diff --git a/services/webmail/src/lib/bimiLogo.test.ts b/services/webmail/src/lib/bimiLogo.test.ts
index 828c38b..e166cc7 100644
--- a/services/webmail/src/lib/bimiLogo.test.ts
+++ b/services/webmail/src/lib/bimiLogo.test.ts
@@ -148,7 +148,7 @@ describe("buildLogoSvg", () => {
 
   it("counts bytes, not characters", () => {
     expect(byteLength("a")).toBe(1);
-    expect(byteLength("é")).toBe(2);
+    expect(byteLength("\u00e9")).toBe(2);
   });
 });