pg_restore casts check constraints differently

This might not be a common case, but we're using pg_dump in a testing
environment to check migrations - 1) we initialize the db from HEAD,
pg_dump it, 2) we initialize the db from migration_base.sql, apply
migrations, pg_dump it, and 3) compare the two dumps to verify that our
migrations are correct wrt schema.

However, we're seeing pg_restore transforming our check constraints with
different casting.

# \d arrayed_library
CONSTRAINT arrayed_library_step_check CHECK (((step)::text = ANY
((ARRAY['ADD_RESERVED_SEQUENCES'::character varying,
'ANALYZE_DESIGN_WARNINGS'::character varying, 'COMPLETE_ORDER'::character
varying, 'DEFINE_VARIANTS'::character varying,
'LABEL_TRANSLATION'::character varying])::text[])))

$ dropdb db && createdb db
$ pg_dump db --schema-only --no-owner > migration_base.sql
# migration_base.sql has the same CONSTRAINT as above
$ psql db -q -f migration_base.sql

# \d arrayed_library
CONSTRAINT arrayed_library_step_check CHECK (((step)::text = ANY
(ARRAY[('ADD_RESERVED_SEQUENCES'::character varying)::text,
('ANALYZE_DESIGN_WARNINGS'::character varying)::text,
('COMPLETE_ORDER'::character varying)::text, ('DEFINE_VARIANTS'::character
varying)::text, ('LABEL_TRANSLATION'::character varying)::text])))

Note that the restored constraint has ARRAY('a'::text, 'b'::text, ...)
while the original had (ARRAY['a', 'b', ...])::text[]

Is there any way to have postgres NOT do the extra conversions?

--
- Josh