Thanks sooo much! After adding the == method, everything worked well!

I am stuck in this challenge. Would be really grateful if someone can direct me. Having these errors
Expected: #<Vector:0x000056332da9c0c0 @coordinates=[1, 2, 3]>, instead got: #<Vector:0x000056332da9c1b0 @coordinates=[1, 2, 3]> from the creation test and
Expected: #<Vector:0x000056332da92a98 @coordinates=[0, 0, 0]>, instead got: #<Vector:0x000056332da92b60 @coordinates=[0, 0, 0]>
Expected: #<Vector:0x000056332da92598 @coordinates=[2, 4, 6]>, instead got: #<Vector:0x000056332da92688 @coordinates=[2, 4, 6]>
from the addition & subtraction tests
I know the objects id's does not match but I am creating a new object on both methods