diff --git a/tests/e2e/register.test.ts b/tests/e2e/register.test.ts
index c8bc6c211f..70059355e4 100644
--- a/tests/e2e/register.test.ts
+++ b/tests/e2e/register.test.ts
@@ -24,7 +24,7 @@ test('register with empty fields shows error', async ({page}) => {
 
 test('register with mismatched passwords shows error', async ({page}) => {
   await page.getByLabel('Username').fill('e2e-register-mismatch');
-  await page.getByLabel('Email Address').fill('e2e-register-mismatch@test.gitea.io');
+  await page.getByLabel('Email Address').fill('e2e-register-mismatch@e2e.gitea.com');
   await page.getByLabel('Password', {exact: true}).fill('password123!');
   await page.getByLabel('Confirm Password').fill('different123!');
   await page.getByRole('button', {name: 'Register Account'}).click();
@@ -33,7 +33,7 @@ test('register with mismatched passwords shows error', async ({page}) => {
 
 test('register then login', async ({page}) => {
   const username = `e2e-register-${Date.now()}`;
-  const email = `${username}@test.gitea.io`;
+  const email = `${username}@e2e.gitea.com`;
   const password = 'password123!';
 
   await page.getByLabel('Username').fill(username);
@@ -62,7 +62,7 @@ test('register then login', async ({page}) => {
 
 test('register with existing username shows error', async ({page}) => {
   await page.getByLabel('Username').fill('e2e');
-  await page.getByLabel('Email Address').fill('e2e-duplicate@test.gitea.io');
+  await page.getByLabel('Email Address').fill('e2e-duplicate@e2e.gitea.com');
   await page.getByLabel('Password', {exact: true}).fill('password123!');
   await page.getByLabel('Confirm Password').fill('password123!');
   await page.getByRole('button', {name: 'Register Account'}).click();
diff --git a/tools/test-e2e.sh b/tools/test-e2e.sh
index ed7d2233ef..648d5255b6 100755
--- a/tools/test-e2e.sh
+++ b/tools/test-e2e.sh
@@ -69,7 +69,7 @@ done
 
 # Create e2e test user if it does not already exist
 E2E_USER="e2e"
-E2E_EMAIL="e2e@test.gitea.io"
+E2E_EMAIL="e2e@e2e.gitea.com"
 E2E_PASSWORD="password"
 if ! curl -sf --max-time 5 "$E2E_URL/api/v1/users/$E2E_USER" > /dev/null 2>&1; then
   echo "Creating e2e test user..."