how ridicule initialcontext category jmockit?

i'm controlling jmockit tests category i wish test, uses initialcontext directly. i have following:

public category myclass {
  open vacant mymethod() {
    initialcontext ic = new initialcontext();
    javax.mail.session mailsession = ic.lookup("my.mail.session");

    // rest slight follows.....
  }

in exam case, i "mocked" initialcontext class:

mockit.redefinemethods(initialcontext.class, mockinitialcontext.class);

what best proceed ridicule initialcontext category jmockit.

i've already attempted few ways (such controlling possess mockinitialcontextfactory), nonetheless retaining stumbling same error:

noclassdeffounderror: my.class.mockinitialcontext

from i google, scathing jndi definitely nasty. greatfully anyone yield me guidance, indicate me solution? many appreciated. conclude you.