When verbosity level is more than 1 the test tries to print the script_exec_args passed to script. It fails when the tuple has more than 1 elements and is used in formatting with %r. The two tests fail as below : 

./python -m test test_cmd_line_script -vv

======================================================================
ERROR: test_package_error (test.test_cmd_line_script.CmdLineTest)
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Traceback (most recent call last):
  File "/root/cpython/Lib/test/test_cmd_line_script.py", line 368, in test_package_error
    self._check_import_error(["-m", "test_pkg"], msg, cwd=script_dir)
  File "/root/cpython/Lib/test/test_cmd_line_script.py", line 148, in _check_import_error
    print('Output from test script %r:' % script_exec_args)
TypeError: not all arguments converted during string formatting

======================================================================
ERROR: test_package_recursion (test.test_cmd_line_script.CmdLineTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/root/cpython/Lib/test/test_cmd_line_script.py", line 379, in test_package_recursion
    self._check_import_error(["-m", "test_pkg"], msg, cwd=script_dir)
  File "/root/cpython/Lib/test/test_cmd_line_script.py", line 148, in _check_import_error
    print('Output from test script %r:' % script_exec_args)
TypeError: not all arguments converted during string formatting

----------------------------------------------------------------------

Ran 44 tests in 4.936s

FAILED (errors=2)
test test_cmd_line_script failed
test_cmd_line_script failed

== Tests result: FAILURE ==

1 test failed:
    test_cmd_line_script

Total duration: 5.0 sec
Tests result: FAILURE