diff --git a/tests/ServerInterop/MTOM.php b/tests/ServerInterop/MTOM.php
new file mode 100644
index 0000000..4f815b9
--- /dev/null
+++ b/tests/ServerInterop/MTOM.php
@@ -0,0 +1,61 @@
+<?php
+
+use BeSimple\SoapCommon\Helper as BeSimpleSoapHelper;
+use BeSimple\SoapClient\SoapClient as BeSimpleSoapClient;
+
+require '../bootstrap.php';
+
+class base64Binary
+{
+    public $_;
+    public $contentType;
+}
+
+class AttachmentType
+{
+    public $fileName;
+    public $binaryData;
+}
+
+class AttachmentRequest extends AttachmentType
+{
+}
+
+$options = array(
+    'soap_version'    => SOAP_1_1,
+    'features'        => SOAP_SINGLE_ELEMENT_ARRAYS, // make sure that result is array for size=1
+    'trace'           => true, // enables use of the methods  SoapClient->__getLastRequest,  SoapClient->__getLastRequestHeaders,  SoapClient->__getLastResponse and  SoapClient->__getLastResponseHeaders
+    'attachment_type' => BeSimpleSoapHelper::ATTACHMENTS_TYPE_MTOM,
+    'cache_wsdl'      => WSDL_CACHE_NONE,
+    'classmap'        => array(
+        'base64Binary'      => 'base64Binary',
+        'AttachmentRequest' => 'AttachmentRequest',
+    ),
+);
+
+$sc = new BeSimpleSoapClient('MTOM.wsdl', $options);
+
+//var_dump($sc->__getFunctions());
+//var_dump($sc->__getTypes());
+
+try {
+    $b64 = new base64Binary();
+    $b64->_ = 'This is a test. :)';
+    $b64->contentType = 'text/plain';
+
+    $attachment = new AttachmentRequest();
+    $attachment->fileName = 'test123.txt';
+    $attachment->binaryData = $b64;
+
+    var_dump($sc->attachment($attachment));
+
+} catch (Exception $e) {
+    var_dump($e);
+}
+
+// var_dump(
+//     $sc->__getLastRequestHeaders(),
+//     $sc->__getLastRequest(),
+//     $sc->__getLastResponseHeaders(),
+//     $sc->__getLastResponse()
+// );
\ No newline at end of file
diff --git a/tests/ServerInterop/MTOM.wsdl b/tests/ServerInterop/MTOM.wsdl
new file mode 100644
index 0000000..7772015
--- /dev/null
+++ b/tests/ServerInterop/MTOM.wsdl
@@ -0,0 +1,89 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<definitions targetNamespace="http://ws.apache.org/axis2/mtomsample/" xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:wsaw="http://www.w3.org/2006/05/addressing/wsdl" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:tns="http://ws.apache.org/axis2/mtomsample/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xmime="http://www.w3.org/2005/05/xmlmime" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/">
+  <types>
+    <xsd:schema attributeFormDefault="qualified" elementFormDefault="qualified" targetNamespace="http://ws.apache.org/axis2/mtomsample/" xmlns="http://schemas.xmlsoap.org/wsdl/">
+            <xsd:import namespace="http://www.w3.org/2005/05/xmlmime"/>
+            <xsd:complexType name="AttachmentType">
+                <xsd:sequence>
+                    <xsd:element minOccurs="0" name="fileName" type="xsd:string"/>
+                    <xsd:element minOccurs="0" name="binaryData" type="xmime:base64Binary"/>
+                </xsd:sequence>
+            </xsd:complexType>
+            <xsd:element name="AttachmentRequest" type="tns:AttachmentType"/>
+            <xsd:element name="AttachmentResponse" type="xsd:string"/>
+        </xsd:schema>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xmime="http://www.w3.org/2005/05/xmlmime" attributeFormDefault="unqualified" elementFormDefault="unqualified" targetNamespace="http://www.w3.org/2005/05/xmlmime">
+<xs:attribute name="contentType">
+<xs:simpleType>
+<xs:restriction base="xs:string">
+<xs:minLength value="3"/>
+</xs:restriction>
+</xs:simpleType>
+</xs:attribute>
+<xs:attribute name="expectedContentTypes" type="xs:string"/>
