diff --git a/tests/integration/test_alter_codec/test.py b/tests/integration/test_alter_codec/test.py
index f51dc9a54ff..2117893af5b 100644
--- a/tests/integration/test_alter_codec/test.py
+++ b/tests/integration/test_alter_codec/test.py
@@ -7,9 +7,6 @@ cluster = ClickHouseCluster(__file__)
 node1 = cluster.add_instance('node1',
                              main_configs=['configs/logs_config.xml'])
 
-node2 = cluster.add_instance('node2',
-                             main_configs=['configs/logs_config.xml'])
-
 
 @pytest.fixture(scope="module")
 def started_cluster():
diff --git a/tests/integration/test_attach_without_fetching/test.py b/tests/integration/test_attach_without_fetching/test.py
index 954f19ea39e..c714d09cf58 100644
--- a/tests/integration/test_attach_without_fetching/test.py
+++ b/tests/integration/test_attach_without_fetching/test.py
@@ -1,5 +1,6 @@
 import time
 import pytest
+import logging
 
 from helpers.cluster import ClickHouseCluster
 from helpers.test_tools import assert_eq_with_retry
diff --git a/tests/integration/test_storage_kerberized_hdfs/secrets/krb.conf b/tests/integration/test_storage_kerberized_hdfs/secrets/krb.conf
index 2c1e6f15f77..90ad6b61c93 100644
--- a/tests/integration/test_storage_kerberized_hdfs/secrets/krb.conf
+++ b/tests/integration/test_storage_kerberized_hdfs/secrets/krb.conf
@@ -7,7 +7,7 @@
  default_realm = TEST.CLICKHOUSE.TECH
  dns_lookup_realm = false
  dns_lookup_kdc = false
- ticket_lifetime = 15s
+ ticket_lifetime = 5s
  forwardable = true
  default_tgs_enctypes = des3-hmac-sha1
  default_tkt_enctypes = des3-hmac-sha1
diff --git a/tests/integration/test_storage_kerberized_hdfs/test.py b/tests/integration/test_storage_kerberized_hdfs/test.py
index fa520752d1c..115c7005a84 100644
--- a/tests/integration/test_storage_kerberized_hdfs/test.py
+++ b/tests/integration/test_storage_kerberized_hdfs/test.py
@@ -53,7 +53,7 @@ def test_write_storage_not_expired(started_cluster):
 
     node1.query("create table SimpleHDFSStorageNotExpired (id UInt32, name String, weight Float64) ENGINE = HDFS('hdfs://kerberizedhdfs1:9010/simple_storage_not_expired', 'TSV')")
 
-    time.sleep(45)   # wait for ticket expiration
+    time.sleep(15)   # wait for ticket expiration
     node1.query("insert into SimpleHDFSStorageNotExpired values (1, 'Mark', 72.53)")
 
     api_read = hdfs_api.read_data("/simple_storage_not_expired")
@@ -83,7 +83,7 @@ def test_read_table_expired(started_cluster):
     hdfs_api.write_data("/simple_table_function_relogin", data)
 
     started_cluster.pause_container('hdfskerberos')
-    time.sleep(45)
+    time.sleep(15)
 
     try:
         select_read = node1.query("select * from hdfs('hdfs://reloginuser&kerberizedhdfs1:9010/simple_table_function', 'TSV', 'id UInt64, text String, number Float64')")