diff --git a/au_test_harness/au_test.py b/au_test_harness/au_test.py
index 9cdef57..c60f30b 100644
--- a/au_test_harness/au_test.py
+++ b/au_test_harness/au_test.py
@@ -22,7 +22,6 @@
 from chromite.lib import signals
 from crostestutils.au_test_harness import cros_test_proxy
 from crostestutils.au_test_harness import gce_au_worker
-from crostestutils.au_test_harness import real_au_worker
 from crostestutils.au_test_harness import update_exception
 from crostestutils.au_test_harness import vm_au_worker
 
@@ -63,7 +62,7 @@
     elif  options.type == 'gce':
       cls.worker_class = gce_au_worker.GCEAUWorker
     else:
-      cls.worker_class = real_au_worker.RealAUWorker
+      raise ValueError('Invalid au_worker type: %s' % options.type)
 
     # Cache away options to instantiate workers later.
     cls.options = options
@@ -339,7 +338,7 @@
       frame: Current stack frame. See signal.signal for details on |signum| and
           |frame|.
     """
-    logging.warning('Received signal %d' % signum)
+    logging.warning('Received signal %d', signum)
     if signum:
       # If we've been invoked because of a signal, ignore delivery of that
       # signal from this point forward. The invoking context of this method
@@ -353,5 +352,5 @@
       signal.signal(signal.SIGTERM, signal.SIG_IGN)
     self.worker.CleanUp()
     if not signals.RelaySignal(original_handler, signum, frame):
-      logging.warning('Failed to relay signal %d to original handler.' % signum)
+      logging.warning('Failed to relay signal %d to original handler.', signum)
       sys.exit('Received signal %d.' % signum)
diff --git a/au_test_harness/cros_au_test_harness.py b/au_test_harness/cros_au_test_harness.py
index c9e94b9..454fd3b 100755
--- a/au_test_harness/cros_au_test_harness.py
+++ b/au_test_harness/cros_au_test_harness.py
@@ -125,7 +125,7 @@
     opts: Parsed opts.
   """
 
-  if not opts.type in ['real', 'vm', 'gce']:
+  if not opts.type in ['vm', 'gce']:
     parser.error('Failed to specify valid test type.')
 
   def _IsValidImage(image):
@@ -203,7 +203,7 @@
                       help='Only runs tests with specific prefix i.e. '
                       'testFullUpdateWipeStateful.')
   parser.add_argument('-p', '--type', default='vm',
-                      help='type of test to run: [vm, real, gce]. Default: vm.')
+                      help='type of test to run: [vm, gce]. Default: vm.')
   parser.add_argument('--verbose', default=True, action='store_true',
                       help='Print out rather than capture output as much as '
                       'possible.')
@@ -256,12 +256,8 @@
       if (opts.type == 'vm' or opts.type == 'gce') and opts.parallel:
         _RunTestsInParallel(opts)
       else:
-        # TODO(sosa) - Take in a machine pool for a real test.
-        # Can't run in parallel with only one remote device.
-        test_suite = _PrepareTestSuite(opts)
-        test_result = unittest.TextTestRunner().run(test_suite)
-        if not test_result.wasSuccessful():
-          cros_build_lib.Die('Test harness failed.')
+        cros_build_lib.Die('Test harness failed. unsupported test type %s' %
+                           opts.type)
 
     finally:
       if my_server:
diff --git a/au_test_harness/gce_au_worker.py b/au_test_harness/gce_au_worker.py
index 9792639..a33dd69 100644
--- a/au_test_harness/gce_au_worker.py
+++ b/au_test_harness/gce_au_worker.py
@@ -124,8 +124,8 @@
                   proxy_port=None, payload_signing_key=None):
     """Updates the image on the GCE instance.
 
-    Unlike vm_au_worker or real_au_worker, UpdateImage always creates a new
-    image and a new instance.
+    Unlike vm_au_worker, UpdateImage always creates a new image and a new
+    instance.
     """
     # Delete existing resources in the background if any.
     bg_delete = Process(target=self._DeleteExistingResources)
diff --git a/au_test_harness/real_au_worker.py b/au_test_harness/real_au_worker.py
deleted file mode 100644
index 2a21661..0000000
--- a/au_test_harness/real_au_worker.py
+++ /dev/null
@@ -1,74 +0,0 @@
-# -*- coding: utf-8 -*-
-# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""Module containing class that implements an au_worker for a test device."""
-
-from __future__ import print_function
-
-import constants
-from chromite.lib import cros_build_lib
-from chromite.lib import path_util
-from crostestutils.au_test_harness import au_worker
-
-
-class RealAUWorker(au_worker.AUWorker):
-  """Test harness for updating real images."""
-
-  def __init__(self, options, test_results_root):
-    """Processes non-vm-specific options."""
-    super(RealAUWorker, self).__init__(options, test_results_root)
-    self.remote = options.remote
-    if not self.remote:
-      cros_build_lib.Die('We require a remote address for tests.')
-
-  def PrepareBase(self, image_path, signed_base=False):
-    """Auto-update to base image to prepare for test."""
-    return self.PrepareRealBase(image_path, signed_base)
-
-  def UpdateImage(self, image_path, src_image_path='', stateful_change='old',
-                  proxy_port=None, payload_signing_key=None):
-    """Updates a remote image using image_to_live.sh."""
-    stateful_change_flag = self.GetStatefulChangeFlag(stateful_change)
-    cmd = [os.path.join(constants.CROSTESTUTILS_DIR, 'image_to_live.sh'),
-           '--remote=%s' % self.remote,
-           stateful_change_flag,
-           '--verify',
-          ]
-    self.AppendUpdateFlags(cmd, image_path, src_image_path, proxy_port,
-                           payload_signing_key)
-    self.RunUpdateCmd(cmd)
-
-  def UpdateUsingPayload(self, update_path, stateful_change='old',
-                         proxy_port=None):
-    """Updates a remote image using image_to_live.sh."""
-    stateful_change_flag = self.GetStatefulChangeFlag(stateful_change)
-    cmd = [os.path.join(constants.CROSTESTUTILS_DIR, 'image_to_live.sh'),
-           '--payload=%s' % update_path,
-           '--remote=%s' % self.remote,
-           stateful_change_flag,
-           '--verify',
-          ]
-    if proxy_port:
-      cmd.append('--proxy_port=%s' % proxy_port)
-    self.RunUpdateCmd(cmd)
-
-  def VerifyImage(self, unittest, percent_required_to_pass=100, test=''):
-    """Verifies an image using test_that with verification suite."""
-    test_directory, _ = self.GetNextResultsPath('autotest_tests')
-    if not test:
-      test = self.verify_suite
-
-    cmd = ['test_that', '--no-quickmerge', '--results_dir=%s' % test_directory,
-           self.remote, test]
-    if self.ssh_private_key is not None:
-      cmd.append('--ssh_private_key=%s' %
-                 path_util.ToChrootPath(self.ssh_private_key))
-
-    result = cros_build_lib.RunCommand(cmd, error_code_ok=True,
-                                       enter_chroot=True, redirect_stdout=True,
-                                       cwd=constants.CROSUTILS_DIR)
-
-    return self.AssertEnoughTestsPassed(unittest, result.output,
-                                        percent_required_to_pass)