diff --git a/src/Generator/Client/Dto/Operation.php b/src/Generator/Client/Dto/Operation.php
index 3ff9cee..d597d4a 100644
--- a/src/Generator/Client/Dto/Operation.php
+++ b/src/Generator/Client/Dto/Operation.php
@@ -42,6 +42,7 @@ public function __construct(
         public array $queryStructNames,
         public ?string $bodyName,
         public ?string $bodyContentType,
+        public ?string $bodyContentShape,
         public array $imports,
     )
     {
diff --git a/src/Generator/Client/Dto/Response.php b/src/Generator/Client/Dto/Response.php
index f421d7a..d8ada11 100644
--- a/src/Generator/Client/Dto/Response.php
+++ b/src/Generator/Client/Dto/Response.php
@@ -35,6 +35,7 @@ public function __construct(
         public ?string $className = null,
         public ?Type $innerSchema = null,
         public ?string $contentType = null,
+        public ?string $contentShape = null,
     )
     {
     }
diff --git a/src/Generator/Client/Language/php-operation.php.twig b/src/Generator/Client/Language/php-operation.php.twig
index d9676b0..033bd12 100644
--- a/src/Generator/Client/Language/php-operation.php.twig
+++ b/src/Generator/Client/Language/php-operation.php.twig
@@ -24,6 +24,8 @@
             'headers' => [
 {% if operation.bodyContentType %}
                 'Content-Type' => '{{ operation.bodyContentType }}',
+{% elseif operation.bodyName %}
+                'Content-Type' => 'application/json'
 {% endif %}
             ],
             'query' => $this->parser->query([
@@ -36,14 +38,12 @@
 {% endfor %}
             ]),
 {% if operation.bodyName %}
-{% if operation.bodyContentType == 'application/octet-stream' or operation.bodyContentType == 'text/plain' %}
+{% if operation.bodyContentShape == 'application/octet-stream' or operation.bodyContentShape == 'application/xml' or operation.bodyContentShape == 'text/plain' %}
             'body' => ${{ operation.bodyName }}
-{% elseif operation.bodyContentType == 'application/x-www-form-urlencoded' %}
+{% elseif operation.bodyContentShape == 'application/x-www-form-urlencoded' %}
             'form_params' => ${{ operation.bodyName }}
-{% elseif operation.bodyContentType == 'multipart/form-data' %}
+{% elseif operation.bodyContentShape == 'multipart/form-data' %}
             'multipart' => ${{ operation.bodyName }}
-{% elseif operation.bodyContentType == 'application/xml' %}
-            'body' => ${{ operation.bodyName }}->saveXML()
 {% else %}
             'json' => ${{ operation.bodyName }}
 {% endif %}
@@ -80,21 +80,18 @@
 {% endfor %}
 
