+# L<perldata/"Version Strings">
+my $v = eval 'v'.$over->{dbh}->{sqlite_version};
+SKIP: {
+ skip("no WAL in SQLite version $v < 3.7.0", 1) if $v lt v3.7.0;
+ $over->{dbh}->do('PRAGMA journal_mode = WAL');
+ $over = PublicInbox::OverIdx->new("$tmpdir/over.sqlite3");
+ is($over->dbh->selectrow_array('PRAGMA journal_mode'), 'wal',
+ 'WAL journal_mode not clobbered if manually set');
+}
+