diff --git a/test/integration/fixtures/blocks/core__comments-query-loop.html b/test/integration/fixtures/blocks/core__comments-query-loop.html
index 2fbc1e0de80de2..156166ee90f9a4 100644
--- a/test/integration/fixtures/blocks/core__comments-query-loop.html
+++ b/test/integration/fixtures/blocks/core__comments-query-loop.html
@@ -1,41 +1,33 @@
 <!-- wp:comments-query-loop -->
-<div class="wp-block-comments-query-loop">
+<div class="wp-block-comments-query-loop"><!-- wp:comments-title {"level":4,"style":{"spacing":{"padding":{"top":"6px","right":"6px","bottom":"6px","left":"6px"}},"border":{"width":"3px","radius":"100px"}},"borderColor":"vivid-red","backgroundColor":"primary","textColor":"background","fontSize":"large"} /-->
+
 	<!-- wp:comment-template -->
 	<!-- wp:columns -->
-	<div class="wp-block-columns">
-		<!-- wp:column {"width":"40px"} -->
-		<div class="wp-block-column" style="flex-basis:40px">
-			<!-- wp:avatar {"size":40,"style":{"border":{"radius":"20px"}}} /-->
-		</div>
-		<!-- /wp:column -->
-
-		<!-- wp:column -->
-		<div class="wp-block-column">
-			<!-- wp:comment-author-name /-->
-
-			<!-- wp:group {"style":{"spacing":{"margin":{"top":"0px","bottom":"0px"}}},"layout":{"type":"flex"}} -->
-			<div class="wp-block-group" style="margin-top:0px;margin-bottom:0px">
-				<!-- wp:comment-date /-->
-
-				<!-- wp:comment-edit-link /-->
-			</div>
-			<!-- /wp:group -->
-
-			<!-- wp:comment-content /-->
-
-			<!-- wp:comment-reply-link /-->
-		</div>
-		<!-- /wp:column -->
-	</div>
+	<div class="wp-block-columns"><!-- wp:column {"width":"40px"} -->
+	<div class="wp-block-column" style="flex-basis:40px"><!-- wp:avatar {"size":40,"style":{"border":{"radius":"20px"}}} /--></div>
+	<!-- /wp:column -->
+	
+	<!-- wp:column -->
+	<div class="wp-block-column"><!-- wp:comment-author-name /-->
+	
+	<!-- wp:group {"style":{"spacing":{"margin":{"top":"0px","bottom":"0px"}}},"layout":{"type":"flex"}} -->
+	<div class="wp-block-group" style="margin-top:0px;margin-bottom:0px"><!-- wp:comment-date /-->
+	
+	<!-- wp:comment-edit-link /--></div>
+	<!-- /wp:group -->
+	
+	<!-- wp:comment-content /-->
+	
+	<!-- wp:comment-reply-link /--></div>
+	<!-- /wp:column --></div>
 	<!-- /wp:columns -->
 	<!-- /wp:comment-template -->
-
+	
 	<!-- wp:comments-pagination -->
 	<!-- wp:comments-pagination-previous /-->
-
+	
 	<!-- wp:comments-pagination-numbers /-->
-
+	
 	<!-- wp:comments-pagination-next /-->
-	<!-- /wp:comments-pagination -->
-</div>
-<!-- /wp:comments-query-loop -->
+	<!-- /wp:comments-pagination --></div>
+	<!-- /wp:comments-query-loop -->
\ No newline at end of file
diff --git a/test/integration/fixtures/blocks/core__comments-query-loop.json b/test/integration/fixtures/blocks/core__comments-query-loop.json
index 98e97afdb9c90a..d796d78c97ffd9 100644
--- a/test/integration/fixtures/blocks/core__comments-query-loop.json
+++ b/test/integration/fixtures/blocks/core__comments-query-loop.json
@@ -6,6 +6,34 @@
 			"tagName": "div"
 		},
 		"innerBlocks": [
+			{
+				"name": "core/comments-title",
+				"isValid": true,
+				"attributes": {
+					"showPostTitle": true,
+					"showCommentsCount": true,
+					"level": 4,
+					"borderColor": "vivid-red",