 {% macro response(payload, in_throw) %}
-{% if payload.contentType == 'application/octet-stream' %}
+{% if payload.contentShape == 'application/octet-stream' %}
             {% if in_throw %}    {% endif %}$data = $body;
-{% elseif payload.contentType == 'application/x-www-form-urlencoded' %}
+{% elseif payload.contentShape == 'application/x-www-form-urlencoded' %}
             {% if in_throw %}    {% endif %}$data = [];
             {% if in_throw %}    {% endif %}parse_str((string) $body, $data);
-{% elseif payload.contentType == 'application/json' %}
+{% elseif payload.contentShape == 'application/json' %}
             {% if in_throw %}    {% endif %}$data = \json_decode((string) $body);
-{% elseif payload.contentType == 'multipart/form-data' %}
+{% elseif payload.contentShape == 'multipart/form-data' %}
             {% if in_throw %}    {% endif %}// @TODO currently not possible, please create an issue at https://github.com/apioo/psx-api if needed
             {% if in_throw %}    {% endif %}$data = [];
-{% elseif payload.contentType == 'text/plain' %}
+{% elseif payload.contentShape == 'text/plain' or payload.contentShape == 'application/xml' %}
             {% if in_throw %}    {% endif %}$data = (string) $body;
-{% elseif payload.contentType == 'application/xml' %}
-            {% if in_throw %}    {% endif %}$data = new \DOMDocument();
-            {% if in_throw %}    {% endif %}$data->loadXML((string) $body);
 {% else %}
 {% if payload.innerSchema.isMap %}
             {% if in_throw %}    {% endif %}$data = $this->parser->parse((string) $body, {{ payload.innerSchema.type }}::class, isMap: true);
diff --git a/src/Generator/Client/Language/typescript-operation.ts.twig b/src/Generator/Client/Language/typescript-operation.ts.twig
index 606cf7d..81ea649 100644
--- a/src/Generator/Client/Language/typescript-operation.ts.twig
+++ b/src/Generator/Client/Language/typescript-operation.ts.twig
@@ -23,6 +23,8 @@
             headers: {
 {% if operation.bodyContentType %}
                 'Content-Type': '{{ operation.bodyContentType }}',
+{% elseif operation.bodyName %}
+                'Content-Type': 'application/json',
 {% endif %}
             },
             params: this.parser.query({
@@ -34,14 +36,12 @@
                 '{{ realName }}',
 {% endfor %}
             ]),
-{% if operation.return.contentType == 'application/octet-stream' %}
+{% if operation.return.contentShape == 'application/octet-stream' %}
             responseType: 'arraybuffer',
-{% elseif operation.return.contentType == 'application/json' %}
+{% elseif operation.return.contentShape == 'application/json' %}
             responseType: 'json',
-{% elseif operation.return.contentType == 'text/plain' %}
+{% elseif operation.return.contentShape == 'text/plain' or operation.return.contentShape == 'application/xml' %}
             responseType: 'text',
-{% elseif operation.return.contentType == 'application/xml' %}
-            responseType: 'document',
 {% endif %}
 {% if operation.bodyName %}
             data: {{ operation.bodyName }}
diff --git a/src/Generator/Client/LanguageBuilder.php b/src/Generator/Client/LanguageBuilder.php
index ef818ba..9f6ffec 100644
--- a/src/Generator/Client/LanguageBuilder.php
+++ b/src/Generator/Client/LanguageBuilder.php
@@ -150,7 +150,7 @@ private function getOperations(array $operations, DefinitionsInterface $definiti
             $imports = [];
             $path = $pathNames = [];
             $query = $queryNames = $queryStructNames = [];
-            $body = $bodyName = $bodyContentType = null;
+            $body = $bodyName = $bodyContentType = $bodyContentShape = null;
             foreach ($operation->getArguments()->getAll() as $name => $argument) {
                 $realName = $argument->getName();
                 if (empty($realName)) {
@@ -172,7 +172,8 @@ private function getOperations(array $operations, DefinitionsInterface $definiti
                     $bodyName = $normalized;
 
                     if ($argument->getSchema() instanceof ContentType) {
-                        $bodyContentType = $argument->getSchema()->value;
+                        $bodyContentType = $argument->getSchema()->toString();
+                        $bodyContentShape = $argument->getSchema()->getShape();
                     }
                 }
 
@@ -185,6 +186,7 @@ private function getOperations(array $operations, DefinitionsInterface $definiti
                 $body = null;
                 $bodyName = null;
                 $bodyContentType = null;
+                $bodyContentShape = null;
             }
 
             $arguments = array_merge($path, $body !== null ? [$bodyName => $body] : [], $query);
@@ -195,7 +197,14 @@ private function getOperations(array $operations, DefinitionsInterface $definiti
                 $returnType = $this->newType($returnSchema, false, $definitions, Type\GeneratorInterface::CONTEXT_CLIENT | Type\GeneratorInterface::CONTEXT_RESPONSE);
                 $innerSchema = $returnSchema instanceof TypeInterface ? $this->getInnerSchema($returnSchema, $definitions) : null;
 
