diff --git a/src/app/email_templates/buildMailHeaders.test.ts b/src/app/email_templates/buildMailHeaders.test.ts
index e93cbdd..999f62c 100644
--- a/src/app/email_templates/buildMailHeaders.test.ts
+++ b/src/app/email_templates/buildMailHeaders.test.ts
@@ -4,7 +4,7 @@ import { buildMailHeaders } from "./buildMailHeaders";
 describe("buildMailHeaders", () => {
   it("includes X-SES-CONFIGURATION-SET when a configuration set is provided", () => {
     const headers = buildMailHeaders({
-      fromAddress: "noreply@domna.homes",
+      fromAddress: "test-sender@example.test",
       sesConfigurationSet: "test-config-set",
     });
 
@@ -13,7 +13,7 @@ describe("buildMailHeaders", () => {
 
   it("omits X-SES-CONFIGURATION-SET entirely when no configuration set is provided", () => {
     const headers = buildMailHeaders({
-      fromAddress: "noreply@domna.homes",
+      fromAddress: "test-sender@example.test",
       sesConfigurationSet: undefined,
     });
 
@@ -22,10 +22,10 @@ describe("buildMailHeaders", () => {
 
   it("always includes a List-Unsubscribe mailto pointing at the from address", () => {
     const headers = buildMailHeaders({
-      fromAddress: "noreply@domna.homes",
+      fromAddress: "test-sender@example.test",
       sesConfigurationSet: undefined,
     });
 
-    expect(headers["List-Unsubscribe"]).toBe("<mailto:noreply@domna.homes>");
+    expect(headers["List-Unsubscribe"]).toBe("<mailto:test-sender@example.test>");
   });
 });