General: Test improvement, thanks to SirLouen.

Author: arnt

tests/phpunit/tests/formatting/antispambot.php

@@ -10,6 +10,7 @@ public function test_returns_valid_utf8() {
 		$data = array(
 			'bob@example.com',
 			'phil@example.info',
+			'phil@example.TLD',
 			'ace@204.32.222.14',
 			'kevin@many.subdomains.make.a.happy.man.edu',
 			'a@b.co',

tests/phpunit/tests/formatting/isEmail.php

@@ -10,6 +10,7 @@ public function test_returns_the_email_address_if_it_is_valid() {
 		$data = array(
 			'bob@example.com',
 			'phil@example.info',
+			'phil@TLA.example',
 			'ace@204.32.222.14',
 			'kevin@many.subdomains.make.a.happy.man.edu',
 			'a@b.co',

tests/phpunit/tests/user.php

@@ -855,6 +855,8 @@ public function test_validate_username_invalid() {
 	 * Since validate_username() uses strict sanitization, this
 	 * test checks some codepoints strictly, rejecting some that
 	 * are less readable than confusable.
+	 *
+	 * @ticket 31992
 	 */
 	public function test_validate_utf8_usernames() {
 		if ( ! function_exists( 'mb_str_split' ) ) {