-                $return = new Dto\Response($operation->getReturn()->getCode(), $returnType, null, $innerSchema, $returnSchema instanceof ContentType ? $returnSchema->value : null);
+                $return = new Dto\Response(
+                    $operation->getReturn()->getCode(),
+                    $returnType,
+                    null,
+                    $innerSchema,
+                    $returnSchema instanceof ContentType ? $returnSchema->toString() : null,
+                    $returnSchema instanceof ContentType ? $returnSchema->getShape() : null,
+                );
 
                 if ($returnSchema instanceof TypeInterface) {
                     $this->resolveImport($returnSchema, $imports);
@@ -217,7 +226,14 @@ private function getOperations(array $operations, DefinitionsInterface $definiti
                 $exceptionClassName = $this->naming->buildExceptionClassNameByType($throwSchema);
                 $exceptions[$exceptionClassName] = new Dto\Exception($exceptionClassName, $exceptionType, 'The server returned an error', $exceptionImports);
 
-                $throws[$throw->getCode()] = new Dto\Response($throw->getCode(), $exceptionType, $exceptionClassName, $innerSchema, $throwSchema instanceof ContentType ? $throwSchema->value : null);
+                $throws[$throw->getCode()] = new Dto\Response(
+                    $throw->getCode(),
+                    $exceptionType,
+                    $exceptionClassName,
+                    $innerSchema,
+                    $throwSchema instanceof ContentType ? $throwSchema->toString() : null,
+                    $throwSchema instanceof ContentType ? $throwSchema->getShape() : null,
+                );
 
                 $imports[$this->normalizer->file($exceptionClassName)] = $exceptionClassName;
             }
@@ -235,6 +251,7 @@ private function getOperations(array $operations, DefinitionsInterface $definiti
                 $queryStructNames,
                 $bodyName,
                 $bodyContentType,
+                $bodyContentShape,
                 $imports
             );
         }
diff --git a/src/Generator/Client/Util/Naming.php b/src/Generator/Client/Util/Naming.php
index b80a4df..52426b8 100644
--- a/src/Generator/Client/Util/Naming.php
+++ b/src/Generator/Client/Util/Naming.php
@@ -58,7 +58,7 @@ public function buildMethodNameByTag(string $tagName): string
     public function buildExceptionClassNameByType(TypeInterface|ContentType $type): string
     {
         if ($type instanceof ContentType) {
-            return match ($type) {
+            return match ($type->getShape()) {
                 ContentType::BINARY => 'BinaryException',
                 ContentType::FORM => 'FormException',
                 ContentType::JSON => 'JsonException',
diff --git a/src/Parser/Attribute.php b/src/Parser/Attribute.php
index b21ac18..41a677a 100644
--- a/src/Parser/Attribute.php
+++ b/src/Parser/Attribute.php
@@ -360,18 +360,16 @@ private function getSchemaFromTypeHint(?\ReflectionType $type): string|ContentTy
         if ($type instanceof \ReflectionNamedType) {
             if ($type->getName() === 'mixed') {
                 return Passthru::class;
-            } elseif ($type->getName() === \DOMDocument::class) {
-                return ContentType::XML;
             } elseif ($type->getName() === StreamInterface::class) {
-                return ContentType::BINARY;
+                return new ContentType(ContentType::BINARY);
             } elseif ($type->getName() === 'string') {
-                return ContentType::TEXT;
+                return new ContentType(ContentType::TEXT);
             } elseif ($type->getName() === 'PSX\\Data\\Body\\Json') {
-                return ContentType::JSON;
+                return new ContentType(ContentType::JSON);
             } elseif ($type->getName() === 'PSX\\Data\\Body\\Multipart') {
-                return ContentType::MULTIPART;
+                return new ContentType(ContentType::MULTIPART);
             } elseif ($type->getName() === 'PSX\\Data\\Body\\Form') {
-                return ContentType::FORM;
+                return new ContentType(ContentType::FORM);
             } elseif (class_exists($type->getName())) {
                 return $type->getName();
             }
diff --git a/src/Parser/TypeAPI.php b/src/Parser/TypeAPI.php
index 670f882..fe020a3 100644
--- a/src/Parser/TypeAPI.php
+++ b/src/Parser/TypeAPI.php
@@ -216,7 +216,7 @@ private function parseArgument(\stdClass $data): Operation\Argument
         }
 
