diff --git a/apps/pr-reviewer/fixtures/demo-pr/currency.ts b/apps/pr-reviewer/fixtures/demo-pr/currency.ts
index 21caeeb..eaf6eb5 100644
--- a/apps/pr-reviewer/fixtures/demo-pr/currency.ts
+++ b/apps/pr-reviewer/fixtures/demo-pr/currency.ts
@@ -1,3 +1,4 @@
 export function formatUsd(cents: number): string {
-  return "$" + cents / 100;
+  const sign = cents < 0 ? "-" : "";
+  return sign + "$" + Math.abs(cents) / 100;
 }