Thanks Puneeth for the initial tests and Elena for expanding the fix and the tests to cover assertDictEqual too.
I reworked a bit Elena's patch to make the checks in case.py more consistent and simplified the tests.

With the attached patch, unittest_scse.py works fine, producing this output:
FF
======================================================================
FAIL: test_compare (__main__.SCSE)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "unittest_scse.py", line 14, in test_compare
    self.assertEqual(arr1, arr2)
AssertionError: Lists differ: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,[29953 chars]1, 1] != [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,[29953 chars]2, 2]

First differing element 0:
1
2


======================================================================
FAIL: test_compare_2 (__main__.SCSE)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "unittest_scse.py", line 24, in test_compare_2
    self.assertEqual(arr1, arr2)
AssertionError: Lists differ: [1, 1[29932 chars] 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] != [1, 1[29932 chars] 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2]

First differing element 9999:
1
2


----------------------------------------------------------------------
Ran 2 tests in 0.010s

FAILED (failures=2)