diff --git a/tests/queries/0_stateless/2024_merge_regexp_assert.sql b/tests/queries/0_stateless/2024_merge_regexp_assert.sql
index 8ea4a77bbd8..fed26b08ad9 100644
--- a/tests/queries/0_stateless/2024_merge_regexp_assert.sql
+++ b/tests/queries/0_stateless/2024_merge_regexp_assert.sql
@@ -1,3 +1,6 @@
+-- Tags: no-parallel
+-- (databases can be removed in background, so this test should not be run in parallel)
+
 DROP TABLE IF EXISTS t;
 CREATE TABLE t (b UInt8) ENGINE = Memory;
 SELECT a FROM merge(REGEXP('.'), '^t$'); -- { serverError 47 }