test_push always failed due to android duts used in test_push were removed from the testbed. Example:

03/22 14:13:04.310 DEBUG|          adb_host:0397| Command: timeout --signal=9 3601 adb -s 84B7N16625000220 get-state
03/22 14:13:04.310 DEBUG|          ssh_host:0284| Running (ssh) 'timeout --signal=9 3601 adb -s 84B7N16625000220 get-state'
03/22 14:13:04.496 ERROR|        base_utils:0280| [stderr] error: device '84B7N16625000220' not found
03/22 14:13:04.499 ERROR|            verify:0031| command execution error
* Command: 
    /usr/bin/ssh -a -x  -t  -o ControlPath=/tmp/_autotmp_6bss8yssh-
    master/socket -o StrictHostKeyChecking=no -o
    UserKnownHostsFile=/tmp/tmpHpYpbI -o BatchMode=yes -o ConnectTimeout=30 -o
    ServerAliveInterval=300 -l root -p 22 android1758-row1-rack7-test-
    station-4.cros " if type \"logger\" > /dev/null 2>&1; then logger -tag
    \"autotest\" \"server[stack::adb_run|_device_run|run] -> ssh_run(timeout
    --signal=9 3601 adb -s 84B7N16625000220 get-state)\";fi; timeout
    --signal=9 3601 adb -s 84B7N16625000220 get-state"
Exit status: 1
Duration: 0.147535085678

stderr:
error: device '84B7N16625000220' not found
Traceback (most recent call last):
  File "/usr/local/autotest/server/control_segments/verify", line 27, in verify
    target.verify()
  File "/usr/local/autotest/server/hosts/testbed.py", line 176, in verify
    device.verify()
  File "/usr/local/autotest/client/common_lib/hosts/base_classes.py", line 316, in verify
    self.verify_connectivity()
  File "/usr/local/autotest/server/hosts/adb_host.py", line 873, in verify_connectivity
    if not self.is_device_ready():
  File "/usr/local/autotest/server/hosts/adb_host.py", line 863, in is_device_ready
    desc='Waiting for device state to be `device`')
  File "/usr/local/autotest/client/common_lib/site_utils.py", line 965, in poll_for_condition
    value = condition()
  File "/usr/local/autotest/server/hosts/adb_host.py", line 861, in <lambda>
    lambda: self.adb_run('get-state').stdout.strip() == 'device',
  File "/usr/local/autotest/server/hosts/adb_host.py", line 301, in adb_run
    return self._device_run(ADB_CMD, command, **kwargs)
  File "/usr/local/autotest/server/hosts/adb_host.py", line 403, in _device_run
    connect_timeout=connect_timeout, args=args)
  File "/usr/local/autotest/server/hosts/teststation_host.py", line 136, in run
    return super(TestStationHost, self).run(cmd, *args, **dargs)
  File "/usr/local/autotest/server/hosts/ssh_host.py", line 295, in run
    ssh_failure_retry_ok)
  File "/usr/local/autotest/server/hosts/ssh_host.py", line 252, in _run
    raise error.AutoservRunError("command execution error", result)
AutoservRunError: command execution error
* Command: 
    /usr/bin/ssh -a -x  -t  -o ControlPath=/tmp/_autotmp_6bss8yssh-
    master/socket -o StrictHostKeyChecking=no -o
    UserKnownHostsFile=/tmp/tmpHpYpbI -o BatchMode=yes -o ConnectTimeout=30 -o
    ServerAliveInterval=300 -l root -p 22 android1758-row1-rack7-test-
    station-4.cros " if type \"logger\" > /dev/null 2>&1; then logger -tag
    \"autotest\" \"server[stack::adb_run|_device_run|run] -> ssh_run(timeout
    --signal=9 3601 adb -s 84B7N16625000220 get-state)\";fi; timeout
    --signal=9 3601 adb -s 84B7N16625000220 get-state"
Exit status: 1
Duration: 0.147535085678