qunit test executes multiple times

qunit test executes multiple times

This test is the eighth test in the suite and it gets executed 8 times.  Any idea why?
test("should retreive details data",function(){
        buildGrid();
        $.getJSON = function(data){
            ok(true,"requested details data");
            start();
           
        }
        $(tbl + " tbody tr:first").mouseup();
    });
thanks,
John