diff --git a/frontend/src/renderer/components/Sidebar.test.tsx b/frontend/src/renderer/components/Sidebar.test.tsx
index 614c53e7a5..8e035aac2b 100644
--- a/frontend/src/renderer/components/Sidebar.test.tsx
+++ b/frontend/src/renderer/components/Sidebar.test.tsx
@@ -863,6 +863,12 @@ describe("Sidebar", () => {
 		expect(projectRow).toHaveClass("pr-sidebar-project-actions");
 	});
 
+	it("does not render a duplicate collapse trigger in the expanded header", () => {
+		renderSidebar();
+
+		expect(screen.queryByRole("button", { name: "Collapse sidebar" })).not.toBeInTheDocument();
+	});
+
 	it("snaps to the real collapsed rail when dragged past the resize collapse threshold", async () => {
 		renderSidebar();
 
diff --git a/frontend/src/renderer/components/Sidebar.tsx b/frontend/src/renderer/components/Sidebar.tsx
index b672fbb984..b462576a08 100644
--- a/frontend/src/renderer/components/Sidebar.tsx
+++ b/frontend/src/renderer/components/Sidebar.tsx
@@ -262,18 +262,6 @@ export function Sidebar({
 							nightly
 						</span>
 					)}
-					{/* On macOS the toggle lives in the titlebar cluster instead. */}
-					{!isMac && (
-						<Tooltip>
-							<TooltipTrigger asChild>
-								<SidebarTrigger
-									aria-label="Collapse sidebar"
-									className="sidebar-expanded-chrome size-icon-xl shrink-0 rounded-sm p-0 text-passive hover:bg-interactive-hover hover:text-foreground group-data-[collapsible=icon]:hidden [&_svg]:size-icon-lg"
-								/>
-							</TooltipTrigger>
-							<TooltipContent>Collapse sidebar · ⌘B</TooltipContent>
-						</Tooltip>
-					)}
 				</div>
 			</SidebarHeader>