wp-block-group a:where(:not(.wp-element-button))){background-color: red;color: green;}:root :where(.wp-block-group a:where(:not(.wp-element-button)):hover){background-color: green;color: red;font-size: 10em;text-transform: uppercase;}:root :where(.wp-block-group a:where(:not(.wp-element-button)):focus){background-color: black;color: yellow;}';
-
-		$expected = static::$base_styles . $element_styles;
+		$expected = ':root :where(.wp-block-group a:where(:not(.wp-element-button))){background-color: red;color: green;}:root :where(.wp-block-group a:where(:not(.wp-element-button)):hover){background-color: green;color: red;font-size: 10em;text-transform: uppercase;}:root :where(.wp-block-group a:where(:not(.wp-element-button)):focus){background-color: black;color: yellow;}';
 
-		$this->assertSame( $expected, $theme_json->get_stylesheet() );
-		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ) ) );
-	}
-
-	public function test_get_stylesheet_handles_whitelisted_block_level_element_pseudo_selectors() {
-		$theme_json = new WP_Theme_JSON_Gutenberg(
-			array(
-				'version' => WP_Theme_JSON_Gutenberg::LATEST_SCHEMA,
-				'styles'  => array(
-					'elements' => array(
-						'link' => array(
-							'color'  => array(
-								'text'       => 'green',
-								'background' => 'red',
-							),
-							':hover' => array(
-								'color' => array(
-									'text'       => 'red',
-									'background' => 'green',
-								),
-							),
-						),
-					),
-					'blocks'   => array(
-						'core/group' => array(
-							'elements' => array(
-								'link' => array(
-									':hover' => array(
-										'color' => array(
-											'text'       => 'yellow',
-											'background' => 'black',
-										),
-									),
-								),
-							),
-						),
-					),
-				),
-			)
-		);
-
-		$element_styles = ':root :where(a:where(:not(.wp-element-button))){background-color: red;color: green;}:root :where(a:where(:not(.wp-element-button)):hover){background-color: green;color: red;}:root :where(.wp-block-group a:where(:not(.wp-element-button)):hover){background-color: black;color: yellow;}';
-
-		$expected = static::$base_styles . $element_styles;
-
-		$this->assertSame( $expected, $theme_json->get_stylesheet() );
-		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ) ) );
+		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ), null, array( 'skip_root_layout_styles' => true ) ) );
 	}
 
 	/**
-	 * This test relies on a block having already been registered prior to
-	 * theme.json generating block metadata. Until a core block, such as Image,
-	 * opts into feature level selectors, we need to register a test block.
-	 * This is achieved via `tests_add_filter()` in Gutenberg's phpunit
-	 * bootstrap. After a core block adopts feature level selectors we could
-	 * remove that filter and instead use the core block for the following test.
+	 * This test checks that feature selectors defined as `__experimentalSelector` inside
+	 * the `supports` property are correctly output in the stylesheet.
 	 */
 	public function test_get_stylesheet_with_deprecated_feature_level_selectors() {
 		$theme_json = new WP_Theme_JSON_Gutenberg(
 			array(
 				'version'  => WP_Theme_JSON_Gutenberg::LATEST_SCHEMA,
 				'settings' => array(
-					'border'     => array(
-						'radius' => true,
-					),
 					'color'      => array(
 						'custom'  => false,
 						'palette' => array(
@@ -1071,25 +1009,16 @@ public function test_get_stylesheet_with_deprecated_feature_level_selectors() {
 							),
 						),
 					),
-					'spacing'    => array(
-						'padding' => true,
-					),
 					'typography' => array(
 						'fontSize' => true,
 					),
 				),
 				'styles'   => array(
 					'blocks' => array(
-						'test/test' => array(
-							'border'     => array(
-								'radius' => '9999px',
-							),
+						'core/calendar' => array(
 							'color'      => array(
 								'text' => 'green',
 							),
-							'spacing'    => array(
-								'padding' => '20px',
-							),
 							'typography' => array(
 								'fontSize' => '3em',
 							),
@@ -1099,61 +1028,33 @@ public function test_get_stylesheet_with_deprecated_feature_level_selectors() {
 			)
 		);
 
