diff --git a/ydb/tests/olap/scenario/helpers/scenario_tests_helper.py b/ydb/tests/olap/scenario/helpers/scenario_tests_helper.py
index b0b439ec31d6..ffb006620be9 100644
--- a/ydb/tests/olap/scenario/helpers/scenario_tests_helper.py
+++ b/ydb/tests/olap/scenario/helpers/scenario_tests_helper.py
@@ -92,7 +92,7 @@ def __init__(self, name: str, compression: ScenarioTestHelper.Compression, compr
 
         def to_yql(self) -> str:
             """Convert to YQL"""
-            return f'FAMILY {self._name} (COMPRESSION = "{self._compression.name}"{", COMPRESSION_LEVEL = " + str(self._compression_level) if self._compression_level != None else ""})'
+            return f'FAMILY {self._name} (COMPRESSION = "{self._compression.name}"{", COMPRESSION_LEVEL = " + str(self._compression_level) if self._compression_level is not None else ""})'
 
         @property
         def name(self) -> str:
diff --git a/ydb/tests/olap/scenario/test_alter_compression.py b/ydb/tests/olap/scenario/test_alter_compression.py
index 66c530bc2f68..1ac35a53eb88 100644
--- a/ydb/tests/olap/scenario/test_alter_compression.py
+++ b/ydb/tests/olap/scenario/test_alter_compression.py
@@ -17,8 +17,8 @@
 )
 
 from typing import List, Dict, Any
-from ydb import PrimitiveType, StatusCode
-from ydb.tests.olap.lib.utils import get_external_param, external_param_is_true
+from ydb import PrimitiveType
+from ydb.tests.olap.lib.utils import get_external_param
 from datetime import datetime, timedelta
 from string import ascii_lowercase