Python单元测试断言失败但通过了

Question

我正在编写python单元测试。 这样的CMake文件。

add_test(NAME test
  COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test_bridge.py 
  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/scripts
)

运行测试后，我希望看到这种情况下的失败。尽管已经有4个失败的案例，但结果也返回通过。为什么？

1: Ran 17 tests in 0.703s
1: 
1: FAILED (failures=4)
1: [av_bridge.py: 229] work threading end
1: [pv_bridge.py: 419] work threading end
1: [core.py: 454] signal_shutdown [atexit]
1/3 Test #1: python ...........................   Passed    4.49 sec