diff --git a/superset/sql_lab.py b/superset/sql_lab.py
index 527be41773a..259b464b128 100644
--- a/superset/sql_lab.py
+++ b/superset/sql_lab.py
@@ -495,7 +495,7 @@ def execute_sql_statements(  # noqa: C901
             # `False` here) would never fire. Mutate each statement here, before
             # joining them into the single block this engine requires, so
             # `MUTATE_AFTER_SPLIT=True` still applies the mutator per statement.
-            blocks = [
+            blocks: list[str] = [
                 ";\n".join(
                     database.mutate_sql_based_on_config(
                         statement.format(comments=db_engine_spec.allows_sql_comments),
diff --git a/tests/unit_tests/sql/execution/conftest.py b/tests/unit_tests/sql/execution/conftest.py
index f8aed71ae1a..22a0bbff22d 100644
--- a/tests/unit_tests/sql/execution/conftest.py
+++ b/tests/unit_tests/sql/execution/conftest.py
@@ -77,6 +77,11 @@ def mock_query() -> MagicMock:
     return query
 
 
+def _passthrough_mutate_sql_based_on_config(sql: str, **kwargs: Any) -> str:
+    """Mirror the real `Database.mutate_sql_based_on_config` no-op default."""
+    return sql
+
+
 @pytest.fixture
 def mock_database() -> MagicMock:
     """Create a mock Database."""
@@ -97,7 +102,9 @@ def mock_database() -> MagicMock:
     # Mirrors the real `Database.mutate_sql_based_on_config` default (no-op
     # when no `SQL_QUERY_MUTATOR` is configured), so SQL parsed from its
     # return value stays valid instead of an un-parseable `MagicMock`.
-    database.mutate_sql_based_on_config = MagicMock(side_effect=lambda sql, **kw: sql)
+    database.mutate_sql_based_on_config = MagicMock(
+        side_effect=_passthrough_mutate_sql_based_on_config
+    )
     return database
 
 
diff --git a/tests/unit_tests/sql/execution/test_executor.py b/tests/unit_tests/sql/execution/test_executor.py
index 12e234710be..910b843856d 100644
--- a/tests/unit_tests/sql/execution/test_executor.py
+++ b/tests/unit_tests/sql/execution/test_executor.py
@@ -47,7 +47,11 @@ from superset.models.core import Database
 
 # Note: database, database_with_dml, mock_db_session fixtures and
 # mock_query_execution helper are imported from conftest.py
-from .conftest import create_mock_cursor, mock_query_execution
+from .conftest import (
+    _passthrough_mutate_sql_based_on_config,
+    create_mock_cursor,
+    mock_query_execution,
+)
 
 # =============================================================================
 # Basic Execution Tests
@@ -889,14 +893,16 @@ def test_execute_sql_with_cursor_forwards_is_split(
     """
     from superset.sql.execution.executor import execute_sql_with_cursor
 
-    mutate_mock = mocker.patch.object(
-        database, "mutate_sql_based_on_config", side_effect=lambda sql, **kw: sql
+    mutate_mock: MagicMock = mocker.patch.object(
+        database,
+        "mutate_sql_based_on_config",
+        side_effect=_passthrough_mutate_sql_based_on_config,
     )
     mocker.patch.object(database.db_engine_spec, "execute")
     mocker.patch.object(database.db_engine_spec, "fetch_data", return_value=[(1,)])
     mocker.patch("superset.result_set.SupersetResultSet", return_value=MagicMock())
 
-    cursor = create_mock_cursor(["id"], data=[(1,)])
+    cursor: MagicMock = create_mock_cursor(["id"], data=[(1,)])
 
     execute_sql_with_cursor(
         database=database,