diff --git a/src/EmailLexer.php b/src/EmailLexer.php
index a7fdc2d2..4e3383ab 100644
--- a/src/EmailLexer.php
+++ b/src/EmailLexer.php
@@ -157,9 +157,7 @@ class EmailLexer extends AbstractLexer
 
     public function __construct()
     {
-        /** @var Token<int, string> $nullToken */
-        $nullToken = new Token('', self::S_EMPTY, 0);
-        $this->nullToken = $nullToken;
+        $this->nullToken = new Token('', self::S_EMPTY, 0);
 
         $this->current = $this->previous = $this->nullToken;
         $this->lookahead = null;
diff --git a/src/Validation/DNSCheckValidation.php b/src/Validation/DNSCheckValidation.php
index 469e87dc..fcfe7db1 100644
--- a/src/Validation/DNSCheckValidation.php
+++ b/src/Validation/DNSCheckValidation.php
@@ -85,8 +85,9 @@ public function isValid(string $email, EmailLexer $emailLexer): bool
         // Get the domain parts
         $hostParts = explode('.', $host);
 
-        $isLocalDomain = count($hostParts) <= 1;
-        $isReservedTopLevel = in_array($hostParts[(count($hostParts) - 1)], self::RESERVED_DNS_TOP_LEVEL_NAMES, true);
+        $countHostParts = count($hostParts);
+        $isLocalDomain = $countHostParts <= 1;
+        $isReservedTopLevel = in_array($hostParts[($countHostParts - 1)], self::RESERVED_DNS_TOP_LEVEL_NAMES, true);
 
         // Exclude reserved top level DNS names
         if ($isLocalDomain || $isReservedTopLevel) {