diff --git a/test/t/018_hnsw_filtering.pl b/test/t/018_hnsw_filtering.pl
index fd61ff4..074aba5 100644
--- a/test/t/018_hnsw_filtering.pl
+++ b/test/t/018_hnsw_filtering.pl
@@ -40,7 +40,7 @@ my $explain = $node->safe_psql("postgres", qq(
 like($explain, qr/Index Scan using idx/);
 
 # Test attribute filtering with few rows removed
-my $explain = $node->safe_psql("postgres", qq(
+$explain = $node->safe_psql("postgres", qq(
 	EXPLAIN ANALYZE SELECT i FROM tst WHERE c != $c ORDER BY v <-> '$query' LIMIT $limit;
 ));
 like($explain, qr/Index Scan using idx/);