Glancing blows vs the opressor

I am wondering what happens if you have the shield and the passive, does it add both or is the shield cancelled out by the passive

All sources of "you take X% damage from blocked hits" will add.

Yes, you heard this right. If you take Glancing Blow, The Oppressor and one of those Ritual boots that gives you +x% block chance but makes you take 20% of damage from blocked hits, you will end up taking 105% damage from a blocked hit.

What a time to be alive.

lol thanks