diff --git a/Magento2/Sniffs/Less/ClassNamingSniff.php b/Magento2/Sniffs/Less/ClassNamingSniff.php
index babd0653..3c3d1a86 100644
--- a/Magento2/Sniffs/Less/ClassNamingSniff.php
+++ b/Magento2/Sniffs/Less/ClassNamingSniff.php
@@ -67,7 +67,7 @@ public function process(File $phpcsFile, $stackPtr)
             );
         }
 
-        if (strpos($className, self::STRING_HELPER_CLASSES_PREFIX, 2) !== false
+        if (strlen($className) > 1 && strpos($className, self::STRING_HELPER_CLASSES_PREFIX, 2) !== false
             && !str_starts_with($className, 'admin__')
         ) {
             $phpcsFile->addError(
diff --git a/Magento2/Tests/Less/ClassNamingUnitTest.less b/Magento2/Tests/Less/ClassNamingUnitTest.less
index bbb29cde..b7860bc4 100644
--- a/Magento2/Tests/Less/ClassNamingUnitTest.less
+++ b/Magento2/Tests/Less/ClassNamingUnitTest.less
@@ -31,6 +31,11 @@
   background: green;
 }
 
+// @see https://github.com/magento/magento-coding-standard/issues/425
+.a {
+  text-decoration: none;
+}
+
 // @see https://github.com/magento/magento-coding-standard/issues/409
 .admin__allowed {
   background: green;