diff --git a/core/modules/user/src/Tests/UserEditedOwnAccountTest.php b/core/modules/user/src/Tests/UserEditedOwnAccountTest.php
index ed97bf5..05052e1 100644
--- a/core/modules/user/src/Tests/UserEditedOwnAccountTest.php
+++ b/core/modules/user/src/Tests/UserEditedOwnAccountTest.php
@@ -46,7 +46,7 @@ function testUserEditedOwnAccount() {
     // Attempt to change username to an email other than my own.
     $edit['name'] = $this->randomName() . '@example.com';
     $this->drupalPostForm('user/' . $account->id() . '/edit', $edit, t('Save'));
-    $this->assertText(t('If your username is an email address, it must match your email.'), 'Error message found when an email username does not match user email.');
+    $this->assertText(t('You have provided an e-mail address as a username, but this does not match your e-mail address.'), 'Error message found when an email username does not match user email.');
     $this->assertNoText(t('The changes have been saved.'), 'The user account was not saved.');
 
     // Lookup user by name to make sure we didn't actually change the name.
diff --git a/core/modules/user/src/Tests/UserRegistrationTest.php b/core/modules/user/src/Tests/UserRegistrationTest.php
index 5c15c8a..5a13ce8 100644
--- a/core/modules/user/src/Tests/UserRegistrationTest.php
+++ b/core/modules/user/src/Tests/UserRegistrationTest.php
@@ -175,7 +175,7 @@ function testRegistrationEmailAsUsername() {
 
     // Attempt to create an account using an email that doesn't match the name.
     $this->drupalPostForm('user/register', $edit, t('Create new account'));
-    $this->assertText(t('If your username is an email address, it must match your email.'), 'Email username does not match user email error message found.');
+    $this->assertText(t('You have provided an e-mail address as a username, but this does not match your e-mail address.'), 'Email username does not match user email error message found.');
     $this->assertNoText(t('Registration successful. You are now logged in.'), 'The user was not created and logged in.');
 
     // Attempt to create new account using matching email address.