diff --git a/packages/block-library/src/post-comments-form/style.scss b/packages/block-library/src/post-comments-form/style.scss
index 3df620b80f9b80..a22136267c2572 100644
--- a/packages/block-library/src/post-comments-form/style.scss
+++ b/packages/block-library/src/post-comments-form/style.scss
@@ -67,4 +67,15 @@
 			margin-top: 0.35em;
 		}
 	}
+
+	.comment-reply-title {
+		align-items: baseline;
+		display: flex;
+		justify-content: space-between;
+		margin-bottom: 0;
+
+		:where(small) {
+			font-size: var(--wp--preset--font-size--medium, smaller);
+		}
+	}
 }