IllegalMonitorStateException not thrown where it should

While studying for OJP I came to the topic of Thread wait() method and so on, According to the book, this portion of code should throw IllegalMonitorStateException since the wait() is invoked on an object other than the one synchronized on, but I doesn't with me, Any Idea?

public class Syncho {

public  void synchoTest(){
    ThreadTest test1 = new ThreadTest();
    ThreadTest test2 = new ThreadTest();
    ThreadTest test3 = new ThreadTest();
    ThreadTest test4 = new ThreadTest();
    ThreadTest test5 = new ThreadTest();

    test1.start();
    test2.start();
    synchronized(test1){
        try{
            System.out.println("gere");
            //test1 = new ThreadTest();
            //test1.start();
            wait();
            System.out.println("tere");
        }catch(Exception x){}
    }
    //notify();
    test3.start();
    test4.start();
    test5.start();



}

}

actually "gere" only is printed not "tere"

I am using eclipse with java 7