Although the appconfig file doesn't have all configuration, the wcftestclient works fine

Hi

I have a little question

I consume a wcf service and  the client needs this configuration:

 <binding name="wsHttpBindingConfiguration" maxBufferPoolSize="2147483647"          maxReceivedMessageSize="2147483647" messageEncoding="Text" textEncoding="utf-8">          <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647"            maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />          <security mode="None" />        </binding>

All clients need this configuration since the default values are limited. For instance, Wcfstorm and soapUI.

Now I want to use wcftestclient. I can see that the appconfig of wcftestclient doesn't have this configuration  

The question is: How can wcftestclient work without all configuration in its appconfig?