diff --git a/phpstan.neon b/phpstan.neon
index 01c253538..a0777a0c8 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -14,9 +14,6 @@ parameters:
     - '#\Drupal calls should be avoided in classes, use dependency injection instead#'
     # new static() is a best practice in Drupal, so we cannot fix that.
     - "#^Unsafe usage of new static\\(\\)\\.$#"
-    # Drupal allows object property access to custom fields, so we cannot fix
-    # that.
-    - "#^Access to an undefined property Drupal\\\\#"
     # We forgot to use return type hints on some interfaces, cannot be changed
     # in stable 4.0.
     # @todo use return type hints everywhere for 5.0.
diff --git a/src/Plugin/GraphQL/DataProducer/Entity/Fields/Image/ImageDerivative.php b/src/Plugin/GraphQL/DataProducer/Entity/Fields/Image/ImageDerivative.php
index d2d7449de..8e00464fa 100644
--- a/src/Plugin/GraphQL/DataProducer/Entity/Fields/Image/ImageDerivative.php
+++ b/src/Plugin/GraphQL/DataProducer/Entity/Fields/Image/ImageDerivative.php
@@ -98,7 +98,9 @@ public function resolve(FileInterface $entity = NULL, $style, RefinableCacheable
     $metadata->addCacheableDependency($access);
     if ($access->isAllowed() && $image_style = ImageStyle::load($style)) {
 
+      // @phpstan-ignore-next-line
       $width = $entity->width;
+      // @phpstan-ignore-next-line
       $height = $entity->height;
 
       if (empty($width) || empty($height)) {
diff --git a/tests/src/Traits/MockingTrait.php b/tests/src/Traits/MockingTrait.php
index 85f3a74a8..4b8dd2b83 100644
--- a/tests/src/Traits/MockingTrait.php
+++ b/tests/src/Traits/MockingTrait.php
@@ -106,7 +106,7 @@ protected function setUpSchema($schema, $id = 'test', array $values = []): void
   protected function createTestServer($schema, $endpoint, array $values = []): void {
     $this->server = Server::create([
       'schema' => $schema,
-      'name' => $this->randomGenerator->name(),
+      'name' => $this->randomMachineName(),
       'endpoint' => $endpoint,
     ] + $values);