-		$base_styles   = ':root{--wp--preset--color--green: green;}' . static::$base_styles;
-		$block_styles  = ':root :where(.wp-block-test, .wp-block-test__wrapper){color: green;}:root :where(.wp-block-test .inner, .wp-block-test__wrapper .inner){border-radius: 9999px;padding: 20px;}:root :where(.wp-block-test .sub-heading, .wp-block-test__wrapper .sub-heading){font-size: 3em;}';
+		$base_styles   = ':root{--wp--preset--color--green: green;}';
+		$block_styles  = ':root :where(.wp-block-calendar){font-size: 3em;}:root :where(.wp-block-calendar table, .wp-block-calendar th){color: green;}';
 		$preset_styles = '.has-green-color{color: var(--wp--preset--color--green) !important;}.has-green-background-color{background-color: var(--wp--preset--color--green) !important;}.has-green-border-color{border-color: var(--wp--preset--color--green) !important;}';
 		$expected      = $base_styles . $block_styles . $preset_styles;
 
-		$this->assertEquals( $expected, $theme_json->get_stylesheet() );
+		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles', 'presets', 'variables' ), null, array( 'skip_root_layout_styles' => true ) ) );
 	}
 
+
 	/**
-	 * This test relies on a block having already been registered prior to
-	 * theme.json generating block metadata. Until a core block adopts the
-	 * new selectors API, we need to register a test block.
-	 * This is achieved via `tests_add_filter()` in Gutenberg's phpunit
-	 * bootstrap. After a core block adopts feature level selectors we could
-	 * remove that filter and instead use the core block for the following test.
+	 * This test checks that feature selectors defined in the stable `selectors`
+	 * property are correctly output in the stylesheet.
 	 */
 	public function test_get_stylesheet_with_block_json_selectors() {
 		$theme_json = new WP_Theme_JSON_Gutenberg(
 			array(
 				'version'  => WP_Theme_JSON_Gutenberg::LATEST_SCHEMA,
 				'settings' => array(
-					'border'     => array(
+					'border' => array(
 						'radius' => true,
 					),
-					'color'      => array(
-						'custom'  => false,
-						'palette' => array(
-							array(
-								'slug'  => 'green',
-								'color' => 'green',
-							),
-						),
-					),
-					'spacing'    => array(
-						'padding' => true,
-					),
-					'typography' => array(
-						'fontSize' => true,
-					),
 				),
 				'styles'   => array(
 					'blocks' => array(
-						'my/block-with-selectors' => array(
-							'border'     => array(
-								'radius' => '9999px',
-							),
-							'color'      => array(
-								'background' => 'grey',
-								'text'       => 'navy',
-							),
-							'spacing'    => array(
-								'padding' => '20px',
-							),
-							'typography' => array(
-								'fontSize' => '3em',
+						'core/image' => array(
+							'border' => array(
+								'radius' => '374px',
 							),
 						),
 					),
@@ -1161,12 +1062,9 @@ public function test_get_stylesheet_with_block_json_selectors() {
 			)
 		);
 
-		$base_styles   = ':root{--wp--preset--color--green: green;}' . static::$base_styles;
-		$block_styles  = ':root :where(.custom-root-selector){background-color: grey;padding: 20px;}:root :where(.custom-root-selector img){border-radius: 9999px;}:root :where(.custom-root-selector > figcaption){color: navy;font-size: 3em;}';
-		$preset_styles = '.has-green-color{color: var(--wp--preset--color--green) !important;}.has-green-background-color{background-color: var(--wp--preset--color--green) !important;}.has-green-border-color{border-color: var(--wp--preset--color--green) !important;}';
-		$expected      = $base_styles . $block_styles . $preset_styles;
+		$expected = ':root :where(.wp-block-image img, .wp-block-image .wp-block-image__crop-area, .wp-block-image .components-placeholder){border-radius: 374px;}';
 
-		$this->assertEquals( $expected, $theme_json->get_stylesheet() );
+		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles', 'presets', 'variables' ), null, array( 'skip_root_layout_styles' => true ) ) );
 	}
 
 	public function test_get_stylesheet_generates_layout_styles() {
@@ -1262,10 +1160,6 @@ public function test_get_stylesheet_generates_base_fallback_gap_layout_styles()
 			array(
 				'version'  => WP_Theme_JSON_Gutenberg::LATEST_SCHEMA,
 				'settings' => array(
-					'layout'  => array(
-						'contentSize' => '640px',
-						'wideSize'    => '1200px',
-					),
 					'spacing' => array(
 						'blockGap' => null,
 					),
@@ -1383,10 +1277,9 @@ public function test_get_stylesheet_returns_outline_styles() {
 			)
 		);
 
