diff --git a/extensions/theme-2026/themes/styles.css b/extensions/theme-2026/themes/styles.css
index 8276fdaa961..d029c4317cc 100644
--- a/extensions/theme-2026/themes/styles.css
+++ b/extensions/theme-2026/themes/styles.css
@@ -607,7 +607,6 @@
 	background-color: var(--vscode-editorWidget-background) !important;
 	backdrop-filter: var(--backdrop-blur-md);
 	-webkit-backdrop-filter: var(--backdrop-blur-md);
-	border-radius: var(--radius-md);
 	box-shadow: var(--shadow-sm);
 }
 
diff --git a/src/vs/workbench/contrib/notebook/browser/media/notebook.css b/src/vs/workbench/contrib/notebook/browser/media/notebook.css
index 11994166b6e..54f1f0dfc78 100644
--- a/src/vs/workbench/contrib/notebook/browser/media/notebook.css
+++ b/src/vs/workbench/contrib/notebook/browser/media/notebook.css
@@ -381,6 +381,10 @@
 	border-radius: var(--vscode-cornerRadius-small);
 }
 
+.notebookOverlay .monaco-list-row .cell-title-toolbar {
+	border-radius: var(--vscode-cornerRadius-medium);
+}
+
 .notebookOverlay .monaco-list-row .cell-title-toolbar,
 .notebookOverlay .monaco-list-row.cell-drag-image,
 .notebookOverlay .cell-bottom-toolbar-container .action-item,