How to measure the leakage currents of ADG709,ADG719,ADG794

Hi,  

When I measured the switch-off leakage current of the ADG709, I found that the value was incorrect. The test connection diagram is shown in the figure. Why is the leakage current of the test much larger than the standard maximum value of 20nA in the chip datasheet?

I wonder if there is something wrong with my test method or EN pin configuration?


 Appreciate your help.
  Thanks,