         $contentType = $data->contentType ?? null;
-        if (is_string($contentType)) {
+        if (is_string($contentType) && !empty($contentType)) {
             $type = ContentType::from($contentType);
         } else {
             $schema = $data->schema ?? null;
diff --git a/tests/Generator/Client/resource/php/Client.php b/tests/Generator/Client/resource/php/Client.php
index 201d2ac..ff3ad54 100644
--- a/tests/Generator/Client/resource/php/Client.php
+++ b/tests/Generator/Client/resource/php/Client.php
@@ -88,6 +88,7 @@ public function create(string $name, string $type, EntryCreate $payload): EntryM
 
         $options = [
             'headers' => [
+                'Content-Type' => 'application/json'
             ],
             'query' => $this->parser->query([
             ], [
@@ -144,6 +145,7 @@ public function update(string $name, string $type, \PSX\Record\Record $payload):
 
         $options = [
             'headers' => [
+                'Content-Type' => 'application/json'
             ],
             'query' => $this->parser->query([
             ], [
@@ -237,6 +239,7 @@ public function patch(string $name, string $type, array $payload): array
 
         $options = [
             'headers' => [
+                'Content-Type' => 'application/json'
             ],
             'query' => $this->parser->query([
             ], [
diff --git a/tests/Generator/Client/resource/php_collection/BarTag.php b/tests/Generator/Client/resource/php_collection/BarTag.php
index 0bb0ded..98044df 100644
--- a/tests/Generator/Client/resource/php_collection/BarTag.php
+++ b/tests/Generator/Client/resource/php_collection/BarTag.php
@@ -66,6 +66,7 @@ public function put(EntryCreate $payload): EntryMessage
 
         $options = [
             'headers' => [
+                'Content-Type' => 'application/json'
             ],
             'query' => $this->parser->query([
             ], [
diff --git a/tests/Generator/Client/resource/php_collection/FooBarTag.php b/tests/Generator/Client/resource/php_collection/FooBarTag.php
index 9b59b39..ea20345 100644
--- a/tests/Generator/Client/resource/php_collection/FooBarTag.php
+++ b/tests/Generator/Client/resource/php_collection/FooBarTag.php
@@ -65,6 +65,7 @@ public function create(EntryCreate $payload): EntryMessage
 
         $options = [
             'headers' => [
+                'Content-Type' => 'application/json'
             ],
             'query' => $this->parser->query([
             ], [
diff --git a/tests/Generator/Client/resource/php_collection/FooBazTag.php b/tests/Generator/Client/resource/php_collection/FooBazTag.php
index 783b398..7e86da8 100644
--- a/tests/Generator/Client/resource/php_collection/FooBazTag.php
+++ b/tests/Generator/Client/resource/php_collection/FooBazTag.php
@@ -66,6 +66,7 @@ public function create(EntryCreate $payload): EntryMessage
 
         $options = [
             'headers' => [
+                'Content-Type' => 'application/json'
             ],
             'query' => $this->parser->query([
             ], [
diff --git a/tests/Generator/Client/resource/php_content_type/Client.php b/tests/Generator/Client/resource/php_content_type/Client.php
index 2128802..a1e0ef9 100644
--- a/tests/Generator/Client/resource/php_content_type/Client.php
+++ b/tests/Generator/Client/resource/php_content_type/Client.php
@@ -252,12 +252,12 @@ public function text(string $body): string
     }
 