+					"backgroundColor": "primary",
+					"textColor": "background",
+					"fontSize": "large",
+					"style": {
+						"spacing": {
+							"padding": {
+								"top": "6px",
+								"right": "6px",
+								"bottom": "6px",
+								"left": "6px"
+							}
+						},
+						"border": {
+							"width": "3px",
+							"radius": "100px"
+						}
+					}
+				},
+				"innerBlocks": []
+			},
 			{
 				"name": "core/comment-template",
 				"isValid": true,
diff --git a/test/integration/fixtures/blocks/core__comments-query-loop.parsed.json b/test/integration/fixtures/blocks/core__comments-query-loop.parsed.json
index a5f207fff8388a..529336e78a0985 100644
--- a/test/integration/fixtures/blocks/core__comments-query-loop.parsed.json
+++ b/test/integration/fixtures/blocks/core__comments-query-loop.parsed.json
@@ -3,6 +3,33 @@
 		"blockName": "core/comments-query-loop",
 		"attrs": {},
 		"innerBlocks": [
+			{
+				"blockName": "core/comments-title",
+				"attrs": {
+					"level": 4,
+					"style": {
+						"spacing": {
+							"padding": {
+								"top": "6px",
+								"right": "6px",
+								"bottom": "6px",
+								"left": "6px"
+							}
+						},
+						"border": {
+							"width": "3px",
+							"radius": "100px"
+						}
+					},
+					"borderColor": "vivid-red",
+					"backgroundColor": "primary",
+					"textColor": "background",
+					"fontSize": "large"
+				},
+				"innerBlocks": [],
+				"innerHTML": "",
+				"innerContent": []
+			},
 			{
 				"blockName": "core/comment-template",
 				"attrs": {},
@@ -32,11 +59,11 @@
 										"innerContent": []
 									}
 								],
-								"innerHTML": "\n\t\t<div class=\"wp-block-column\" style=\"flex-basis:40px\">\n\t\t\t\n\t\t</div>\n\t\t",
+								"innerHTML": "\n\t<div class=\"wp-block-column\" style=\"flex-basis:40px\"></div>\n\t",
 								"innerContent": [
-									"\n\t\t<div class=\"wp-block-column\" style=\"flex-basis:40px\">\n\t\t\t",
+									"\n\t<div class=\"wp-block-column\" style=\"flex-basis:40px\">",
 									null,
-									"\n\t\t</div>\n\t\t"
+									"</div>\n\t"
 								]
 							},
 							{
@@ -81,13 +108,13 @@
 												"innerContent": []
 											}
 										],
-										"innerHTML": "\n\t\t\t<div class=\"wp-block-group\" style=\"margin-top:0px;margin-bottom:0px\">\n\t\t\t\t\n\n\t\t\t\t\n\t\t\t</div>\n\t\t\t",
+										"innerHTML": "\n\t<div class=\"wp-block-group\" style=\"margin-top:0px;margin-bottom:0px\">\n\t\n\t</div>\n\t",
 										"innerContent": [
-											"\n\t\t\t<div class=\"wp-block-group\" style=\"margin-top:0px;margin-bottom:0px\">\n\t\t\t\t",
+											"\n\t<div class=\"wp-block-group\" style=\"margin-top:0px;margin-bottom:0px\">",
 											null,
-											"\n\n\t\t\t\t",
+											"\n\t\n\t",
 											null,
-											"\n\t\t\t</div>\n\t\t\t"
+											"</div>\n\t"
 										]
 									},
 									{
@@ -105,27 +132,27 @@
 										"innerContent": []
 									}
 								],
-								"innerHTML": "\n\t\t<div class=\"wp-block-column\">\n\t\t\t\n\n\t\t\t\n\n\t\t\t\n\n\t\t\t\n\t\t</div>\n\t\t",
+								"innerHTML": "\n\t<div class=\"wp-block-column\">\n\t\n\t\n\t\n\t\n\t\n\t</div>\n\t",
 								"innerContent": [
