.net - Cannot Set Authorization Rules In Web.config For WCF Service

I read on a post that you can use ASP.Net authorization in the web config to control access to a WCF web service to replace the following attribute:

[PrincipalPermission(SecurityAction.Demand, Role="Administrators")]

To test I have been using "Administrators" which is a valid role so should allow me access and "TEST" which isnt. This works fine when using the above attribute however when I comment that out and use this in my Web.Config file:

<authentication mode="Windows" />
<authorization>
<allow roles=".TEST"/>
<deny roles="*"/>
</authorization>

It still allows me access.

So I was wondering if I have just got something wrong in the web.config or whether what I read was wrong saying to use that.

Just for reference this is the post I looked at:

Using Windows Role authentication in the App.config with WCF

and the following is my web.config:

<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
<authentication mode="Windows" />
<authorization>
<allow roles=".TEST"/>
<deny users="*"/>
</authorization>
</system.web>
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="BasicHttpEndpointBinding">
<security mode="TransportCredentialOnly">
<transport clientCredentialType="Windows" />
</security>
</binding>
</basicHttpBinding>
</bindings>
<services>
<service behaviorConfiguration="WcfService1.ServiceBehaviour1" name="WcfService1.Service1">
<endpoint address="" binding="basicHttpBinding" bindingConfiguration="BasicHttpEndpointBinding"
name="BasicHttpEndpoint" contract="WcfService1.IService1">
<identity>
<dns value="localhost"/>
</identity>
</endpoint>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="WcfService1.ServiceBehaviour1">
<!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="true"/>
<!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="false"/>
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
</configuration>