diff --git a/src/Util/Tokens.php b/src/Util/Tokens.php
index 5554cc9aae..73cf02ddd7 100644
--- a/src/Util/Tokens.php
+++ b/src/Util/Tokens.php
@@ -85,6 +85,11 @@
 define('T_TYPE_OPEN_PARENTHESIS', 'PHPCS_T_TYPE_OPEN_PARENTHESIS');
 define('T_TYPE_CLOSE_PARENTHESIS', 'PHPCS_T_TYPE_CLOSE_PARENTHESIS');
 
+/*
+ * {@internal IMPORTANT: all PHP native polyfilled tokens MUST be added to the
+ * `PHP_CodeSniffer\Tests\Core\Util\Tokens\TokenNameTest::dataPolyfilledPHPNativeTokens()` test method!}
+ */
+
 // Some PHP 5.5 tokens, replicated for lower versions.
 if (defined('T_FINALLY') === false) {
     define('T_FINALLY', 'PHPCS_T_FINALLY');
diff --git a/tests/Core/Util/Tokens/TokenNameTest.php b/tests/Core/Util/Tokens/TokenNameTest.php
index 435df07139..28c6c613c2 100644
--- a/tests/Core/Util/Tokens/TokenNameTest.php
+++ b/tests/Core/Util/Tokens/TokenNameTest.php
@@ -28,6 +28,7 @@ final class TokenNameTest extends TestCase
      * @param string     $expected  The expected token name.
      *
      * @dataProvider dataTokenName
+     * @dataProvider dataPolyfilledPHPNativeTokens
      *
      * @return void
      */
@@ -78,4 +79,106 @@ public static function dataTokenName()
     }//end dataTokenName()
 
 
+    /**
+     * Data provider.
+     *
+     * @return array<string, array<string, int|string>>
+     */
+    public static function dataPolyfilledPHPNativeTokens()
+    {
+        return [
+            'PHP 5.5 native token, polyfilled: T_FINALLY'                                 => [
+                'tokenCode' => T_FINALLY,
+                'expected'  => 'T_FINALLY',
+            ],
+            'PHP 5.5 native token, polyfilled: T_YIELD'                                   => [
+                'tokenCode' => T_YIELD,
+                'expected'  => 'T_YIELD',
+            ],
+
+            'PHP 5.6 native token, polyfilled: T_ELLIPSIS'                                => [
+                'tokenCode' => T_ELLIPSIS,
+                'expected'  => 'T_ELLIPSIS',
+            ],
+            'PHP 5.6 native token, polyfilled: T_POW'                                     => [
+                'tokenCode' => T_POW,
+                'expected'  => 'T_POW',
+            ],
+            'PHP 5.6 native token, polyfilled: T_POW_EQUAL'                               => [
+                'tokenCode' => T_POW_EQUAL,
+                'expected'  => 'T_POW_EQUAL',
+            ],
+
+            'PHP 7.0 native token, polyfilled: T_SPACESHIP'                               => [
+                'tokenCode' => T_SPACESHIP,
+                'expected'  => 'T_SPACESHIP',
+            ],
+            'PHP 7.0 native token, polyfilled: T_COALESCE'                                => [
+                'tokenCode' => T_COALESCE,
+                'expected'  => 'T_COALESCE',
+            ],
+            'PHP 7.0 native token, polyfilled: T_YIELD_FROM'                              => [
+                'tokenCode' => T_YIELD_FROM,
+                'expected'  => 'T_YIELD_FROM',
+            ],
+
+            'PHP 7.4 native token, polyfilled: T_COALESCE_EQUAL'                          => [
+                'tokenCode' => T_COALESCE_EQUAL,
+                'expected'  => 'T_COALESCE_EQUAL',
+            ],
+            'PHP 7.4 native token, polyfilled: T_BAD_CHARACTER'                           => [
+                'tokenCode' => T_BAD_CHARACTER,
+                'expected'  => 'T_BAD_CHARACTER',
+            ],
+            'PHP 7.4 native token, polyfilled: T_FN'                                      => [
+                'tokenCode' => T_FN,
+                'expected'  => 'T_FN',
+            ],
+
+            'PHP 8.0 native token, polyfilled: T_NULLSAFE_OBJECT_OPERATOR'                => [
+                'tokenCode' => T_NULLSAFE_OBJECT_OPERATOR,
+                'expected'  => 'T_NULLSAFE_OBJECT_OPERATOR',
+            ],
+            'PHP 8.0 native token, polyfilled: T_NAME_QUALIFIED'                          => [
+                'tokenCode' => T_NAME_QUALIFIED,
+                'expected'  => 'T_NAME_QUALIFIED',
+            ],
+            'PHP 8.0 native token, polyfilled: T_NAME_FULLY_QUALIFIED'                    => [
+                'tokenCode' => T_NAME_FULLY_QUALIFIED,
+                'expected'  => 'T_NAME_FULLY_QUALIFIED',
+            ],
+            'PHP 8.0 native token, polyfilled: T_NAME_RELATIVE'                           => [
+                'tokenCode' => T_NAME_RELATIVE,
+                'expected'  => 'T_NAME_RELATIVE',
+            ],
+            'PHP 8.0 native token, polyfilled: T_MATCH'                                   => [
+                'tokenCode' => T_MATCH,
+                'expected'  => 'T_MATCH',
+            ],
+            'PHP 8.0 native token, polyfilled: T_ATTRIBUTE'                               => [
+                'tokenCode' => T_ATTRIBUTE,
+                'expected'  => 'T_ATTRIBUTE',
+            ],
+
+            'PHP 8.1 native token, polyfilled: T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG'     => [
+                'tokenCode' => T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG,
+                'expected'  => 'T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG',
+            ],
+            'PHP 8.1 native token, polyfilled: T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG' => [
+                'tokenCode' => T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG,
+                'expected'  => 'T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG',
+            ],
+            'PHP 8.1 native token, polyfilled: T_READONLY'                                => [
+                'tokenCode' => T_READONLY,
+                'expected'  => 'T_READONLY',
+            ],
+            'PHP 8.1 native token, polyfilled: T_ENUM'                                    => [
+                'tokenCode' => T_ENUM,
+                'expected'  => 'T_ENUM',
+            ],
+        ];
+
+    }//end dataPolyfilledPHPNativeTokens()
+
+
 }//end class