diff --git a/tests/integration/test_mysql_protocol/test.py b/tests/integration/test_mysql_protocol/test.py
index 2cfb1d41ce0..96e7a087d5a 100644
--- a/tests/integration/test_mysql_protocol/test.py
+++ b/tests/integration/test_mysql_protocol/test.py
@@ -1,6 +1,7 @@
 # coding: utf-8
 
 import datetime
+import fnmatch
 import math
 import os
 import time
@@ -149,7 +150,7 @@ def java_container():
 
 
 def test_mysql_client(started_cluster):
-    # type: (Container, str) -> None
+    # type: (ClickHouseCluster) -> None
     code, (stdout, stderr) = started_cluster.mysql_client_container.exec_run(
         """
         mysql --protocol tcp -h {host} -P {port} default -u user_with_double_sha1 --password=abacaba
@@ -365,7 +366,10 @@ def test_mysql_replacement_query(started_cluster):
         demux=True,
     )
     assert code == 0
-    assert stdout.decode() == "currentDatabase()\ndefault\n"
+    assert stdout.decode().lower() in [
+        "currentdatabase()\ndefault\n",
+        "database()\ndefault\n",
+    ]
 
     code, (stdout, stderr) = started_cluster.mysql_client_container.exec_run(
         """
@@ -377,7 +381,10 @@ def test_mysql_replacement_query(started_cluster):
         demux=True,
     )
     assert code == 0
-    assert stdout.decode() == "currentDatabase()\ndefault\n"
+    assert stdout.decode().lower() in [
+        "currentdatabase()\ndefault\n",
+        "database()\ndefault\n",
+    ]
 
 
 def test_mysql_select_user(started_cluster):
@@ -391,7 +398,7 @@ def test_mysql_select_user(started_cluster):
         demux=True,
     )
     assert code == 0
-    assert stdout.decode() == "currentUser()\ndefault\n"
+    assert stdout.decode() in ["currentUser()\ndefault\n", "user()\ndefault\n"]
 
 
 def test_mysql_explain(started_cluster):
@@ -568,9 +575,8 @@ def test_python_client(started_cluster):
     with pytest.raises(pymysql.InternalError) as exc_info:
         client.query("select name from tables")
 
-    assert exc_info.value.args[1].startswith(
-        "Code: 60. DB::Exception: Table default.tables doesn't exist"
-    ), exc_info.value.args[1]
+    resp = exc_info.value.args[1]
+    assert fnmatch.fnmatch(resp, "*DB::Exception:*system.part_log*UNKNOWN_TABLE*"), resp
 
     cursor = client.cursor(pymysql.cursors.DictCursor)
     cursor.execute("select 1 as a, 'тест' as b")
@@ -602,9 +608,8 @@ def test_python_client(started_cluster):
     with pytest.raises(pymysql.InternalError) as exc_info:
         client.query("select name from tables")
 
-    assert exc_info.value.args[1].startswith(
-        "Code: 60. DB::Exception: Table default.tables doesn't exist"
-    ), exc_info.value.args[1]
+    resp = exc_info.value.args[1]
+    assert fnmatch.fnmatch(resp, "*DB::Exception:*system.part_log*UNKNOWN_TABLE*"), resp
 
     cursor = client.cursor(pymysql.cursors.DictCursor)
     cursor.execute("select 1 as a, 'тест' as b")
diff --git a/tests/integration/test_part_log_table/test.py b/tests/integration/test_part_log_table/test.py
index d81990a9d47..ea4499d5877 100644
--- a/tests/integration/test_part_log_table/test.py
+++ b/tests/integration/test_part_log_table/test.py
@@ -1,4 +1,5 @@
 import pytest
+import fnmatch
 
 from helpers.cluster import ClickHouseCluster
 
@@ -27,20 +28,20 @@ def start_cluster():
 
 
 def test_config_without_part_log(start_cluster):
-    assert "Table system.part_log doesn't exist" in node1.query_and_get_error(
-        "SELECT * FROM system.part_log"
-    )
+    resp = node1.query_and_get_error("SELECT * FROM system.part_log")
+    assert fnmatch.fnmatch(resp, "*DB::Exception:*system.part_log*UNKNOWN_TABLE*"), resp
+
     node1.query(
         "CREATE TABLE test_table(word String, value UInt64) ENGINE=MergeTree() ORDER BY value"
     )
-    assert "Table system.part_log doesn't exist" in node1.query_and_get_error(
-        "SELECT * FROM system.part_log"
-    )
+    resp = node1.query_and_get_error("SELECT * FROM system.part_log")
+    assert fnmatch.fnmatch(resp, "*DB::Exception:*system.part_log*UNKNOWN_TABLE*"), resp
+
     node1.query("INSERT INTO test_table VALUES ('name', 1)")
     node1.query("SYSTEM FLUSH LOGS")
-    assert "Table system.part_log doesn't exist" in node1.query_and_get_error(
-        "SELECT * FROM system.part_log"
-    )
+
+    resp = node1.query_and_get_error("SELECT * FROM system.part_log")
+    assert fnmatch.fnmatch(resp, "*DB::Exception:*system.part_log*UNKNOWN_TABLE*"), resp
 
 
 # Note: if part_log is defined, we cannot say when the table will be created - because of metric_log, trace_log, text_log, query_log...
diff --git a/tests/integration/test_postgresql_replica_database_engine_2/test.py b/tests/integration/test_postgresql_replica_database_engine_2/test.py
index 33796336550..1ba278b357e 100644
--- a/tests/integration/test_postgresql_replica_database_engine_2/test.py
+++ b/tests/integration/test_postgresql_replica_database_engine_2/test.py
@@ -203,7 +203,7 @@ def test_remove_table_from_replication(started_cluster):
     table_name = "postgresql_replica_4"
     instance.query(f"DETACH TABLE test_database.{table_name} PERMANENTLY")
     result = instance.query_and_get_error(f"SELECT * FROM test_database.{table_name}")
-    assert "doesn't exist" in result
+    assert "UNKNOWN_TABLE" in result
 
     result = instance.query("SHOW TABLES FROM test_database")
     assert (