diff --git a/Magento2/Sniffs/Legacy/CopyrightAnotherExtensionsFilesSniff.php b/Magento2/Sniffs/Legacy/CopyrightAnotherExtensionsFilesSniff.php
index 1455ee58..a1d6995b 100644
--- a/Magento2/Sniffs/Legacy/CopyrightAnotherExtensionsFilesSniff.php
+++ b/Magento2/Sniffs/Legacy/CopyrightAnotherExtensionsFilesSniff.php
@@ -7,6 +7,7 @@
 
 namespace Magento2\Sniffs\Legacy;
 
+use Magento2\Sniffs\Less\TokenizerSymbolsInterface;
 use PHP_CodeSniffer\Files\File;
 use PHP_CodeSniffer\Sniffs\Sniff;
 
@@ -16,6 +17,13 @@ class CopyrightAnotherExtensionsFilesSniff implements Sniff
 
     private const COPYRIGHT_MAGENTO_TEXT = 'Copyright © Magento, Inc. All rights reserved.';
     private const COPYRIGHT_ADOBE = '/Copyright \d+ Adobe/';
+
+    /**
+     * Defines the tokenizers that this sniff is using.
+     *
+     * @var array
+     */
+    public $supportedTokenizers = [TokenizerSymbolsInterface::TOKENIZER_CSS, 'PHP'];
     
     /**
      * @inheritDoc
@@ -23,7 +31,8 @@ class CopyrightAnotherExtensionsFilesSniff implements Sniff
     public function register(): array
     {
         return [
-            T_INLINE_HTML
+            T_INLINE_HTML,
+            T_OPEN_TAG
         ];
     }
 
diff --git a/Magento2/Tests/Legacy/CopyrightAnotherExtensionsFilesUnitTest.xml b/Magento2/Tests/Legacy/CopyrightAnotherExtensionsFilesUnitTest.3.xml
similarity index 100%
rename from Magento2/Tests/Legacy/CopyrightAnotherExtensionsFilesUnitTest.xml
rename to Magento2/Tests/Legacy/CopyrightAnotherExtensionsFilesUnitTest.3.xml
diff --git a/Magento2/Tests/Legacy/CopyrightAnotherExtensionsFilesUnitTest.5.less b/Magento2/Tests/Legacy/CopyrightAnotherExtensionsFilesUnitTest.5.less
new file mode 100644
index 00000000..a86154e6
--- /dev/null
+++ b/Magento2/Tests/Legacy/CopyrightAnotherExtensionsFilesUnitTest.5.less
@@ -0,0 +1,8 @@
+/**
+ * Copyright © Magento, Inc.
+ * See COPYING.txt for license details.
+ */
+
+//@magento_import "magento_import.less";
+@import "dir/import.less";
+
diff --git a/Magento2/Tests/Legacy/CopyrightAnotherExtensionsFilesUnitTest.php b/Magento2/Tests/Legacy/CopyrightAnotherExtensionsFilesUnitTest.php
index 8796abb9..4223e600 100644
--- a/Magento2/Tests/Legacy/CopyrightAnotherExtensionsFilesUnitTest.php
+++ b/Magento2/Tests/Legacy/CopyrightAnotherExtensionsFilesUnitTest.php
@@ -36,6 +36,11 @@ public function getWarningList($testFile = '')
         if ($testFile === 'CopyrightAnotherExtensionsFilesUnitTest.4.js') {
             return [];
         }
+        if ($testFile === 'CopyrightAnotherExtensionsFilesUnitTest.5.less') {
+            return [
+                null => 1,
+            ];
+        }
         return [];
     }
 }