better-exceptions: How to use better-exceptions with unittest?

I want to use better-exceptions to show error when using unittest. Here is my example:

test.py:

import better_exceptions
import unittest

better_exceptions.hook()


class MyTestCase(unittest.TestCase):
    def add(self, a, b):
        better_exceptions.hook()

        return a + b

    def test_add(self,):
        better_exceptions.hook()

        r1 = self.add(1, 2)
        r2 = self.add(2, "1")
        self.assertTrue(r1, r2)


if __name__ == "__main__":
    unittest.main()

shell:

$ export BETTER_EXCEPTIONS=1
$ echo $BETTER_EXCEPTIONS
1
$ python3 test.py
E
======================================================================
ERROR: test_add (__main__.MyTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "test.py", line 17, in test_add
    r2 = self.add(2, "1")
  File "test.py", line 11, in add
    return a + b
TypeError: unsupported operand type(s) for +: 'int' and 'str'

----------------------------------------------------------------------
Ran 1 test in 0.004s

FAILED (errors=1)

Is there any way to use better-exceptions to print exception stack?

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