diff --git a/tests/clickhouse-test b/tests/clickhouse-test
index 79f6b5d71d3..bc30b3c21b7 100755
--- a/tests/clickhouse-test
+++ b/tests/clickhouse-test
@@ -711,7 +711,7 @@ def get_localzone():
 
 class SettingsRandomizer:
     settings = {
-        "max_insert_threads": lambda: 32
+        "max_insert_threads": lambda: 12
         if random.random() < 0.03
         else random.randint(1, 3),
         "group_by_two_level_threshold": threshold_generator(0.2, 0.2, 1, 1000000),
diff --git a/tests/queries/0_stateless/02834_apache_arrow_abort.sql b/tests/queries/0_stateless/02834_apache_arrow_abort.sql
index bd29e95db9a..47e1c5d3951 100644
--- a/tests/queries/0_stateless/02834_apache_arrow_abort.sql
+++ b/tests/queries/0_stateless/02834_apache_arrow_abort.sql
@@ -1,4 +1,4 @@
 -- Tags: no-fasttest
 -- This tests depends on internet access, but it does not matter, because it only has to check that there is no abort due to a bug in Apache Arrow library.
-
+SET optimize_trivial_insert_select=1;
 INSERT INTO TABLE FUNCTION url('https://clickhouse-public-datasets.s3.amazonaws.com/hits_compatible/athena_partitioned/hits_9.parquet') SELECT * FROM url('https://clickhouse-public-datasets.s3.amazonaws.com/hits_compatible/athena_partitioned/hits_9.parquet'); -- { serverError CANNOT_WRITE_TO_OSTREAM, RECEIVED_ERROR_FROM_REMOTE_IO_SERVER, POCO_EXCEPTION }