diff --git a/exasol_advanced_analytics_framework/udf_framework/query_handler_runner_udf.py b/exasol_advanced_analytics_framework/udf_framework/query_handler_runner_udf.py
index 3a93b45..8f036ae 100644
--- a/exasol_advanced_analytics_framework/udf_framework/query_handler_runner_udf.py
+++ b/exasol_advanced_analytics_framework/udf_framework/query_handler_runner_udf.py
@@ -43,9 +43,7 @@ def upload_via_joblib(location: bfs.path.PathLike, object: Any):
         joblib.dump(object, temp_file.name)
         temp_file.flush()
         temp_file.seek(0)
-        data = b''.join(temp_file)
-        # strangely location.write(temp_file) did not write any data to BFS
-        location.write(data)
+        location.write(temp_file.read())
 
 
 def read_via_joblib(location: bfs.path.PathLike) -> Any:
diff --git a/tests/integration_tests/with_db/fixtures/setup_database_fixture.py b/tests/integration_tests/with_db/fixtures/setup_database_fixture.py
index 1495dda..bf2902c 100644
--- a/tests/integration_tests/with_db/fixtures/setup_database_fixture.py
+++ b/tests/integration_tests/with_db/fixtures/setup_database_fixture.py
@@ -29,7 +29,6 @@ def deployed_scripts(pyexasol_connection, db_schema_name, language_alias) -> Non
 
 @pytest.fixture(scope="module")
 def database_with_slc(
-        # pyexasol_connection,
         deployed_scripts,
         db_schema_name,
         bucketfs_connection_factory,
diff --git a/tests/unit_tests/udf_framework/test_query_handler_runner_udf_mock.py b/tests/unit_tests/udf_framework/test_query_handler_runner_udf_mock.py
index cef0b46..a3f10d9 100644
--- a/tests/unit_tests/udf_framework/test_query_handler_runner_udf_mock.py
+++ b/tests/unit_tests/udf_framework/test_query_handler_runner_udf_mock.py
@@ -211,10 +211,6 @@ def state_file_exists(iteration: int) -> bool:
     current = 1
     assert not state_file_exists(previous) and state_file_exists(current)
 
-    # prev_state_exists = _state_file_exists(0, query_handler_bfs_connection)
-    # current_state_exists = _state_file_exists(1, query_handler_bfs_connection)
-    # assert prev_state_exists == False and current_state_exists == True
-
     exa = MockExaEnvironment(
         metadata=MockMetaData(
             script_code_wrapper_function=_udf_wrapper,