-		$element_styles = ':root :where(.wp-element-button, .wp-block-button__link){outline-color: red;outline-offset: 3px;outline-style: dashed;outline-width: 3px;}:root :where(.wp-element-button:hover, .wp-block-button__link:hover){outline-color: blue;outline-offset: 3px;outline-style: solid;outline-width: 3px;}';
+		$expected = ':root :where(.wp-element-button, .wp-block-button__link){outline-color: red;outline-offset: 3px;outline-style: dashed;outline-width: 3px;}:root :where(.wp-element-button:hover, .wp-block-button__link:hover){outline-color: blue;outline-offset: 3px;outline-style: solid;outline-width: 3px;}';
 
-		$expected = static::$base_styles . $element_styles;
-		$this->assertSame( $expected, $theme_json->get_stylesheet() );
+		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ), null, array( 'skip_root_layout_styles' => true ) ) );
 	}
 
 	public function test_get_stylesheet_custom_root_selector() {
@@ -1402,13 +1295,15 @@ public function test_get_stylesheet_custom_root_selector() {
 			'default'
 		);
 
-		$options = array( 'root_selector' => '.custom' );
+		// Custom root selector is unrelated to root layout styles so they don't need to be output for this test.
+		$options = array(
+			'root_selector'           => '.custom',
+			'skip_root_layout_styles' => true,
+		);
 		$actual  = $theme_json->get_stylesheet( array( 'styles' ), null, $options );
 
-		// Results also include root site blocks styles which hard code
-		// `:where(body) { margin: 0; }`.
 		$this->assertSame(
-			':where(body) { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:root :where(.custom){color: teal;}',
+			':root :where(.custom){color: teal;}',
 			$actual
 		);
 	}
@@ -1465,10 +1360,9 @@ public function test_get_stylesheet_generates_fluid_typography_values() {
 
 		unregister_block_type( 'test/clamp-me' );
 
-		// Results also include root site blocks styles.
 		$this->assertSame(
-			':root{--wp--preset--font-size--pickles: clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.156), 16px);--wp--preset--font-size--toast: clamp(14.642px, 0.915rem + ((1vw - 3.2px) * 0.575), 22px);}:where(body) { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:where(.is-layout-flex){gap: 0.5em;}:where(.is-layout-grid){gap: 0.5em;}.is-layout-flow > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-flow > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-flow > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-constrained > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-constrained > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)){margin-left: auto !important;margin-right: auto !important;}body .is-layout-flex{display: flex;}.is-layout-flex{flex-wrap: wrap;align-items: center;}.is-layout-flex > :is(*, div){margin: 0;}body .is-layout-grid{display: grid;}.is-layout-grid > :is(*, div){margin: 0;}:root :where(body){font-size: clamp(0.875em, 0.875rem + ((1vw - 0.2em) * 0.156), 1em);}:root :where(h1){font-size: clamp(50.171px, 3.136rem + ((1vw - 3.2px) * 3.893), 100px);}:root :where(.wp-block-test-clamp-me){font-size: clamp(27.894px, 1.743rem + ((1vw - 3.2px) * 1.571), 48px);}.has-pickles-font-size{font-size: var(--wp--preset--font-size--pickles) !important;}.has-toast-font-size{font-size: var(--wp--preset--font-size--toast) !important;}',
-			$theme_json->get_stylesheet()
+			':root{--wp--preset--font-size--pickles: clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.156), 16px);--wp--preset--font-size--toast: clamp(14.642px, 0.915rem + ((1vw - 3.2px) * 0.575), 22px);}:root :where(body){font-size: clamp(0.875em, 0.875rem + ((1vw - 0.2em) * 0.156), 1em);}:root :where(h1){font-size: clamp(50.171px, 3.136rem + ((1vw - 3.2px) * 3.893), 100px);}:root :where(.wp-block-test-clamp-me){font-size: clamp(27.894px, 1.743rem + ((1vw - 3.2px) * 1.571), 48px);}.has-pickles-font-size{font-size: var(--wp--preset--font-size--pickles) !important;}.has-toast-font-size{font-size: var(--wp--preset--font-size--toast) !important;}',
+			$theme_json->get_stylesheet( array( 'styles', 'variables', 'presets' ), null, array( 'skip_root_layout_styles' => true ) )
 		);
 	}
 
