Question About Colcon Test

Environment : OS: Ubuntu 22.04.5 LTS x86_64
ROS Version : ros2/humble
Python version : Python 3.10.12
Flake8 version : 4.0.1

Problem : Successfully run the colcon build or colcon build --symlink-install, but have problem in running colcon test

=============================== warnings summary ===============================
test/test_flake8.py::test_flake8
test/test_flake8.py::test_flake8
  Warning: SelectableGroups dict interface is deprecated. Use select.

-- Docs: https://docs.pytest.org/en/stable/warnings.html
---
Finished <<< launch_testing_examples [18.0s]

Summary: 22 packages finished [18.2s]
  10 packages had stderr output: examples_rclpy_executors examples_rclpy_guard_conditions examples_rclpy_minimal_action_client examples_rclpy_minimal_action_server examples_rclpy_minimal_client examples_rclpy_minimal_publisher examples_rclpy_minimal_service examples_rclpy_minimal_subscriber examples_rclpy_pointcloud_publisher launch_testing_examples

What can I do to solve this problem? Thank you.

Start by reproducing the reported colcon test command in the ROS 2 Humble environment and inspect test/test_flake8.py, the only test file named. Determine whether the displayed warning corresponds to a failed test; done means identifying a concrete failure and documenting the expected successful test result.