Rails test is throwing a deprecation warning over a gem (attr_encrypted) which is already updated to the latest version. It reads:
DEPRECATION WARNING: <custom_attribute_name> is not an attribute known
to Active Record. This behavior is deprecated and will be removed in
the next version of Rails. If you'd like <custom_attribute_name> to be
managed by Active Record, add attribute :<custom_attribute_name> to
your class.
Not sure what it is asking me to do... it must be declared using attr_encrypted.