@@ -3524,9 +3418,8 @@ public function test_get_property_value_valid() {
 			)
 		);
 
-		$color_styles = ':root :where(body){background-color: #ffffff;color: #000000;}:root :where(.wp-element-button, .wp-block-button__link){background-color: #000000;color: #ffffff;}';
-		$expected     = static::$base_styles . $color_styles;
-		$this->assertSame( $expected, $theme_json->get_stylesheet() );
+		$expected = ':root :where(body){background-color: #ffffff;color: #000000;}:root :where(.wp-element-button, .wp-block-button__link){background-color: #000000;color: #ffffff;}';
+		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ), null, array( 'skip_root_layout_styles' => true ) ) );
 	}
 
 	/**
@@ -3602,9 +3495,8 @@ public function test_get_property_value_loop() {
 			)
 		);
 
-		$color_styles = ':root :where(body){background-color: #ffffff;}:root :where(.wp-element-button, .wp-block-button__link){color: #ffffff;}';
-		$expected     = static::$base_styles . $color_styles;
-		$this->assertSame( $expected, $theme_json->get_stylesheet() );
+		$expected = ':root :where(body){background-color: #ffffff;}:root :where(.wp-element-button, .wp-block-button__link){color: #ffffff;}';
+		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ), null, array( 'skip_root_layout_styles' => true ) ) );
 	}
 
 	/**
@@ -3635,9 +3527,8 @@ public function test_get_property_value_recursion() {
 			)
 		);
 
-		$color_styles = ':root :where(body){background-color: #ffffff;color: #ffffff;}:root :where(.wp-element-button, .wp-block-button__link){color: #ffffff;}';
-		$expected     = static::$base_styles . $color_styles;
-		$this->assertSame( $expected, $theme_json->get_stylesheet() );
+		$expected = ':root :where(body){background-color: #ffffff;color: #ffffff;}:root :where(.wp-element-button, .wp-block-button__link){color: #ffffff;}';
+		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ), null, array( 'skip_root_layout_styles' => true ) ) );
 	}
 
 	/**
@@ -3659,9 +3550,8 @@ public function test_get_property_value_self() {
 			)
 		);
 
-		$color_styles = ':root :where(body){background-color: #ffffff;}';
-		$expected     = static::$base_styles . $color_styles;
-		$this->assertSame( $expected, $theme_json->get_stylesheet() );
+		$expected = ':root :where(body){background-color: #ffffff;}';
+		$this->assertSame( $expected, $theme_json->get_stylesheet( array( 'styles' ), null, array( 'skip_root_layout_styles' => true ) ) );
 	}
 
 	public function test_get_styles_for_block_with_padding_aware_alignments() {
@@ -3723,7 +3613,7 @@ public function test_get_styles_for_block_without_padding_aware_alignments() {
 		$this->assertSame( $expected, $root_rules . $style_rules );
 	}
 
-	public function test_get_styles_for_block_with_content_width() {
+	public function test_get_styles_with_content_width() {
 		$theme_json = new WP_Theme_JSON_Gutenberg(
 			array(
 				'version'  => WP_Theme_JSON_Gutenberg::LATEST_SCHEMA,
@@ -3741,10 +3631,8 @@ public function test_get_styles_for_block_with_content_width() {
 			'selector' => 'body',
 		);
 
