datadir="default_with_oids_test"

rm -rf $datadir && initdb -D $datadir
pg_ctl -D $datadir start -w

psql -d postgres -c "CREATE TABLE test (x integer) WITH OIDS"
psql -d postgres -c "INSERT INTO test (x) VALUES (0)"
psql -d postgres -c "SELECT oid, x FROM test"
#   oid  | x 
# -------+---
#  16387 | 0
# (1 row)

pg_dump -d postgres > default_with_oids_test.sql
pg_ctl -D $datadir stop

rm -rf $datadir && initdb -D $datadir
pg_ctl -D $datadir start -w

psql -d postgres -f default_with_oids_test.sql
psql -d postgres -c "SELECT oid, x FROM test"
# ERROR:  column "oid" does not exist
# LINE 1: SELECT oid, x FROM test

pg_ctl -D $datadir stop -w