     /**
-     * @param \DOMDocument $body
-     * @return \DOMDocument
+     * @param string $body
+     * @return string
      * @throws XmlException
      * @throws ClientException
      */
-    public function xml(\DOMDocument $body): \DOMDocument
+    public function xml(string $body): string
     {
         $url = $this->parser->url('/xml', [
         ]);
@@ -269,15 +269,14 @@ public function xml(\DOMDocument $body): \DOMDocument
             'query' => $this->parser->query([
             ], [
             ]),
-            'body' => $body->saveXML()
+            'body' => $body
         ];
 
         try {
             $response = $this->httpClient->request('POST', $url, $options);
             $body = $response->getBody();
 
-            $data = new \DOMDocument();
-            $data->loadXML((string) $body);
+            $data = (string) $body;
 
             return $data;
         } catch (ClientException $e) {
@@ -287,8 +286,7 @@ public function xml(\DOMDocument $body): \DOMDocument
             $statusCode = $e->getResponse()->getStatusCode();
 
             if ($statusCode === 500) {
-                $data = new \DOMDocument();
-                $data->loadXML((string) $body);
+                $data = (string) $body;
 
                 throw new XmlException($data);
             }
diff --git a/tests/Generator/Client/resource/php_content_type/XmlException.php b/tests/Generator/Client/resource/php_content_type/XmlException.php
index 195076d..b823f85 100644
--- a/tests/Generator/Client/resource/php_content_type/XmlException.php
+++ b/tests/Generator/Client/resource/php_content_type/XmlException.php
@@ -10,9 +10,9 @@
 
 class XmlException extends KnownStatusCodeException
 {
-    private \DOMDocument $payload;
+    private string $payload;
 
-    public function __construct(\DOMDocument $payload)
+    public function __construct(string $payload)
     {
         parent::__construct('The server returned an error');
 
@@ -20,9 +20,9 @@ public function __construct(\DOMDocument $payload)
     }
 
     /**
-     * @return \DOMDocument
+     * @return string
      */
-    public function getPayload(): \DOMDocument
+    public function getPayload(): string
     {
         return $this->payload;
     }
diff --git a/tests/Generator/Client/resource/php_test/ProductTag.php b/tests/Generator/Client/resource/php_test/ProductTag.php
index 51edae8..0356e7c 100644
--- a/tests/Generator/Client/resource/php_test/ProductTag.php
+++ b/tests/Generator/Client/resource/php_test/ProductTag.php
@@ -72,6 +72,7 @@ public function create(TestRequest $payload): TestResponse
 
         $options = [
             'headers' => [
+                'Content-Type' => 'application/json'
             ],
             'query' => $this->parser->query([
             ], [
@@ -114,6 +115,7 @@ public function update(int $id, TestRequest $payload): TestResponse
 
         $options = [
             'headers' => [
+                'Content-Type' => 'application/json'
             ],
             'query' => $this->parser->query([
             ], [
@@ -156,6 +158,7 @@ public function patch(int $id, TestRequest $payload): TestResponse
 