-		$expected    = ':root { --wp--style--global--content-size: 800px;--wp--style--global--wide-size: 1000px; }:where(body) { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:where(.is-layout-flex){gap: 0.5em;}:where(.is-layout-grid){gap: 0.5em;}.is-layout-flow > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-flow > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-flow > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-constrained > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-constrained > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)){max-width: var(--wp--style--global--content-size);margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignwide{max-width: var(--wp--style--global--wide-size);}body .is-layout-flex{display: flex;}.is-layout-flex{flex-wrap: wrap;align-items: center;}.is-layout-flex > :is(*, div){margin: 0;}body .is-layout-grid{display: grid;}.is-layout-grid > :is(*, div){margin: 0;}';
-		$root_rules  = $theme_json->get_root_layout_rules( WP_Theme_JSON_Gutenberg::ROOT_BLOCK_SELECTOR, $metadata );
-		$style_rules = $theme_json->get_styles_for_block( $metadata );
-		$this->assertSame( $expected, $root_rules . $style_rules );
+		$expected = ':root { --wp--style--global--content-size: 800px;--wp--style--global--wide-size: 1000px; }:where(body) { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:where(.is-layout-flex){gap: 0.5em;}:where(.is-layout-grid){gap: 0.5em;}.is-layout-flow > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-flow > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-flow > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-constrained > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-constrained > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)){max-width: var(--wp--style--global--content-size);margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignwide{max-width: var(--wp--style--global--wide-size);}body .is-layout-flex{display: flex;}.is-layout-flex{flex-wrap: wrap;align-items: center;}.is-layout-flex > :is(*, div){margin: 0;}body .is-layout-grid{display: grid;}.is-layout-grid > :is(*, div){margin: 0;}';
+		$this->assertSame( $expected, $theme_json->get_root_layout_rules( WP_Theme_JSON::ROOT_BLOCK_SELECTOR, $metadata ) );
 	}
 
 	public function test_get_styles_with_appearance_tools() {
@@ -3762,9 +3650,8 @@ public function test_get_styles_with_appearance_tools() {
 			'selector' => 'body',
 		);
 
-		$expected   = ':where(body) { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:where(.wp-site-blocks) > * { margin-block-start: ; margin-block-end: 0; }:where(.wp-site-blocks) > :first-child { margin-block-start: 0; }:where(.wp-site-blocks) > :last-child { margin-block-end: 0; }:root { --wp--style--block-gap: ; }.is-layout-flow  > :first-child{margin-block-start: 0;}.is-layout-flow  > :last-child{margin-block-end: 0;}.is-layout-flow  > *{margin-block-start: 1;margin-block-end: 0;}.is-layout-constrained  > :first-child{margin-block-start: 0;}.is-layout-constrained  > :last-child{margin-block-end: 0;}.is-layout-constrained  > *{margin-block-start: 1;margin-block-end: 0;}.is-layout-flex {gap: 1;}.is-layout-grid {gap: 1;}.is-layout-flow > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-flow > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-flow > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-constrained > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-constrained > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)){margin-left: auto !important;margin-right: auto !important;}body .is-layout-flex{display: flex;}.is-layout-flex{flex-wrap: wrap;align-items: center;}.is-layout-flex > :is(*, div){margin: 0;}body .is-layout-grid{display: grid;}.is-layout-grid > :is(*, div){margin: 0;}';
-		$root_rules = $theme_json->get_root_layout_rules( WP_Theme_JSON_Gutenberg::ROOT_BLOCK_SELECTOR, $metadata );
-		$this->assertSame( $expected, $root_rules );
+		$expected = ':where(body) { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:where(.wp-site-blocks) > * { margin-block-start: ; margin-block-end: 0; }:where(.wp-site-blocks) > :first-child { margin-block-start: 0; }:where(.wp-site-blocks) > :last-child { margin-block-end: 0; }:root { --wp--style--block-gap: ; }.is-layout-flow  > :first-child{margin-block-start: 0;}.is-layout-flow  > :last-child{margin-block-end: 0;}.is-layout-flow  > *{margin-block-start: 1;margin-block-end: 0;}.is-layout-constrained  > :first-child{margin-block-start: 0;}.is-layout-constrained  > :last-child{margin-block-end: 0;}.is-layout-constrained  > *{margin-block-start: 1;margin-block-end: 0;}.is-layout-flex {gap: 1;}.is-layout-grid {gap: 1;}.is-layout-flow > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-flow > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-flow > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-constrained > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-constrained > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)){margin-left: auto !important;margin-right: auto !important;}body .is-layout-flex{display: flex;}.is-layout-flex{flex-wrap: wrap;align-items: center;}.is-layout-flex > :is(*, div){margin: 0;}body .is-layout-grid{display: grid;}.is-layout-grid > :is(*, div){margin: 0;}';
+		$this->assertSame( $expected, $theme_json->get_root_layout_rules( WP_Theme_JSON_Gutenberg::ROOT_BLOCK_SELECTOR, $metadata ) );
 	}
 
