diff --git a/webview-ui/src/components/settings/__tests__/UISettings.spec.tsx b/webview-ui/src/components/settings/__tests__/UISettings.spec.tsx
index 43bb013a08..9d9e014c54 100644
--- a/webview-ui/src/components/settings/__tests__/UISettings.spec.tsx
+++ b/webview-ui/src/components/settings/__tests__/UISettings.spec.tsx
@@ -6,6 +6,7 @@ describe("UISettings", () => {
 	const defaultProps = {
 		reasoningBlockCollapsed: false,
 		setCachedStateField: vi.fn(),
+		chatMessageFontSize: "default",
 	}
 
 	it("renders the collapse thinking checkbox", () => {