         $options = [
             'headers' => [
+                'Content-Type' => 'application/json'
             ],
             'query' => $this->parser->query([
             ], [
diff --git a/tests/Generator/Client/resource/typescript/Client.ts b/tests/Generator/Client/resource/typescript/Client.ts
index 4178423..89fe743 100644
--- a/tests/Generator/Client/resource/typescript/Client.ts
+++ b/tests/Generator/Client/resource/typescript/Client.ts
@@ -80,6 +80,7 @@ export class Client extends ClientAbstract {
             url: url,
             method: 'POST',
             headers: {
+                'Content-Type': 'application/json',
             },
             params: this.parser.query({
             }, [
@@ -127,6 +128,7 @@ export class Client extends ClientAbstract {
             url: url,
             method: 'PUT',
             headers: {
+                'Content-Type': 'application/json',
             },
             params: this.parser.query({
             }, [
@@ -209,6 +211,7 @@ export class Client extends ClientAbstract {
             url: url,
             method: 'PATCH',
             headers: {
+                'Content-Type': 'application/json',
             },
             params: this.parser.query({
             }, [
diff --git a/tests/Generator/Client/resource/typescript_collection/BarTag.ts b/tests/Generator/Client/resource/typescript_collection/BarTag.ts
index c74c137..57bfda9 100644
--- a/tests/Generator/Client/resource/typescript_collection/BarTag.ts
+++ b/tests/Generator/Client/resource/typescript_collection/BarTag.ts
@@ -61,6 +61,7 @@ export class BarTag extends TagAbstract {
             url: url,
             method: 'POST',
             headers: {
+                'Content-Type': 'application/json',
             },
             params: this.parser.query({
             }, [
diff --git a/tests/Generator/Client/resource/typescript_collection/FooBarTag.ts b/tests/Generator/Client/resource/typescript_collection/FooBarTag.ts
index 7515f6a..c2f895f 100644
--- a/tests/Generator/Client/resource/typescript_collection/FooBarTag.ts
+++ b/tests/Generator/Client/resource/typescript_collection/FooBarTag.ts
@@ -62,6 +62,7 @@ export class FooBarTag extends TagAbstract {
             url: url,
             method: 'POST',
             headers: {
+                'Content-Type': 'application/json',
             },
             params: this.parser.query({
             }, [
diff --git a/tests/Generator/Client/resource/typescript_collection/FooBazTag.ts b/tests/Generator/Client/resource/typescript_collection/FooBazTag.ts
index 5fa0678..5398d23 100644
--- a/tests/Generator/Client/resource/typescript_collection/FooBazTag.ts
+++ b/tests/Generator/Client/resource/typescript_collection/FooBazTag.ts
@@ -61,6 +61,7 @@ export class FooBazTag extends TagAbstract {
             url: url,
             method: 'POST',
             headers: {
+                'Content-Type': 'application/json',
             },
             params: this.parser.query({
             }, [
diff --git a/tests/Generator/Client/resource/typescript_content_type/Client.ts b/tests/Generator/Client/resource/typescript_content_type/Client.ts
index 0303723..aebd6e8 100644
--- a/tests/Generator/Client/resource/typescript_content_type/Client.ts
+++ b/tests/Generator/Client/resource/typescript_content_type/Client.ts
@@ -225,11 +225,11 @@ export class Client extends ClientAbstract {
     }
 
     /**
-     * @returns {Promise<XMLDocument>}
+     * @returns {Promise<string>}
      * @throws {XmlException}
      * @throws {ClientException}
      */
-    public async xml(body: XMLDocument): Promise<XMLDocument> {
+    public async xml(body: string): Promise<string> {
         const url = this.parser.url('/xml', {
         });
 
@@ -242,12 +242,12 @@ export class Client extends ClientAbstract {
             params: this.parser.query({
             }, [
             ]),
-            responseType: 'document',
+            responseType: 'text',
             data: body
         };
 
         try {
-            const response = await this.httpClient.request<XMLDocument>(params);
+            const response = await this.httpClient.request<string>(params);
             return response.data;
         } catch (error) {
             if (error instanceof ClientException) {
diff --git a/tests/Generator/Client/resource/typescript_content_type/XmlException.ts b/tests/Generator/Client/resource/typescript_content_type/XmlException.ts
index 8076033..747b495 100644
--- a/tests/Generator/Client/resource/typescript_content_type/XmlException.ts
+++ b/tests/Generator/Client/resource/typescript_content_type/XmlException.ts
@@ -8,11 +8,11 @@ import {KnownStatusCodeException} from "sdkgen-client"
 
 export class XmlException extends KnownStatusCodeException {
 
-    public constructor(private payload: XMLDocument) {
+    public constructor(private payload: string) {
         super('The server returned an error');
     }
 