 	public function test_sanitization() {
@@ -4643,7 +4530,6 @@ public function data_set_spacing_sizes_when_invalid() {
 	 * @param array $expected_output          Expected output from data provider.
 	 */
 	public function test_update_separator_declarations( $separator_block_settings, $expected_output ) {
-		// If only background is defined, test that includes border-color to the style so it is applied on the front end.
 		$theme_json = new WP_Theme_JSON_Gutenberg(
 			array(
 				'version' => WP_Theme_JSON_Gutenberg::LATEST_SCHEMA,
@@ -4656,9 +4542,11 @@ public function test_update_separator_declarations( $separator_block_settings, $
 			'default'
 		);
 
-		$stylesheet = $theme_json->get_stylesheet( array( 'styles' ) );
-
-		$this->assertSame( $expected_output, $stylesheet );
+		$separator_node = array(
+			'path'     => array( 'styles', 'blocks', 'core/separator' ),
+			'selector' => '.wp-block-separator',
+		);
+		$this->assertSame( $expected_output, $theme_json->get_styles_for_block( $separator_node ) );
 	}
 
 	/**
@@ -4675,7 +4563,7 @@ public function data_update_separator_declarations() {
 						'background' => 'blue',
 					),
 				),
-				'expected_output' => static::$base_styles . ':root :where(.wp-block-separator){background-color: blue;color: blue;}',
+				'expected_output' => ':root :where(.wp-block-separator){background-color: blue;color: blue;}',
 			),
 			// If background and text are defined, do not include border-color, as text color is enough.
 			'background and text, no border-color' => array(
@@ -4685,7 +4573,7 @@ public function data_update_separator_declarations() {
 						'text'       => 'red',
 					),
 				),
-				'expected_output' => static::$base_styles . ':root :where(.wp-block-separator){background-color: blue;color: red;}',
+				'expected_output' => ':root :where(.wp-block-separator){background-color: blue;color: red;}',
 			),
 			// If only text is defined, do not include border-color, as by itself is enough.
 			'only text'                            => array(
@@ -4694,7 +4582,7 @@ public function data_update_separator_declarations() {
 						'text' => 'red',
 					),
 				),
-				'expected_output' => static::$base_styles . ':root :where(.wp-block-separator){color: red;}',
+				'expected_output' => ':root :where(.wp-block-separator){color: red;}',
 			),
 			// If background, text, and border-color are defined, include everything, CSS specificity will decide which to apply.
 			'background, text, and border-color'   => array(
@@ -4707,7 +4595,7 @@ public function data_update_separator_declarations() {
 						'color' => 'pink',
 					),
 				),
-				'expected_output' => static::$base_styles . ':root :where(.wp-block-separator){background-color: blue;border-color: pink;color: red;}',
+				'expected_output' => ':root :where(.wp-block-separator){background-color: blue;border-color: pink;color: red;}',
 			),
 			// If background and border color are defined, include everything, CSS specificity will decide which to apply.
 			'background, and border-color'         => array(
@@ -4719,7 +4607,7 @@ public function data_update_separator_declarations() {
 						'color' => 'pink',
 					),
 				),
-				'expected_output' => static::$base_styles . ':root :where(.wp-block-separator){background-color: blue;border-color: pink;}',
+				'expected_output' => ':root :where(.wp-block-separator){background-color: blue;border-color: pink;}',
 			),
 		);
 	}
@@ -4782,10 +4670,10 @@ public function test_get_shadow_styles_for_blocks() {
 			)
 		);
 
-		$global_styles   = ':root{--wp--preset--shadow--natural: 5px 5px 0 0 black;}' . static::$base_styles;
+		$variable_styles = ':root{--wp--preset--shadow--natural: 5px 5px 0 0 black;}';
 		$element_styles  = ':root :where(a:where(:not(.wp-element-button))){box-shadow: var(--wp--preset--shadow--natural);}:root :where(.wp-element-button, .wp-block-button__link){box-shadow: var(--wp--preset--shadow--natural);}:root :where(p){box-shadow: var(--wp--preset--shadow--natural);}';
-		$expected_styles = $global_styles . $element_styles;
-		$this->assertSame( $expected_styles, $theme_json->get_stylesheet() );
+		$expected_styles = $variable_styles . $element_styles;
+		$this->assertSame( $expected_styles, $theme_json->get_stylesheet( array( 'styles', 'presets', 'variables' ), null, array( 'skip_root_layout_styles' => true ) ) );
 	}
 
