diff --git a/src/Result/InvalidEmail.php b/src/Result/InvalidEmail.php
index 0eff40c..3d85e15 100644
--- a/src/Result/InvalidEmail.php
+++ b/src/Result/InvalidEmail.php
@@ -10,7 +10,7 @@ class InvalidEmail implements Result
     /**
      * @var Reason
      */
-    private $reason;
+    protected $reason;
 
     public function __construct(Reason $reason, string $token)
     {
diff --git a/src/Result/MultipleErrors.php b/src/Result/MultipleErrors.php
index 2aec941..48021ab 100644
--- a/src/Result/MultipleErrors.php
+++ b/src/Result/MultipleErrors.php
@@ -5,6 +5,9 @@ namespace Egulias\EmailValidator\Result;
 use Egulias\EmailValidator\Result\InvalidEmail;
 use Egulias\EmailValidator\Result\Reason\Reason;
 
+/**
+ * @psalm-suppress PropertyNotSetInConstructor
+ */
 class MultipleErrors extends InvalidEmail
 {
     /**
@@ -33,4 +36,19 @@ class MultipleErrors extends InvalidEmail
     {
         return $this->reasons[0];
     }
+
+    public function description() : string
+    {
+        $description = '';
+        foreach($this->reasons as $reason) {
+            $description .= $reason->description() . PHP_EOL;
+        }
+
+        return $description;
+    }
+
+    public function code() : int
+    {
+        return 0;
+    }
 }
diff --git a/src/Validation/MultipleValidationWithAnd.php b/src/Validation/MultipleValidationWithAnd.php
index 74e0b63..a0483df 100644
--- a/src/Validation/MultipleValidationWithAnd.php
+++ b/src/Validation/MultipleValidationWithAnd.php
@@ -89,6 +89,7 @@ class MultipleValidationWithAnd implements EmailValidation
     {
         if (null !== $validation->getError()) {
             $this->initErrorStorage();
+            /** @psalm-suppress PossiblyNullReference */
             $this->error->addReason($validation->getError()->reason());
         }
     }
diff --git a/src/Validation/RFCValidation.php b/src/Validation/RFCValidation.php
index 7519cb1..89af864 100644
--- a/src/Validation/RFCValidation.php
+++ b/src/Validation/RFCValidation.php
@@ -20,7 +20,7 @@ class RFCValidation implements EmailValidation
     private $warnings = [];
 
     /**
-     * @var InvalidEmail
+     * @var ?InvalidEmail
      */
     private $error;
 
@@ -31,6 +31,7 @@ class RFCValidation implements EmailValidation
             $result = $this->parser->parse((string)$email);
             $this->warnings = $this->parser->getWarnings();
             if ($result->isInvalid()) {
+                /** @psalm-suppress PropertyTypeCoercion */
                 $this->error = $result;
                 return false;
             }