diff --git a/packages/block-editor/src/components/inserter/style.scss b/packages/block-editor/src/components/inserter/style.scss
index 1bca09ec92bc1..604268fb1fe43 100644
--- a/packages/block-editor/src/components/inserter/style.scss
+++ b/packages/block-editor/src/components/inserter/style.scss
@@ -116,7 +116,18 @@ $block-inserter-tabs-height: 44px;
 	overflow: hidden;
 
 	.block-editor-inserter__tablist {
-		margin-bottom: -$border-width;
+		width: 100%;
+
+		button[role="tab"] {
+			flex-grow: 1;
+			margin-bottom: -$border-width;
+			&[id$="reusable"] {
+				flex-grow: inherit;
+				// These are to align the `reusable` icon with the search icon.
+				padding-left: $grid-unit-20;
+				padding-right: $grid-unit-20;
+			}
+		}
 	}
 
 	.block-editor-inserter__tabpanel {