diff --git a/Command/DumpCommand.php b/Command/DumpCommand.php
index 8b86b23..f1b6271 100644
--- a/Command/DumpCommand.php
+++ b/Command/DumpCommand.php
@@ -27,8 +27,6 @@ class DumpCommand extends Command
 
     /**
      * DumpCommand constructor.
-     *
-     * @param ContainerInterface $generatorLocator
      */
     public function __construct(ContainerInterface $generatorLocator)
     {
@@ -50,9 +48,6 @@ class DumpCommand extends Command
     }
 
     /**
-     * @param InputInterface  $input
-     * @param OutputInterface $output
-     *
      * @throws InvalidArgumentException If the area to dump is not valid
      *
      * @return int|void
diff --git a/ModelDescriber/ObjectModelDescriber.php b/ModelDescriber/ObjectModelDescriber.php
index d42ac93..aaedea9 100644
--- a/ModelDescriber/ObjectModelDescriber.php
+++ b/ModelDescriber/ObjectModelDescriber.php
@@ -85,7 +85,7 @@ class ObjectModelDescriber implements ModelDescriberInterface, ModelRegistryAwar
                 $serializedName = $annotationsReader->getPropertyName($reflection, $serializedName);
             }
 
-          $property = Util::getProperty($schema, $annotationsReader->getPropertyName($reflection, $serializedName));
+            $property = Util::getProperty($schema, $annotationsReader->getPropertyName($reflection, $serializedName));
 
             // Interpret additional options
             $groups = $model->getGroups();
diff --git a/OpenApiPhp/ModelRegister.php b/OpenApiPhp/ModelRegister.php
index bef46c9..a9567b2 100644
--- a/OpenApiPhp/ModelRegister.php
+++ b/OpenApiPhp/ModelRegister.php
@@ -54,7 +54,7 @@ final class ModelRegister
 
             // Misusage of ::$ref
             if (($annotation instanceof OA\Response || $annotation instanceof OA\RequestBody) && $annotation->ref instanceof ModelAnnotation) {
-              throw new \InvalidArgumentException(sprintf('Using @Model inside @%s::$ref is not allowed. You should use ::$ref with @Property, @Parameter, @Schema, @Items but within @Response or @RequestBody you should put @Model directly at the root of the annotation : `@Response(..., @Model(...))`.', get_class($annotation)));
+                throw new \InvalidArgumentException(sprintf('Using @Model inside @%s::$ref is not allowed. You should use ::$ref with @Property, @Parameter, @Schema, @Items but within @Response or @RequestBody you should put @Model directly at the root of the annotation : `@Response(..., @Model(...))`.', get_class($annotation)));
             }
 