-									"\n\t\t<div class=\"wp-block-column\">\n\t\t\t",
+									"\n\t<div class=\"wp-block-column\">",
 									null,
-									"\n\n\t\t\t",
+									"\n\t\n\t",
 									null,
-									"\n\n\t\t\t",
+									"\n\t\n\t",
 									null,
-									"\n\n\t\t\t",
+									"\n\t\n\t",
 									null,
-									"\n\t\t</div>\n\t\t"
+									"</div>\n\t"
 								]
 							}
 						],
-						"innerHTML": "\n\t<div class=\"wp-block-columns\">\n\t\t\n\n\t\t\n\t</div>\n\t",
+						"innerHTML": "\n\t<div class=\"wp-block-columns\">\n\t\n\t</div>\n\t",
 						"innerContent": [
-							"\n\t<div class=\"wp-block-columns\">\n\t\t",
+							"\n\t<div class=\"wp-block-columns\">",
 							null,
-							"\n\n\t\t",
+							"\n\t\n\t",
 							null,
-							"\n\t</div>\n\t"
+							"</div>\n\t"
 						]
 					}
 				],
@@ -158,25 +185,27 @@
 						"innerContent": []
 					}
 				],
-				"innerHTML": "\n\t\n\n\t\n\n\t\n\t",
+				"innerHTML": "\n\t\n\t\n\t\n\t\n\t\n\t",
 				"innerContent": [
 					"\n\t",
 					null,
-					"\n\n\t",
+					"\n\t\n\t",
 					null,
-					"\n\n\t",
+					"\n\t\n\t",
 					null,
 					"\n\t"
 				]
 			}
 		],
-		"innerHTML": "\n<div class=\"wp-block-comments-query-loop\">\n\t\n\n\t\n</div>\n",
+		"innerHTML": "\n<div class=\"wp-block-comments-query-loop\">\n\n\t\n\t\n\t</div>\n\t",
 		"innerContent": [
-			"\n<div class=\"wp-block-comments-query-loop\">\n\t",
+			"\n<div class=\"wp-block-comments-query-loop\">",
 			null,
 			"\n\n\t",
 			null,
-			"\n</div>\n"
+			"\n\t\n\t",
+			null,
+			"</div>\n\t"
 		]
 	}
 ]
diff --git a/test/integration/fixtures/blocks/core__comments-query-loop.serialized.html b/test/integration/fixtures/blocks/core__comments-query-loop.serialized.html
index 014b6210aaa089..dd0aa7f091628c 100644
--- a/test/integration/fixtures/blocks/core__comments-query-loop.serialized.html
+++ b/test/integration/fixtures/blocks/core__comments-query-loop.serialized.html
@@ -1,5 +1,7 @@
 <!-- wp:comments-query-loop -->
-<div class="wp-block-comments-query-loop"><!-- wp:comment-template -->
+<div class="wp-block-comments-query-loop"><!-- wp:comments-title {"level":4,"borderColor":"vivid-red","backgroundColor":"primary","textColor":"background","fontSize":"large","style":{"spacing":{"padding":{"top":"6px","right":"6px","bottom":"6px","left":"6px"}},"border":{"width":"3px","radius":"100px"}}} /-->
+
+<!-- wp:comment-template -->
 <!-- wp:columns -->
 <div class="wp-block-columns"><!-- wp:column {"width":"40px"} -->
 <div class="wp-block-column" style="flex-basis:40px"><!-- wp:avatar {"size":40,"style":{"border":{"radius":"20px"}}} /--></div>
diff --git a/test/integration/fixtures/blocks/core__comments-title.html b/test/integration/fixtures/blocks/core__comments-title.html
index 3ba9fbb36f6112..5af6be31bedfe0 100644
--- a/test/integration/fixtures/blocks/core__comments-title.html
+++ b/test/integration/fixtures/blocks/core__comments-title.html
@@ -1 +1 @@
-<!-- wp:comments-title {"style":{"typography":{"textTransform":"uppercase","fontStyle":"italic","fontWeight":"900","lineHeight":"3"}},"textColor":"vivid-purple","fontSize":"x-large","fontFamily":"source-serif-pro"} /-->
\ No newline at end of file
