diff --git a/packages/block-editor/src/components/block-inspector/style.scss b/packages/block-editor/src/components/block-inspector/style.scss
index 92a9a0dd03ab3..abca451035fde 100644
--- a/packages/block-editor/src/components/block-inspector/style.scss
+++ b/packages/block-editor/src/components/block-inspector/style.scss
@@ -17,6 +17,7 @@
 	}
 
 	// Reset unwanted margin-bottom from being applied to BaseControls within certain components.
+	.block-editor-inspector-controls__no-base-control-margin,
 	.components-focal-point-picker-control,
 	.components-query-controls,
 	.components-range-control {
diff --git a/packages/block-editor/src/components/inspector-controls/fill.js b/packages/block-editor/src/components/inspector-controls/fill.js
index 456b33af9137f..3c8886f92159c 100644
--- a/packages/block-editor/src/components/inspector-controls/fill.js
+++ b/packages/block-editor/src/components/inspector-controls/fill.js
@@ -22,6 +22,7 @@ export default function InspectorControlsFill( {
 	children,
 	group = 'default',
 	__experimentalGroup,
+	__nextNoBaseControlMargin = false,
 	resetAllFilter,
 } ) {
 	if ( __experimentalGroup ) {
@@ -53,7 +54,15 @@ export default function InspectorControlsFill( {
 					return (
 						<ToolsPanelInspectorControl
 							fillProps={ fillProps }
-							children={ children }
+							children={
+								__nextNoBaseControlMargin ? (
+									<div className="block-editor-inspector-controls__no-base-control-margin">
+										{ children }
+									</div>
+								) : (
+									children
+								)
+							}
 							resetAllFilter={ resetAllFilter }
 						/>
 					);
diff --git a/packages/block-library/src/editor.scss b/packages/block-library/src/editor.scss
index 0669a082b1086..52f3aa64287fa 100644
--- a/packages/block-library/src/editor.scss
+++ b/packages/block-library/src/editor.scss
@@ -31,7 +31,6 @@
 @import "./nextpage/editor.scss";
 @import "./page-list/editor.scss";
 @import "./paragraph/editor.scss";
-@import "./post-author/editor.scss";
 @import "./post-excerpt/editor.scss";
 @import "./pullquote/editor.scss";
 @import "./rss/editor.scss";
diff --git a/packages/block-library/src/post-author/edit.js b/packages/block-library/src/post-author/edit.js
index 6186b0d052e8a..c0c9934994ffe 100644
--- a/packages/block-library/src/post-author/edit.js
+++ b/packages/block-library/src/post-author/edit.js
@@ -99,12 +99,9 @@ function PostAuthorEdit( {
 
 	return (
 		<>
-			<InspectorControls>
+			<InspectorControls __nextNoBaseControlMargin>
 				<PanelBody title={ __( 'Settings' ) }>
-					<VStack
-						spacing={ 4 }
-						className="wp-block-post-author__inspector-settings"
-					>
+					<VStack spacing={ 4 }>
 						{ showAuthorControl &&
 							( ( showCombobox && (
 								<ComboboxControl
diff --git a/packages/block-library/src/post-author/editor.scss b/packages/block-library/src/post-author/editor.scss
deleted file mode 100644
index f6464893138cf..0000000000000
--- a/packages/block-library/src/post-author/editor.scss
+++ /dev/null
@@ -1,7 +0,0 @@
-.wp-block-post-author__inspector-settings {
-	// Counteract the margin added by the block inspector.
-	.components-base-control,
-	.components-base-control:last-child {
-		margin-bottom: 0;
-	}
-}