 	public function test_get_top_level_background_image_styles() {
@@ -4801,36 +4689,17 @@ public function test_get_top_level_background_image_styles() {
 						'backgroundRepeat'   => 'no-repeat',
 						'backgroundPosition' => 'center center',
 					),
-					'blocks'     => array(
-						'core/paragraph' => array(
-							'background' => array(
-								'backgroundImage'    => array(
-									'url' => 'http://example.org/image.png',
-								),
-								'backgroundSize'     => 'cover',
-								'backgroundRepeat'   => 'no-repeat',
-								'backgroundPosition' => 'center center',
-							),
-						),
-					),
-					'elements'   => array(
-						'button' => array(
-							'background' => array(
-								'backgroundImage'    => array(
-									'url' => 'http://example.org/image.png',
-								),
-								'backgroundSize'     => 'cover',
-								'backgroundRepeat'   => 'no-repeat',
-								'backgroundPosition' => 'center center',
-							),
-						),
-					),
 				),
 			)
 		);
 
-		$expected_styles = ":where(body) { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:where(.is-layout-flex){gap: 0.5em;}:where(.is-layout-grid){gap: 0.5em;}.is-layout-flow > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-flow > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-flow > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-constrained > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-constrained > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)){margin-left: auto !important;margin-right: auto !important;}body .is-layout-flex{display: flex;}.is-layout-flex{flex-wrap: wrap;align-items: center;}.is-layout-flex > :is(*, div){margin: 0;}body .is-layout-grid{display: grid;}.is-layout-grid > :is(*, div){margin: 0;}html{min-height: calc(100% - var(--wp-admin--admin-bar--height, 0px));}:root :where(body){background-image: url('http://example.org/image.png');background-position: center center;background-repeat: no-repeat;background-size: contain;}";
-		$this->assertSame( $expected_styles, $theme_json->get_stylesheet(), 'Styles returned from "::get_stylesheet()" with top-level background styles type does not match expectations' );
+		$body_node = array(
+			'path'     => array( 'styles' ),
+			'selector' => 'body',
+		);
+
+		$expected_styles = "html{min-height: calc(100% - var(--wp-admin--admin-bar--height, 0px));}:root :where(body){background-image: url('http://example.org/image.png');background-position: center center;background-repeat: no-repeat;background-size: contain;}";
+		$this->assertSame( $expected_styles, $theme_json->get_styles_for_block( $body_node ), 'Styles returned from "::get_styles_for_block()" with top-level background styles type does not match expectations' );
 
 		$theme_json = new WP_Theme_JSON_Gutenberg(
 			array(
@@ -4846,8 +4715,8 @@ public function test_get_top_level_background_image_styles() {
 			)
 		);
 
-		$expected_styles = ":where(body) { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:where(.is-layout-flex){gap: 0.5em;}:where(.is-layout-grid){gap: 0.5em;}.is-layout-flow > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-flow > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-flow > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-constrained > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-constrained > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)){margin-left: auto !important;margin-right: auto !important;}body .is-layout-flex{display: flex;}.is-layout-flex{flex-wrap: wrap;align-items: center;}.is-layout-flex > :is(*, div){margin: 0;}body .is-layout-grid{display: grid;}.is-layout-grid > :is(*, div){margin: 0;}html{min-height: calc(100% - var(--wp-admin--admin-bar--height, 0px));}:root :where(body){background-image: url('http://example.org/image.png');background-position: center center;background-repeat: no-repeat;background-size: contain;}";
-		$this->assertSame( $expected_styles, $theme_json->get_stylesheet(), 'Styles returned from "::get_stylesheet()" with top-level background image as string type does not match expectations' );
+		$expected_styles = "html{min-height: calc(100% - var(--wp-admin--admin-bar--height, 0px));}:root :where(body){background-image: url('http://example.org/image.png');background-position: center center;background-repeat: no-repeat;background-size: contain;}";
+		$this->assertSame( $expected_styles, $theme_json->get_styles_for_block( $body_node ), 'Styles returned from "::get_styles_for_block()" with top-level background image as string type does not match expectations' );
 	}
 
 	/**