-    public getPayload(): XMLDocument {
+    public getPayload(): string {
         return this.payload;
     }
 
diff --git a/tests/Generator/Client/resource/typescript_test/ProductTag.ts b/tests/Generator/Client/resource/typescript_test/ProductTag.ts
index 882554e..1af2797 100644
--- a/tests/Generator/Client/resource/typescript_test/ProductTag.ts
+++ b/tests/Generator/Client/resource/typescript_test/ProductTag.ts
@@ -64,6 +64,7 @@ export class ProductTag extends TagAbstract {
             url: url,
             method: 'POST',
             headers: {
+                'Content-Type': 'application/json',
             },
             params: this.parser.query({
             }, [
@@ -102,6 +103,7 @@ export class ProductTag extends TagAbstract {
             url: url,
             method: 'PUT',
             headers: {
+                'Content-Type': 'application/json',
             },
             params: this.parser.query({
             }, [
@@ -140,6 +142,7 @@ export class ProductTag extends TagAbstract {
             url: url,
             method: 'PATCH',
             headers: {
+                'Content-Type': 'application/json',
             },
             params: this.parser.query({
             }, [
diff --git a/tests/Generator/GeneratorTestCase.php b/tests/Generator/GeneratorTestCase.php
index c4496f5..81833e6 100644
--- a/tests/Generator/GeneratorTestCase.php
+++ b/tests/Generator/GeneratorTestCase.php
@@ -201,29 +201,29 @@ protected function getSpecificationContentType(): SpecificationInterface
     {
         $builder = $this->apiManager->getBuilder();
 
-        $operation = $builder->addOperation('binary', 'POST', '/binary', 200, ContentType::BINARY);
-        $operation->addArgument('body', 'body', ContentType::BINARY);
-        $operation->addThrow(999, ContentType::BINARY);
+        $operation = $builder->addOperation('binary', 'POST', '/binary', 200, new ContentType(ContentType::BINARY));
+        $operation->addArgument('body', 'body', new ContentType(ContentType::BINARY));
+        $operation->addThrow(999, new ContentType(ContentType::BINARY));
 
-        $operation = $builder->addOperation('form', 'POST', '/form', 200, ContentType::FORM);
-        $operation->addArgument('body', 'body', ContentType::FORM);
-        $operation->addThrow(599, ContentType::FORM);
+        $operation = $builder->addOperation('form', 'POST', '/form', 200, new ContentType(ContentType::FORM));
+        $operation->addArgument('body', 'body', new ContentType(ContentType::FORM));
+        $operation->addThrow(599, new ContentType(ContentType::FORM));
 
-        $operation = $builder->addOperation('json', 'POST', '/json', 200, ContentType::JSON);
-        $operation->addArgument('body', 'body', ContentType::JSON);
-        $operation->addThrow(499, ContentType::JSON);
+        $operation = $builder->addOperation('json', 'POST', '/json', 200, new ContentType(ContentType::JSON));
+        $operation->addArgument('body', 'body', new ContentType(ContentType::JSON));
+        $operation->addThrow(499, new ContentType(ContentType::JSON));
 
-        $operation = $builder->addOperation('multipart', 'POST', '/multipart', 200, ContentType::MULTIPART);
-        $operation->addArgument('body', 'body', ContentType::MULTIPART);
-        $operation->addThrow(500, ContentType::MULTIPART);
+        $operation = $builder->addOperation('multipart', 'POST', '/multipart', 200, new ContentType(ContentType::MULTIPART));
+        $operation->addArgument('body', 'body', new ContentType(ContentType::MULTIPART));
+        $operation->addThrow(500, new ContentType(ContentType::MULTIPART));
 
