diff --git a/Magento2/Sniffs/Functions/FunctionsDeprecatedWithoutArgumentSniff.php b/Magento2/Sniffs/Functions/FunctionsDeprecatedWithoutArgumentSniff.php
index 331e918e..e410c4d9 100644
--- a/Magento2/Sniffs/Functions/FunctionsDeprecatedWithoutArgumentSniff.php
+++ b/Magento2/Sniffs/Functions/FunctionsDeprecatedWithoutArgumentSniff.php
@@ -31,15 +31,14 @@ class FunctionsDeprecatedWithoutArgumentSniff implements Sniff
     private const WARNING_CODE = 'FunctionsDeprecatedWithoutArgument';
 
     /**
-     * Deprecated functions without argument.
+     * Deprecated functions without argument https://wiki.php.net/rfc/deprecations_php_8_1
      *
      * @var array
      */
-    private const FUNCTIONS_LIST = [
-        'mb_check_encoding',
-        'get_class',
-        'get_parent_class',
-        'get_called_class'
+    private const DEPRECATED_FUNCTIONS_AND_FIXES = [
+        'mb_check_encoding' => false,
+        'get_class' => '$this',
+        'get_parent_class' => '$this'
     ];
 
     /**
@@ -66,8 +65,30 @@ public function process(File $phpcsFile, $stackPtr): void
 
         $functionName = $phpcsFile->getTokensAsString($phpcsFile->findPrevious(T_STRING, $stackPtr), 1);
 
-        if (in_array($functionName, self::FUNCTIONS_LIST)) {
-            $phpcsFile->addWarning(sprintf(self::WARNING_MESSAGE, $functionName), $stackPtr, self::WARNING_CODE);
+        if (!isset(self::DEPRECATED_FUNCTIONS_AND_FIXES[$functionName])) {
+            return;
+        }
+
+        if (self::DEPRECATED_FUNCTIONS_AND_FIXES[$functionName] === false) {
+            $phpcsFile->addWarning(
+                sprintf(self::WARNING_MESSAGE, $functionName),
+                $stackPtr,
+                self::WARNING_CODE
+            );
+            return;
+        }
+        
+        $fix = $phpcsFile->addFixableWarning(
+            sprintf(self::WARNING_MESSAGE, $functionName),
+            $stackPtr,
+            self::WARNING_CODE
+        );
+
+        if ($fix === true) {
+            $content = self::DEPRECATED_FUNCTIONS_AND_FIXES[$functionName];
+            $phpcsFile->fixer->beginChangeset();
+            $phpcsFile->fixer->addContentBefore($phpcsFile->findNext(T_CLOSE_PARENTHESIS, $stackPtr), $content);
+            $phpcsFile->fixer->endChangeset();
         }
     }
 }
diff --git a/Magento2/Tests/Functions/FunctionsDeprecatedWithoutArgumentUnitTest.inc b/Magento2/Tests/Functions/FunctionsDeprecatedWithoutArgumentUnitTest.inc
index 63b449b9..7bdfeb89 100644
--- a/Magento2/Tests/Functions/FunctionsDeprecatedWithoutArgumentUnitTest.inc
+++ b/Magento2/Tests/Functions/FunctionsDeprecatedWithoutArgumentUnitTest.inc
@@ -21,13 +21,11 @@ class FunctionsDeprecatedWithoutArgument
     {
         return [
             mb_check_encoding(), // Calling without argument is deprecated.
-            mb_check_encoding('test-argument', null),
+            mb_check_encoding('test-argument'),
             get_class(), // Calling without argument is deprecated.
             get_class(new FunctionsDeprecatedWithoutArgument()),
             get_parent_class(), // Calling without argument is deprecated.
-            get_parent_class('test-argument'),
-            get_called_class(), // Calling without argument is deprecated.
-            get_called_class('test-argument')
+            get_parent_class(new FunctionsDeprecatedWithoutArgument())
         ];
     }
 }
diff --git a/Magento2/Tests/Functions/FunctionsDeprecatedWithoutArgumentUnitTest.inc.fixed b/Magento2/Tests/Functions/FunctionsDeprecatedWithoutArgumentUnitTest.inc.fixed
new file mode 100644
index 00000000..1f4f20d9
--- /dev/null
+++ b/Magento2/Tests/Functions/FunctionsDeprecatedWithoutArgumentUnitTest.inc.fixed
@@ -0,0 +1,31 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento2\Tests\Functions;
+
+/**
+ * Class to test validate PHP functions usage of which without passing arguments.
+ */
+class FunctionsDeprecatedWithoutArgument
+{
+    /**
+     * Test deprecation function.
+     *
+     * @return array
+     */
+    public function testDeprecatedMethod(): array
+    {
+        return [
+            mb_check_encoding(), // Calling without argument is deprecated.
+            mb_check_encoding('test-argument'),
+            get_class($this), // Calling without argument is deprecated.
+            get_class(new FunctionsDeprecatedWithoutArgument()),
+            get_parent_class($this), // Calling without argument is deprecated.
+            get_parent_class(new FunctionsDeprecatedWithoutArgument())
+        ];
+    }
+}
diff --git a/Magento2/Tests/Functions/FunctionsDeprecatedWithoutArgumentUnitTest.php b/Magento2/Tests/Functions/FunctionsDeprecatedWithoutArgumentUnitTest.php
index 691dd43a..1b397629 100644
--- a/Magento2/Tests/Functions/FunctionsDeprecatedWithoutArgumentUnitTest.php
+++ b/Magento2/Tests/Functions/FunctionsDeprecatedWithoutArgumentUnitTest.php
@@ -30,8 +30,7 @@ public function getWarningList(): array
         return [
             23 => 1,
             25 => 1,
-            27 => 1,
-            29 => 1
+            27 => 1
         ];
     }
 }
diff --git a/composer.json b/composer.json
index aa896857..b1bb3527 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
         "AFL-3.0"
     ],
     "type": "phpcodesniffer-standard",
-    "version": "18",
+    "version": "19",
     "require": {
         "php": ">=7.3",
         "webonyx/graphql-php": "^14.9",
diff --git a/composer.lock b/composer.lock
index d38bc239..a6150286 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "d7ee7044cc0bf8d83a035a641253afac",
+    "content-hash": "aa79ce9c9f280386c7881e40e49a59e4",
     "packages": [
         {
             "name": "phpcompatibility/php-compatibility",
@@ -402,6 +402,9 @@
             "require": {
                 "php": "^7.1 || ^8.0"
             },
+            "replace": {
+                "myclabs/deep-copy": "self.version"
+            },
             "require-dev": {
                 "doctrine/collections": "^1.0",
                 "doctrine/common": "^2.6",
@@ -2253,12 +2256,12 @@
                 }
             },
             "autoload": {
-                "psr-4": {
-                    "Symfony\\Polyfill\\Ctype\\": ""
-                },
                 "files": [
                     "bootstrap.php"
-                ]
+                ],
+                "psr-4": {
+                    "Symfony\\Polyfill\\Ctype\\": ""
+                }
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
@@ -2421,5 +2424,5 @@
         "ext-dom": "*"
     },
     "platform-dev": [],
-    "plugin-api-version": "2.2.0"
+    "plugin-api-version": "2.1.0"
 }