+<!-- wp:comments-title {"level":4,"style":{"spacing":{"padding":{"top":"6px","right":"6px","bottom":"6px","left":"6px"}},"border":{"width":"3px","radius":"100px"}},"borderColor":"vivid-red","backgroundColor":"primary","textColor":"background","fontSize":"large"} /-->
\ No newline at end of file
diff --git a/test/integration/fixtures/blocks/core__comments-title.json b/test/integration/fixtures/blocks/core__comments-title.json
index 1e7a386971f7b7..bb436b955cd9ca 100644
--- a/test/integration/fixtures/blocks/core__comments-title.json
+++ b/test/integration/fixtures/blocks/core__comments-title.json
@@ -4,15 +4,24 @@
 		"isValid": true,
 		"attributes": {
 			"showPostTitle": true,
-			"textColor": "vivid-purple",
-			"fontFamily": "source-serif-pro",
-			"fontSize": "x-large",
+			"showCommentsCount": true,
+			"level": 4,
+			"borderColor": "vivid-red",
+			"backgroundColor": "primary",
+			"textColor": "background",
+			"fontSize": "large",
 			"style": {
-				"typography": {
-					"textTransform": "uppercase",
-					"fontStyle": "italic",
-					"fontWeight": "900",
-					"lineHeight": "3"
+				"spacing": {
+					"padding": {
+						"top": "6px",
+						"right": "6px",
+						"bottom": "6px",
+						"left": "6px"
+					}
+				},
+				"border": {
+					"width": "3px",
+					"radius": "100px"
 				}
 			}
 		},
diff --git a/test/integration/fixtures/blocks/core__comments-title.parsed.json b/test/integration/fixtures/blocks/core__comments-title.parsed.json
index 0fc109ee27be98..2aeed039c3a928 100644
--- a/test/integration/fixtures/blocks/core__comments-title.parsed.json
+++ b/test/integration/fixtures/blocks/core__comments-title.parsed.json
@@ -2,17 +2,25 @@
 	{
 		"blockName": "core/comments-title",
 		"attrs": {
+			"level": 4,
 			"style": {
-				"typography": {
-					"textTransform": "uppercase",
-					"fontStyle": "italic",
-					"fontWeight": "900",
-					"lineHeight": "3"
+				"spacing": {
+					"padding": {
+						"top": "6px",
+						"right": "6px",
+						"bottom": "6px",
+						"left": "6px"
+					}
+				},
+				"border": {
+					"width": "3px",
+					"radius": "100px"
 				}
 			},
-			"textColor": "vivid-purple",
-			"fontSize": "x-large",
-			"fontFamily": "source-serif-pro"
+			"borderColor": "vivid-red",
+			"backgroundColor": "primary",
+			"textColor": "background",
+			"fontSize": "large"
 		},
 		"innerBlocks": [],
 		"innerHTML": "",
diff --git a/test/integration/fixtures/blocks/core__comments-title.serialized.html b/test/integration/fixtures/blocks/core__comments-title.serialized.html
index e54095328f79a3..6507dc669314d4 100644
--- a/test/integration/fixtures/blocks/core__comments-title.serialized.html
+++ b/test/integration/fixtures/blocks/core__comments-title.serialized.html
@@ -1 +1 @@
-<!-- wp:comments-title {"textColor":"vivid-purple","fontFamily":"source-serif-pro","fontSize":"x-large","style":{"typography":{"textTransform":"uppercase","fontStyle":"italic","fontWeight":"900","lineHeight":"3"}}} /-->
+<!-- wp:comments-title {"level":4,"borderColor":"vivid-red","backgroundColor":"primary","textColor":"background","fontSize":"large","style":{"spacing":{"padding":{"top":"6px","right":"6px","bottom":"6px","left":"6px"}},"border":{"width":"3px","radius":"100px"}}} /-->