Because they're stubbing Time.now :  https://github.com/ifeelgoods/aspec/blob/cda1c915b701f3017b70331fd3912cd30bc4b22f/lib/aspec/test.rb#L51

Our token check is based on server time using Time.now (returning 1970-01-01 ... date with this stub)

I've generated the token with a rails server without Time stubbing so token expiration date is based on our current date (ie ~43 years to expire)