How do you configure WCF to support FaultContracts where both the host and client are in the same process using a net.pipe?

System.ServiceModel.CommunicationException: There was an error reading from the pipe: The pipe has been ended. (109, 0x6d).

public class ValidationException : ApplicationException { }

<system.serviceModel>

  <client>
    <endpoint name="Client"
              contract="IService"
              address="net.pipe://localhost/ServiceTest/"
              binding="netNamedPipeBinding"
              bindingConfiguration="netPipeBindingConfig" />
  </client>

  <services>
    <service
      name="Service"
      behaviorConfiguration="ServiceFaults">
      <host>
        <baseAddresses>
          <add baseAddress="net.pipe://localhost/ServiceTest/"/>
          <add baseAddress="http://localhost/ServiceTest/"/>
        </baseAddresses>
      </host>
      <endpoint
        address=""
        binding="netNamedPipeBinding"
        bindingConfiguration="netPipeBindingConfig"

        name="ServicePipe"
        contract="IService" />
      <endpoint
        address="MEX"
        binding="mexNamedPipeBinding"
        bindingConfiguration="mexNetPipeBindingConfig"
        name="MexUserServicePipe"
        contract="IMetadataExchange" />
    </service>
  </services>

  <bindings>
    <netNamedPipeBinding>
      <binding name="netPipeBindingConfig"
               closeTimeout="00:30:00"
               sendTimeout="00:30:00" />
    </netNamedPipeBinding>
    <mexNamedPipeBinding>
      <binding name="mexNetPipeBindingConfig"></binding>
    </mexNamedPipeBinding>
  </bindings>

  <behaviors>
    <serviceBehaviors>
      <behavior name="ServiceFaults">
        <serviceDebug includeExceptionDetailInFaults="true"/>
      </behavior>
      <behavior name="MEX">
        <serviceMetadata
          httpGetEnabled="true"
          httpGetUrl="http://localhost/ServiceTest/MEX"/>
      </behavior>
    </serviceBehaviors>
  </behaviors>

</system.serviceModel>