+<xs:complexType name="base64Binary">
+<xs:simpleContent>
+<xs:extension base="xs:base64Binary">
+<xs:attribute ref="xmime:contentType"/>
+</xs:extension>
+</xs:simpleContent>
+</xs:complexType>
+<xs:complexType name="hexBinary">
+<xs:simpleContent>
+<xs:extension base="xs:hexBinary">
+<xs:attribute ref="xmime:contentType"/>
+</xs:extension>
+</xs:simpleContent>
+</xs:complexType>
+</xs:schema>
+
+  </types>
+  <message name="AttachmentResponse">
+    <part name="part1" element="tns:AttachmentResponse">
+    </part>
+  </message>
+  <message name="AttachmentRequest">
+    <part name="part1" element="tns:AttachmentRequest">
+    </part>
+  </message>
+  <portType name="MTOMServicePortType">
+    <operation name="attachment">
+      <input message="tns:AttachmentRequest" wsaw:Action="attachment">
+    </input>
+      <output message="tns:AttachmentResponse" wsaw:Action="http://schemas.xmlsoap.org/wsdl/MTOMServicePortType/AttachmentResponse">
+    </output>
+    </operation>
+  </portType>
+  <binding name="MTOMServiceSOAP11Binding" type="tns:MTOMServicePortType">
+    <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
+    <operation name="attachment">
+      <soap:operation soapAction="attachment" style="document"/>
+      <input>
+        <soap:body use="literal"/>
+      </input>
+      <output>
+        <soap:body use="literal"/>
+      </output>
+    </operation>
+  </binding>
+  <binding name="MTOMServiceSOAP12Binding" type="tns:MTOMServicePortType">
+    <soap12:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
+    <operation name="attachment">
+      <soap12:operation soapAction="attachment" style="document"/>
+      <input>
+        <soap12:body use="literal"/>
+      </input>
+      <output>
+        <soap12:body use="literal"/>
+      </output>
+    </operation>
+  </binding>
+  <service name="MTOMSample">
+    <port name="MTOMSampleSOAP12port_http" binding="tns:MTOMServiceSOAP12Binding">
+      <soap12:address location="http://web/BeSimpleSoapClient/tests/ServerInterop/MTOMServer.php"/>
+    </port>
+    <port name="MTOMSampleSOAP11port_http" binding="tns:MTOMServiceSOAP11Binding">
+      <soap:address location="http://web/BeSimpleSoapClient/tests/ServerInterop/MTOMServer.php"/>
+    </port>
+  </service>
+</definitions>
diff --git a/tests/ServerInterop/MTOMServer.php b/tests/ServerInterop/MTOMServer.php
new file mode 100644
index 0000000..5deee38
--- /dev/null
+++ b/tests/ServerInterop/MTOMServer.php
@@ -0,0 +1,53 @@
+<?php
+
+use BeSimple\SoapCommon\Helper as BeSimpleSoapHelper;
+use BeSimple\SoapServer\SoapServer as BeSimpleSoapServer;
+
+require '../../../BeSimpleSoapServer/tests/bootstrap.php';
+
+class base64Binary
+{
+    public $_;
+    public $contentType;
+}
+
+class AttachmentType
+{
+    public $fileName;
+    public $binaryData;
+}
+
+class AttachmentRequest extends AttachmentType
+{
+}
+
+$options = array(
+    'soap_version'    => SOAP_1_1,
+    'features'        => SOAP_SINGLE_ELEMENT_ARRAYS, // make sure that result is array for size=1
+    'attachment_type' => BeSimpleSoapHelper::ATTACHMENTS_TYPE_MTOM,
+    'cache_wsdl'      => WSDL_CACHE_NONE,
+    'classmap'        => array(
+        'base64Binary'      => 'base64Binary',
+        'AttachmentRequest' => 'AttachmentRequest',
+    ),
+);
+
+class Mtom
+{
+    public function attachment(AttachmentRequest $attachment)
+    {
+        $b64 = $attachment->binaryData;
+
+        file_put_contents('test.txt', var_export(array(
+            $attachment->fileName,
+            $b64->_,
+            $b64->contentType
+        ), true));
+
+        return 'done';
+    }
+}
+
+$ss = new BeSimpleSoapServer('MTOM.wsdl', $options);
+$ss->setClass('Mtom');
+$ss->handle();