diff --git a/test/t/043_hnsw_iterative_scan.pl b/test/t/043_hnsw_iterative_scan.pl
index 3e22a8a..fe0f671 100644
--- a/test/t/043_hnsw_iterative_scan.pl
+++ b/test/t/043_hnsw_iterative_scan.pl
@@ -28,6 +28,7 @@ my $count = $node->safe_psql("postgres", qq(
 	SET enable_seqscan = off;
 	SET hnsw.iterative_scan = relaxed_order;
 	SET hnsw.max_scan_tuples = 100000;
+	SET hnsw.scan_mem_multiplier = 2;
 	SELECT COUNT(*) FROM (SELECT v FROM tst WHERE i % 10000 = 0 ORDER BY v <-> (SELECT v FROM tst LIMIT 1) LIMIT 11) t;
 ));
 is($count, 10);
@@ -44,6 +45,7 @@ foreach ((30000, 50000, 70000))
 			SET enable_seqscan = off;
 			SET hnsw.iterative_scan = relaxed_order;
 			SET hnsw.max_scan_tuples = $max_tuples;
+			SET hnsw.scan_mem_multiplier = 2;
 			SELECT COUNT(*) FROM (SELECT v FROM tst WHERE i % 10000 = 0 ORDER BY v <-> (SELECT v FROM tst WHERE i = $i) LIMIT 11) t;
 		));
 		$sum += $count;
@@ -59,7 +61,6 @@ my ($ret, $stdout, $stderr) = $node->psql("postgres", qq(
 	SET hnsw.iterative_scan = relaxed_order;
 	SET client_min_messages = debug1;
 	SET work_mem = '1MB';
-	SET hnsw.scan_mem_multiplier = 1;
 	SELECT COUNT(*) FROM (SELECT v FROM tst WHERE i % 10000 = 0 ORDER BY v <-> (SELECT v FROM tst LIMIT 1) LIMIT 11) t;
 ));
 like($stderr, qr/hnsw index scan reached memory limit after \d+ tuples/);