diff --git a/apps/pr-reviewer/fixtures/demo-pr/email.ts b/apps/pr-reviewer/fixtures/demo-pr/email.ts
index 9867fe5..4b6f6bd 100644
--- a/apps/pr-reviewer/fixtures/demo-pr/email.ts
+++ b/apps/pr-reviewer/fixtures/demo-pr/email.ts
@@ -1,3 +1,7 @@
+export function normalizeEmail(value: string): string {
+  return value.trim().toLowerCase();
+}
+
 export function isEmail(value: string): boolean {
-  return value.includes("@");
+  return normalizeEmail(value).includes("@");
 }