diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index d12a599c7..be88d756c 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -33,32 +33,6 @@ parameters:
             path: src/Utils/Utils.php
             count: 2
 
-        # In PHP 8.2, PHPStan no longer believes @property works without magic methods,
-        # but all implementors of the interfaces actually have those properties.
-        -
-            message: "~Access to an undefined property .*GraphQL\\\\Type\\\\Definition\\\\NamedType.*::\\$name~"
-            reportUnmatched: false
-        -
-            message: "~Access to an undefined property .*GraphQL\\\\Type\\\\Definition\\\\NamedType.*::\\$description~"
-            reportUnmatched: false
-        -
-            message: "~Access to an undefined property .*GraphQL\\\\Type\\\\Definition\\\\NamedType.*::\\$astNode~"
-            reportUnmatched: false
-        -
-            message: "~Access to an undefined property .*GraphQL\\\\Type\\\\Definition\\\\NamedType.*::\\$extensionASTNodes~"
-            reportUnmatched: false
-        -
-            message: "~Access to an undefined property .*GraphQL\\\\Language\\\\AST\\\\TypeDefinitionNode.*::\\$name~"
-            reportUnmatched: false
-        -
-            message: "~Access to an undefined property .*GraphQL\\\\Language\\\\AST\\\\TypeExtensionNode.*::\\$name~"
-            reportUnmatched: false
-
-        # In PHP 8.2, PHPStan seems to not allow dynamic checks for properties on classes, even when they are not final.
-        -
-            message: "~Call to function property_exists\\(\\) with .* will always evaluate to false\\.~"
-            reportUnmatched: false
-
         # PHPStan does not play nicely with markTestSkipped()
         - message: "~Unreachable statement - code above always terminates~"
           path: tests
diff --git a/src/Type/Definition/Argument.php b/src/Type/Definition/Argument.php
index 136faa55b..27c62abc3 100644
--- a/src/Type/Definition/Argument.php
+++ b/src/Type/Definition/Argument.php
@@ -108,6 +108,8 @@ public function assertValid(FieldDefinition $parentField, Type $parentType): voi
     {
         $error = Utils::isValidNameError($this->name);
         if ($error !== null) {
+            assert($parentType instanceof NamedType);
+
             throw new InvariantViolation("{$parentType->name}.{$parentField->name}({$this->name}:) {$error->getMessage()}");
         }