--- a/src/bin/pg_dump/t/002_pg_dump.pl
+++ b/src/bin/pg_dump/t/002_pg_dump.pl
@@ -152,10 +152,13 @@ my %pgdump_runs = (
        },
        defaults_custom_format_no_seek_parallel_restore => {
                test_key => 'defaults',
-               dump_cmd => [
-                       'pg_dump', '-Fc', '-Z6', '--no-sync', '--disable-seeking',
+               dump_cmd => (
+                       [
+                       'pg_dump', '-Fc', '-Z6', '--no-sync',
                        "--file=$tempdir/defaults_custom_format_no_seek_parallel_restore.dump", 'postgres',
-               ],
+                       ],
+                       "|", [ "cat" ], # disable seeking
+               ),