diff --git a/tests/integration/test_peak_memory_usage/test.py b/tests/integration/test_peak_memory_usage/test.py
index f447c527d9b..8281b3dea73 100644
--- a/tests/integration/test_peak_memory_usage/test.py
+++ b/tests/integration/test_peak_memory_usage/test.py
@@ -91,7 +91,7 @@ def test_clickhouse_client_max_peak_memory_usage_distributed(started_cluster):
     with client(name="client1>", log=client_output, command=command_text) as client1:
         client1.expect(prompt)
         client1.send(
-            "SELECT COUNT(*) FROM distributed_fixed_numbers JOIN fixed_numbers_2 ON distributed_fixed_numbers.number=fixed_numbers_2.number SETTINGS query_plan_join_swap_table = 'false'",
+            "SELECT COUNT(*) FROM distributed_fixed_numbers JOIN fixed_numbers_2 ON distributed_fixed_numbers.number=fixed_numbers_2.number SETTINGS join_algorithm='hash', query_plan_join_swap_table = 'false'",
         )
         client1.expect("Peak memory usage", timeout=60)
         client1.expect(prompt)
diff --git a/tests/queries/0_stateless/00225_join_duplicate_columns.sql b/tests/queries/0_stateless/00225_join_duplicate_columns.sql
index 6cb4647cd14..712fae7a674 100644
--- a/tests/queries/0_stateless/00225_join_duplicate_columns.sql
+++ b/tests/queries/0_stateless/00225_join_duplicate_columns.sql
@@ -1,3 +1,12 @@
+-- The following queries use very weird block structure:
+-- __table3.b UInt8 UInt8(size = 1), __table3.b UInt8 Const(size = 1, UInt8(size = 1)), __table3.c UInt8 Const(size = 1, UInt8(size = 1))
+-- That leads to a pretty legit error in ConcurrentHashJoin within a call to Block::cloneEmpty():
+-- Code: 352. DB::Exception: Block structure mismatch in (columns with identical name must have identical structure) stream: different columns:
+-- __table3.b UInt8 UInt8(size = 0)
+-- __table3.b UInt8 Const(size = 0, UInt8(size = 1))
+-- So let's disable parallel_hash.
+SET join_algorithm = 'hash,grace_hash,partial_merge,full_sorting_merge';
+
 select b from (select 1 as a, 42 as c) js1 any left join (select 2 as b, 2 as b, 41 as c) js2 using c;
 select b from (select 1 as a, 42 as c) js1 any left join (select 2 as b, 2 as b, 42 as c) js2 using c;