JUnit Test : Forcing exception from internal method call

So I am trying to write a test case which covers a piece of code written inside catch block. This is how it goes:

I have two methods in class A.

class A{

     public SomeReturnType m1()
     {
       try{
            m2();
         }catch(SomeException ex)
         {
          //handler code for SomeException (This is what I want to test). 
         }
     }

     public SomeReturnType m2() throws SomeException
     {
            //Some logic
     }
}

I am wondering How can a force this exception when m2() is called from the unit test case of method m1()? Any solutions using Mockito or any other testing lib?