pytest在调试模式下运行时会通过，但否则会失败

Question

以下是我执行的pytest代码来测试添加连接命令。

 def test_cli_connection_add(self, cmd, expected_output, expected_conn):
        runner = CliRunner()
        result = runner.invoke(connections, cmd)
        assert result.output.strip() == expected_output

它的问题可能会说出预期的输出应该具有新线。

>       assert result.output.strip() == expected_output
E       AssertionError: assert ('Successfully added `conn_id`=new4 : '\n 'hive_metastore://airflow:******@host:9083/airflow') == ('Successfully added `conn_id`=new4 :   \n'\n 'hive_metastore://airflow:******@host:9083/airflow')
E         + Successfully added `conn_id`=new4 : hive_metastore://airflow:******@host:9083/airflow
E         - Successfully added `conn_id`=new4 :
E         - hive_metastore://airflow:******@host:9083/airflow

tests/cli/commands/test_connection.py:558: AssertionError

为了进一步调试此问题，我在代码中添加了set_trace：

 def test_cli_connection_add(self, cmd, expected_output, expected_conn):
        pytest.set_trace()
        runner = CliRunner()
        result = runner.invoke(connections, cmd)
        assert result.output.strip() == expected_output

当我通过debugger执行代码时，主张通过。谁能帮我为什么这样做？