Running tests from the directory containing a space: '/home/serhiy/py/cpy thon'.

$ ./python -m test -vuall test_distutils
== CPython 3.7.0a1+ (heads/master:5e02c7826f, Sep 22 2017, 13:23:33) [GCC 6.3.0 20170406]
== Linux-4.10.0-35-generic-x86_64-with-debian-stretch-sid little-endian
== cwd: /home/serhiy/py/cpy thon/build/test_python_11135
== CPU count: 8
== encodings: locale=UTF-8, FS=utf-8
Run tests sequentially
0:00:00 load avg: 0.09 [1/1] test_distutils
test_no_optimize_flag (distutils.tests.test_bdist_rpm.BuildRpmTestCase) ... /var/tmp/rpm-tmp.ufRiE4: 28: /var/tmp/rpm-tmp.ufRiE4: /home/serhiy/py/cpy: not found
error: Bad exit status from /var/tmp/rpm-tmp.ufRiE4 (%build)
    Bad exit status from /var/tmp/rpm-tmp.ufRiE4 (%build)
ERROR
test_quiet (distutils.tests.test_bdist_rpm.BuildRpmTestCase) ... /var/tmp/rpm-tmp.uBva85: 28: /var/tmp/rpm-tmp.uBva85: /home/serhiy/py/cpy: not found
error: Bad exit status from /var/tmp/rpm-tmp.uBva85 (%build)
    Bad exit status from /var/tmp/rpm-tmp.uBva85 (%build)
ERROR
...
======================================================================
ERROR: test_no_optimize_flag (distutils.tests.test_bdist_rpm.BuildRpmTestCase)
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Traceback (most recent call last):
  File "/home/serhiy/py/cpy thon/Lib/distutils/tests/test_bdist_rpm.py", line 120, in test_no_optimize_flag
    cmd.run()
  File "/home/serhiy/py/cpy thon/Lib/distutils/command/bdist_rpm.py", line 366, in run
    self.spawn(rpm_cmd)
  File "/home/serhiy/py/cpy thon/Lib/distutils/cmd.py", line 365, in spawn
    spawn(cmd, search_path, dry_run=self.dry_run)
  File "/home/serhiy/py/cpy thon/Lib/distutils/spawn.py", line 36, in spawn
    _spawn_posix(cmd, search_path, dry_run=dry_run)
  File "/home/serhiy/py/cpy thon/Lib/distutils/spawn.py", line 159, in _spawn_posix
    % (cmd, exit_status))
distutils.errors.DistutilsExecError: command 'rpmbuild' failed with exit status 1

======================================================================
ERROR: test_quiet (distutils.tests.test_bdist_rpm.BuildRpmTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/serhiy/py/cpy thon/Lib/distutils/tests/test_bdist_rpm.py", line 77, in test_quiet
    cmd.run()
  File "/home/serhiy/py/cpy thon/Lib/distutils/command/bdist_rpm.py", line 366, in run
    self.spawn(rpm_cmd)
  File "/home/serhiy/py/cpy thon/Lib/distutils/cmd.py", line 365, in spawn
    spawn(cmd, search_path, dry_run=self.dry_run)
  File "/home/serhiy/py/cpy thon/Lib/distutils/spawn.py", line 36, in spawn
    _spawn_posix(cmd, search_path, dry_run=dry_run)
  File "/home/serhiy/py/cpy thon/Lib/distutils/spawn.py", line 159, in _spawn_posix
    % (cmd, exit_status))
distutils.errors.DistutilsExecError: command 'rpmbuild' failed with exit status 1

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See also issue31548.