blind test

US /blaɪnd test/
UK /blaɪnd test/
"blind test" picture
1.

teste cego

a test in which the identity of the tested items is concealed from the participants to prevent bias

:
We conducted a blind test to compare the taste of different coffee brands.
Realizamos um teste cego para comparar o sabor de diferentes marcas de café.
The new software underwent a rigorous blind test before its release.
O novo software passou por um rigoroso teste cego antes de seu lançamento.