sage -t --long --warn-long 51.7 src/sage/interfaces/psage.py
**********************************************************************
File "src/sage/interfaces/psage.py", line 75, in sage.interfaces.psage.PSage._repr_
Failed example:
    PSage()                                   # indirect doctest
Expected:
    A running non-blocking (parallel) instance of Sage (number ...)
Got:
    deleting
    kill -9 20711
    deleting
    kill -9 20754
    deleting
    kill -9 20767
    Exception ignored in: <function PSage.__del__ at 0x7fbcc4c1bd90>
    Traceback (most recent call last):
      File "/home/eric/sage/py3/local/lib/python3.7/site-packages/sage/interfaces/psage.py", line 117, in __del__
        Sage.__del__(self)
    AttributeError: type object 'Sage' has no attribute '__del__'
    Exception ignored in: <function PSage.__del__ at 0x7fbcc4c1bd90>
    Traceback (most recent call last):
      File "/home/eric/sage/py3/local/lib/python3.7/site-packages/sage/interfaces/psage.py", line 117, in __del__
        Sage.__del__(self)
    AttributeError: type object 'Sage' has no attribute '__del__'
    Exception ignored in: <function PSage.__del__ at 0x7fbcc4c1bd90>
    Traceback (most recent call last):
      File "/home/eric/sage/py3/local/lib/python3.7/site-packages/sage/interfaces/psage.py", line 117, in __del__
        Sage.__del__(self)
    AttributeError: type object 'Sage' has no attribute '__del__'
    A running non-blocking (parallel) instance of Sage (number 3)
**********************************************************************
1 item had failures:
   1 of   3 in sage.interfaces.psage.PSage._repr_
    [6 tests, 1 failure, 4.80 s]