Genomic testing or skip the test

Good morning

I do have an inquiry. Been diagnosed had left side.mastectomy and found invasive ca and 1 lymph node with 4mm.  2 weeks after my surgery i opted for axillary clearance  and no other lymph nodes were involved. Saw the oncologist and she said i have the option of straight into hormone tabs or do the genomic onco test as clinical trials said theres not much difference with the results. I would like to ask if anyone  has skip the onco test score. And im not keen on chemo and scared of the side effects. 

Thanks