diff --git a/ui/src/ui/chat/tool-cards.test.ts b/ui/src/ui/chat/tool-cards.test.ts
index 5e77a0b0d9a..3c852112cda 100644
--- a/ui/src/ui/chat/tool-cards.test.ts
+++ b/ui/src/ui/chat/tool-cards.test.ts
@@ -129,7 +129,8 @@ describe("tool-cards", () => {
     expect(rawToggle?.getAttribute("aria-expanded")).toBe("false");
     expect(rawBody?.hidden).toBe(true);
 
-    rawToggle?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+    expect(rawToggle).toBeInstanceOf(HTMLButtonElement);
+    rawToggle!.dispatchEvent(new MouseEvent("click", { bubbles: true }));
 
     expect(rawToggle?.getAttribute("aria-expanded")).toBe("true");
     expect(rawBody?.hidden).toBe(false);
@@ -173,8 +174,9 @@ describe("tool-cards", () => {
     );
 
     const sidebarButton = container.querySelector<HTMLButtonElement>(".chat-tool-card__action-btn");
+    expect(sidebarButton).toBeInstanceOf(HTMLButtonElement);
     expect(sidebarButton?.classList.contains("chat-tool-card__action-btn")).toBe(true);
-    sidebarButton?.click();
+    sidebarButton!.click();
 
     expect(onOpenSidebar).toHaveBeenCalledWith(
       expect.objectContaining({