diff --git a/packages/session-ui/src/v2/components/session-review-v2.css b/packages/session-ui/src/v2/components/session-review-v2.css
index 751c258a5272..e28a6787d4a9 100644
--- a/packages/session-ui/src/v2/components/session-review-v2.css
+++ b/packages/session-ui/src/v2/components/session-review-v2.css
@@ -244,7 +244,7 @@
 }
 
 [data-component="icon-button-v2"][data-variant="ghost"].session-review-v2-sidebar-toggle[aria-expanded="true"] {
-  background-color: var(--v2-overlay-simple-overlay-pressed);
+  background-color: var(--v2-background-bg-layer-02);
 }
 
 [data-component="session-review-v2"] [data-slot="session-review-v2-file-header"] {
diff --git a/packages/session-ui/src/v2/components/session-review-v2.tsx b/packages/session-ui/src/v2/components/session-review-v2.tsx
index abbe90d11266..0d33078a0ce1 100644
--- a/packages/session-ui/src/v2/components/session-review-v2.tsx
+++ b/packages/session-ui/src/v2/components/session-review-v2.tsx
@@ -331,6 +331,7 @@ export function SessionReviewV2SidebarToggle(props: { opened: boolean; disabled?
         class="session-review-v2-sidebar-toggle"
         aria-label={i18n.t("ui.sessionReviewV2.toggleSidebar")}
         aria-expanded={props.opened}
+        data-expanded={props.opened ? "" : undefined}
         disabled={props.disabled}
         onClick={props.onToggle}
         icon={<Icon name="filetree" />}