-        $operation = $builder->addOperation('text', 'POST', '/text', 200, ContentType::TEXT);
-        $operation->addArgument('body', 'body', ContentType::TEXT);
-        $operation->addThrow(500, ContentType::TEXT);
+        $operation = $builder->addOperation('text', 'POST', '/text', 200, new ContentType(ContentType::TEXT));
+        $operation->addArgument('body', 'body', new ContentType(ContentType::TEXT));
+        $operation->addThrow(500, new ContentType(ContentType::TEXT));
 
-        $operation = $builder->addOperation('xml', 'POST', '/xml', 200, ContentType::XML);
-        $operation->addArgument('body', 'body', ContentType::XML);
-        $operation->addThrow(500, ContentType::XML);
+        $operation = $builder->addOperation('xml', 'POST', '/xml', 200, new ContentType(ContentType::XML));
+        $operation->addArgument('body', 'body', new ContentType(ContentType::XML));
+        $operation->addThrow(500, new ContentType(ContentType::XML));
 
         return $builder->getSpecification();
     }
diff --git a/tests/Generator/Server/resource/php_content_type/src/Controller/App.php b/tests/Generator/Server/resource/php_content_type/src/Controller/App.php
index 2b1103a..f46380a 100644
--- a/tests/Generator/Server/resource/php_content_type/src/Controller/App.php
+++ b/tests/Generator/Server/resource/php_content_type/src/Controller/App.php
@@ -64,7 +64,7 @@ public function text(#[Body] string $body): string
     #[Post]
     #[Path('/xml')]
     #[StatusCode(200)]
-    public function xml(#[Body] \DOMDocument $body): \DOMDocument
+    public function xml(#[Body] string $body): string
     {
         // @TODO implement method
     }
diff --git a/tests/Generator/Server/resource/typescript_content_type/src/controller/app.controller.ts b/tests/Generator/Server/resource/typescript_content_type/src/controller/app.controller.ts
index 944c6f7..f9f8644 100644
--- a/tests/Generator/Server/resource/typescript_content_type/src/controller/app.controller.ts
+++ b/tests/Generator/Server/resource/typescript_content_type/src/controller/app.controller.ts
@@ -44,7 +44,7 @@ export class AppController {
 
   @Post('/xml')
   @HttpCode(200)
-  xml(@Body() body: XMLDocument): XMLDocument {
+  xml(@Body() body: string): string {
     // @TODO implement method
     return {};
   }
diff --git a/tests/Parser/Attribute/ContentTypeController.php b/tests/Parser/Attribute/ContentTypeController.php
index bb8c4cd..bb92251 100644
--- a/tests/Parser/Attribute/ContentTypeController.php
+++ b/tests/Parser/Attribute/ContentTypeController.php
@@ -78,12 +78,4 @@ protected function json(#[Body] Json $body): Json
     {
         return $body;
     }
-
-    #[Post]
-    #[Path('/xml')]
-    #[OperationId('xml')]
-    protected function xml(#[Body] \DOMDocument $body): \DOMDocument
-    {
-        return new \DOMDocument();
-    }
 }
diff --git a/tests/Parser/AttributeTest.php b/tests/Parser/AttributeTest.php
index a5a82d6..5a028ff 100644
--- a/tests/Parser/AttributeTest.php
+++ b/tests/Parser/AttributeTest.php
@@ -121,10 +121,5 @@ public function testParseContentType()
         $this->assertInstanceOf(OperationInterface::class, $operation);
         $this->assertEquals(ContentType::JSON, $operation->getArguments()->get('body')->getSchema());
         $this->assertEquals(ContentType::JSON, $operation->getReturn()->getSchema());
-
-        $operation = $specification->getOperations()->get('xml');
-        $this->assertInstanceOf(OperationInterface::class, $operation);
-        $this->assertEquals(ContentType::XML, $operation->getArguments()->get('body')->getSchema());
-        $this->assertEquals(ContentType::XML, $operation->getReturn()->getSchema());
     }
 }