             // Implicit usages
diff --git a/OpenApiPhp/Util.php b/OpenApiPhp/Util.php
index 9ca9690..6cf7a48 100644
--- a/OpenApiPhp/Util.php
+++ b/OpenApiPhp/Util.php
@@ -65,10 +65,7 @@ final class Util
      * @see OA\OpenApi::$paths
      * @see OA\PathItem::path
      *
-     * @param OA\OpenApi $api
-     * @param string     $path
-     *
-     * @return OA\PathItem
+     * @param string $path
      */
     public static function getPath(OA\OpenApi $api, $path): OA\PathItem
     {
@@ -79,10 +76,7 @@ final class Util
      * Return an existing Schema object from $api->components->schemas[] having its member schema set to $schema.
      * Create, add to $api->components->schemas[] and return this new Schema object and set the property if none found.
      *
-     * @param OA\OpenApi $api
-     * @param string     $schema
-     *
-     * @return OA\Schema
+     * @param string $schema
      *
      * @see OA\Schema::$schema
      * @see OA\Components::$schemas
@@ -106,10 +100,7 @@ final class Util
      * @see OA\Schema::$properties
      * @see OA\Property::$property
      *
-     * @param OA\Schema $schema
-     * @param string    $property
-     *
-     * @return OA\Property
+     * @param string $property
      */
     public static function getProperty(OA\Schema $schema, $property): OA\Property
     {
@@ -128,10 +119,7 @@ final class Util
      * @see OA\PathItem::$options
      * @see OA\PathItem::$head
      *
-     * @param OA\PathItem $path
-     * @param string      $method
-     *
-     * @return OA\Operation
+     * @param string $method
      */
     public static function getOperation(OA\PathItem $path, $method): OA\Operation
     {
@@ -151,11 +139,8 @@ final class Util
      * @see OA\Parameter::$name
      * @see OA\Parameter::$in
      *
-     * @param OA\Operation $operation
-     * @param string       $name
-     * @param string       $in
-     *
-     * @return OA\Parameter
+     * @param string $name
+     * @param string $in
      */
     public static function getOperationParameter(OA\Operation $operation, $name, $in): OA\Parameter
     {
@@ -171,11 +156,7 @@ final class Util
      *
      * @see OA\AbstractAnnotation::$_nested
      *
-     * @param OA\AbstractAnnotation $parent
      * @param $class
-     * @param array $properties
-     *
-     * @return OA\AbstractAnnotation
      */
     public static function getChild(OA\AbstractAnnotation $parent, $class, array $properties = []): OA\AbstractAnnotation
     {
@@ -201,11 +182,7 @@ final class Util
      *
      * @see OA\AbstractAnnotation::$_nested
      *
-     * @param OA\AbstractAnnotation $parent
-     * @param string                $class
-     * @param array                 $properties
-     *
-     * @return OA\AbstractAnnotation
+     * @param string $class
      */
     public static function getCollectionItem(OA\AbstractAnnotation $parent, $class, array $properties = []): OA\AbstractAnnotation
     {
@@ -238,11 +215,8 @@ final class Util
      *
      * @see OA\AbstractAnnotation::$_nested
      *
-     * @param OA\AbstractAnnotation $parent
-     * @param string                $class
-     * @param mixed                 $value
-     *
-     * @return OA\AbstractAnnotation
+     * @param string $class
+     * @param mixed  $value
      */
     public static function getIndexedCollectionItem(OA\AbstractAnnotation $parent, $class, $value): OA\AbstractAnnotation
     {
@@ -266,9 +240,6 @@ final class Util
      * Search for an Annotation within $collection that has all members set
      * to the respective values in the associative array $properties.
      *
-     * @param array $collection
-     * @param array $properties
-     *
      * @return int|string|null
      */
     public static function searchCollectionItem(array $collection, array $properties)
@@ -289,7 +260,6 @@ final class Util
     /**
      * Search for an Annotation within the $collection that has its member $index set to $value.
      *
-     * @param array  $collection
      * @param string $member
      * @param mixed  $value
      *
@@ -304,12 +274,8 @@ final class Util
      * Create a new Object of $class with members $properties within $parent->{$collection}[]
      * and return the created index.
      *
-     * @param OA\AbstractAnnotation $parent
-     * @param string                $collection
-     * @param string                $class
-     * @param array                 $properties
-     *
-     * @return int
+     * @param string $collection
+     * @param string $class
      */
     public static function createCollectionItem(OA\AbstractAnnotation $parent, $collection, $class, array $properties = []): int
     {
@@ -326,14 +292,9 @@ final class Util
     /**
      * Create a new Object of $class with members $properties and set the context parent to be $parent.
      *
-     *
-     * @param OA\AbstractAnnotation $parent
-     * @param string                $class
-     * @param array                 $properties
+     * @param string $class
      *
      * @throws \InvalidArgumentException at an attempt to pass in properties that are found in $parent::$_nested
-     *
-     * @return OA\AbstractAnnotation
      */
     public static function createChild(OA\AbstractAnnotation $parent, $class, array $properties = []): OA\AbstractAnnotation
     {
@@ -352,11 +313,6 @@ final class Util
      * Create a new Context with members $properties and parent context $parent.
      *
      * @see Context
-     *
-     * @param array        $properties
-     * @param Context|null $parent
-     *
-     * @return Context
      */
     public static function createContext(array $properties = [], Context $parent = null): Context
     {
@@ -371,9 +327,7 @@ final class Util
      * The main purpose is to create a Swagger Object from array config values
      * in the structure of a json serialized Swagger object.
      *
-     * @param OA\AbstractAnnotation                    $annotation
      * @param array|\ArrayObject|OA\AbstractAnnotation $from
-     * @param bool                                     $overwrite
      */
     public static function merge(OA\AbstractAnnotation $annotation, $from, bool $overwrite = false)
     {
@@ -496,42 +450,7 @@ final class Util
             function ($value) {
                 return \is_array($value) ? $value[0] : $value;
             },
-            self::getNesting($class) ?? []
+            $class::$_nested
         ));
     }
-
-    private static function getNesting($class)
-    {
-        switch ($class) {
-            case OA\OpenApi::class:
-                return OA\OpenApi::$_nested;
-            case OA\Info::class:
-                return OA\Info::$_nested;
-            case OA\PathItem::class:
-                return OA\PathItem::$_nested;
-            case OA\Get::class:
-            case OA\Post::class:
-            case OA\Put::class:
-            case OA\Delete::class:
-            case OA\Patch::class:
-            case OA\Head::class:
-            case OA\Options::class:
-                return OA\Operation::$_nested;
-            case OA\Parameter::class:
-                return OA\Parameter::$_nested;
-            case OA\Items::class:
-                return OA\Items::$_nested;
-            case OA\Property::class:
-            case OA\Schema::class:
-                return OA\Schema::$_nested;
-            case OA\Tag::class:
-                return OA\Tag::$_nested;
-            case OA\Response::class:
-                return OA\Response::$_nested;
-            case OA\Header::class:
-                return OA\Header::$_nested;
-            default:
-                return null;
-        }
-    }
 }
diff --git a/Tests/Functional/TestKernel.php b/Tests/Functional/TestKernel.php
index 57b5674..828ba08 100644
--- a/Tests/Functional/TestKernel.php
+++ b/Tests/Functional/TestKernel.php
@@ -169,6 +169,12 @@ class TestKernel extends Kernel
         // Filter routes
         $c->loadFromExtension('nelmio_api_doc', [
             'documentation' => [
+                'servers' => [ // from https://github.com/nelmio/NelmioApiDocBundle/issues/1691
+                    [
+                        'url' => 'https://api.example.com/secured/{version}',
+                        'variables' => ['version' => ['default' => 'v1']],
+                    ],
+                ],
                 'info' => [
                     'title' => 'My Default App',
                 ],