self = <ipatests.test_integration.test_replica_promotion.TestSubCAkeyReplication object at 0x7f833bd48c80>
    def test_scale_add_subca(self):
        master = self.master
        replica = self.replicas[0]
        subcas = {}
        for i in range(0, 16):
            name = "_".join((self.SUBCA_MASTER, str(i)))
            cn = "_".join((self.SUBCA_MASTER_CN, str(i)))
>           subcas[name] = self.add_subca(master, name, cn)
test_integration/test_replica_promotion.py:817: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
test_integration/test_replica_promotion.py:611: in add_subca
    result = host.run_command([
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
self = <ipatests.pytest_ipa.integration.host.Host master.ipa.test (master)>
argv = ['ipa', 'ca-add', 'test_subca_master_8', '--subject', 'cn=test_subca_master_8', '--desc', ...]
set_env = True, stdin_text = None, log_stdout = True, raiseonerr = True
cwd = None, bg = False, encoding = 'utf-8', ok_returncode = 0
    def run_command(self, argv, set_env=True, stdin_text=None,
                    log_stdout=True, raiseonerr=True,
                    cwd=None, bg=False, encoding='utf-8', ok_returncode=0):
        """Wrapper around run_command to log stderr on raiseonerr=True
        :param ok_returncode: return code considered to be correct,
                              you can pass an integer or sequence of integers
        """
        result = super().run_command(
            argv, set_env=set_env, stdin_text=stdin_text,
            log_stdout=log_stdout, raiseonerr=False, cwd=cwd, bg=bg,
            encoding=encoding
        )
        # in FIPS mode SSH may print noise to stderr, remove the string
        # "FIPS mode initialized" + optional newline.
        result.stderr_bytes = FIPS_NOISE_RE.sub(b'', result.stderr_bytes)
        try:
            result_ok = result.returncode in ok_returncode
        except TypeError:
            result_ok = result.returncode == ok_returncode
        if not result_ok and raiseonerr:
            result.log.error('stderr: %s', result.stderr_text)
>           raise subprocess.CalledProcessError(
                result.returncode, argv,
                result.stdout_text, result.stderr_text
            )
E           subprocess.CalledProcessError: Command '['ipa', 'ca-add', 'test_subca_master_8', '--subject', 'cn=test_subca_master_8', '--desc', 'subca']' returned non-zero exit status 1.
pytest_ipa/integration/host.py:202: CalledProcessError
----------------------------- Captured stderr call -----------------------------
ipa: ERROR: stderr: ipa: ERROR: Request failed with status 500: Non-2xx response from CA REST API: 500.