Not understanding how root xml element is defined by schema

There is something really basic that I am apparently failing to understand, and I'm hoping someone can help. Below, I have built a really simple XML schema and XML document. Both are well-formed. But I am getting the following error when I try to validate the document against the schema:

Not valid.
Error - Line 2, 17: org.xml.sax.SAXParseException; lineNumber: 2; columnNumber: 17; 
cvc-elt.1: Cannot find the declaration of element 'SpecialRequest'.

I am using an online validator that I found here: http://ift.tt/1btEHxy

Here is my schema and XML.

Schema:

<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:tns="com.example.test" 
          elementFormDefault="qualified" 
          targetNamespace="com.example.test" 
          xmlns:xs="http://ift.tt/tphNwY">
  <xs:complexType name="SpecialRequest">
    <xs:sequence>
      <xs:element name="content_type" nillable="true" type="xs:string" />
      <xs:element name="content_data" nillable="true" type="xs:string" />
    </xs:sequence>
  </xs:complexType>
  <xs:element name="SpecialRequest" type="tns:SpecialRequest" />
 </xs:schema>

XML:

<?xml version="1.0" encoding="UTF-8"?>
<SpecialRequest>
</SpecialRequest>

The validator can't find the SpecialRequest element. I don't get it. What am I missing? Thanks.

P.S.

I took out any identifying information to simplify things and hide the client's identity. That's why you see com.example.test.