Question: I'm trying to run a test that was previously working but has suddenly stopped running but now i seem to get an error on all my tests e.g. from httmock import HTTMock from unittest import TestCase from unittest.mock import patch, call, mock_open, MagicMock, Mock, ANY import os.path import os from src.operators import InjestDictDescriptionOperator from airflow.hooks.base_hook import BaseHook from airflow.hooks.postgres_hook import PostgresHook from airflow.hooks.S3_hook import S3Hook class TestInjestDictDescriptionOperator(TestCase): def setUp(self): # hook patches self.open_file_mock = patch('builtins.open').start() self.os_path_isdir = patch.object(os.path, 'isdir').start() self.os_makedirs = patch.object(os, 'makedirs').start() self.open_file_write_mock = self.open_file_mock.return_value.__enter__.return_value.write # prepare the target self.target = InjestDictDescriptionOperator( task_id='InjestDictDescriptionOperatorTest', sql=None, postgres_conn_id='test', aws_conn_id='s3-conn-1', s3_bucket_name=‘data’, output_path='output/path/1') def tearDown(self): patch.stopall() def testTmpFolderCreationIfItDoesntExist(self): self.os_path_isdir.return_value = False self.target.execute(None) self.os_makedirs.assert_called_with('/tmp/') def testTmpFolderNotCreatedIfItExists(self): self.os_path_isdir.return_value = True self.target.execute(None) self.os_makedirs.assert_not_called() def testTmpFileCreation(self): self.target.execute(None) self.open_file_mock.assert_called_with( '/tmp/modelling/temp.txt', 'w+', encoding='utf-8') def testTmpFileDataDump(self): self.target.execute(None) self.open_file_write_mock.assert_has_calls( [ call(f"{doc['name']}\n") for doc in self.dummy_data ] , any_order=False)  The traceback details of the problem are ests/operators/modelling/language/test_injest_dict_description_operator.py:9: in <module> from src.operators.modelling.language import InjestDictDescriptionOperator src/operators/modelling/language/__init__.py:1: in <module> from .injest_onboarded_commands_operator import Operator as InjestOnboardedCommandsOperator src/operators/modelling/language/injest_onboarded_commands_operator.py:9: in <module> from airflow.models import BaseOperator ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/__init__.py:50: in <module> from airflow.models import DAG # noqa: E402 ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/models/__init__.py:21: in <module> from airflow.models.baseoperator import BaseOperator, BaseOperatorLink # noqa: F401 ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/models/baseoperator.py:43: in <module> from airflow.models.dag import DAG ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/models/dag.py:52: in <module> from airflow.models.dagbag import DagBag ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/models/dagbag.py:50: in <module> class DagBag(BaseDagBag, LoggingMixin): ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/models/dagbag.py:80: in DagBag DAGBAG_IMPORT_TIMEOUT = conf.getint('core', 'DAGBAG_IMPORT_TIMEOUT') ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/configuration.py:414: in getint return int(self.get(section, key, **kwargs)) E ValueError: invalid literal for int() with base 10: '30.0'collection failure tests/operators/modelling/language/test_injest_dict_description_operator.py:9: in <module> from src.operators.modelling.language import InjestDictDescriptionOperator src/operators/modelling/language/__init__.py:1: in <module> from .injest_onboarded_commands_operator import Operator as InjestOnboardedCommandsOperator src/operators/modelling/language/injest_onboarded_commands_operator.py:9: in <module> from airflow.models import BaseOperator ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/__init__.py:50: in <module> from airflow.models import DAG # noqa: E402 ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/models/__init__.py:21: in <module> from airflow.models.baseoperator import BaseOperator, BaseOperatorLink # noqa: F401 ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/models/baseoperator.py:43: in <module> from airflow.models.dag import DAG ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/models/dag.py:52: in <module> from airflow.models.dagbag import DagBag ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/models/dagbag.py:50: in <module> class DagBag(BaseDagBag, LoggingMixin): ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/models/dagbag.py:80: in DagBag DAGBAG_IMPORT_TIMEOUT = conf.getint('core', 'DAGBAG_IMPORT_TIMEOUT') ../../../../.pyenv/versions/3.6.10/lib/python3.6/site-packages/airflow/configuration.py:414: in getint return int(self.get(section, key, **kwargs)) E ValueError: invalid literal for int() with base 10: '30.0'  The only thing that changed was apache-airflow. I upgraded to the latest version 2.0 but then realised i would need to refactor parts of my code so downgraded to a later version.

Answer: The DAGBAG_IMPORT_TIMEOUT had been upgraded in the config files to float for 2.0 and for 1.10.14 it needed to be float. Deleted airflow completely including cfg files and re-installed the version