diff --git a/run_tempest.sh b/run_tempest.sh
index 0f32045..a704684 100755
--- a/run_tempest.sh
+++ b/run_tempest.sh
@@ -104,9 +104,9 @@
   fi
 
   if [ $serial -eq 1 ]; then
-      ${wrapper} testr run --subunit $testrargs | ${wrapper} subunit-2to1 | ${wrapper} tools/colorizer.py
+      ${wrapper} testr run --subunit $testrargs | ${wrapper} subunit-trace -n -f
   else
-      ${wrapper} testr run --parallel --subunit $testrargs | ${wrapper} subunit-2to1 | ${wrapper} tools/colorizer.py
+      ${wrapper} testr run --parallel --subunit $testrargs | ${wrapper} subunit-trace -n -f
   fi
 }
 
diff --git a/tools/colorizer.py b/tools/colorizer.py
deleted file mode 100755
index 3f68a51..0000000
--- a/tools/colorizer.py
+++ /dev/null
@@ -1,328 +0,0 @@
-#!/usr/bin/env python
-
-# Copyright (c) 2013, Nebula, Inc.
-# Copyright 2010 United States Government as represented by the
-# Administrator of the National Aeronautics and Space Administration.
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-#
-# Colorizer Code is borrowed from Twisted:
-# Copyright (c) 2001-2010 Twisted Matrix Laboratories.
-#
-#    Permission is hereby granted, free of charge, to any person obtaining
-#    a copy of this software and associated documentation files (the
-#    "Software"), to deal in the Software without restriction, including
-#    without limitation the rights to use, copy, modify, merge, publish,
-#    distribute, sublicense, and/or sell copies of the Software, and to
-#    permit persons to whom the Software is furnished to do so, subject to
-#    the following conditions:
-#
-#    The above copyright notice and this permission notice shall be
-#    included in all copies or substantial portions of the Software.
-#
-#    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-#    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-#    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-#    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-#    LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-#    OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-#    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-"""Display a subunit stream through a colorized unittest test runner."""
-
-import heapq
-import sys
-import unittest
-
-import subunit
-import testtools
-
-
-class _AnsiColorizer(object):
-    """A colorizer is an object that loosely wraps around a stream
-
-    allowing callers to write text to the stream in a particular color.
-
-    Colorizer classes must implement C{supported()} and C{write(text, color)}.
-    """
-    _colors = dict(black=30, red=31, green=32, yellow=33,
-                   blue=34, magenta=35, cyan=36, white=37)
-
-    def __init__(self, stream):
-        self.stream = stream
-
-    def supported(cls, stream=sys.stdout):
-        """Check the current platform supports coloring terminal output
-
-        A class method that returns True if the current platform supports
-        coloring terminal output using this method. Returns False otherwise.
-        """
-        if not stream.isatty():
-            return False  # auto color only on TTYs
-        try:
-            import curses
-        except ImportError:
-            return False
-        else:
-            try:
-                try:
-                    return curses.tigetnum("colors") > 2
-                except curses.error:
-                    curses.setupterm()
-                    return curses.tigetnum("colors") > 2
-            except Exception:
-                # guess false in case of error
-                return False
-    supported = classmethod(supported)
-
-    def write(self, text, color):
-        """Write the given text to the stream in the given color.
-
-        @param text: Text to be written to the stream.
-
-        @param color: A string label for a color. e.g. 'red', 'white'.
-        """
-        color = self._colors[color]
-        self.stream.write('\x1b[%s;1m%s\x1b[0m' % (color, text))
-
-
-class _Win32Colorizer(object):
-    """See _AnsiColorizer docstring."""
-    def __init__(self, stream):
-        import win32console
-        red, green, blue, bold = (win32console.FOREGROUND_RED,
-                                  win32console.FOREGROUND_GREEN,
-                                  win32console.FOREGROUND_BLUE,
-                                  win32console.FOREGROUND_INTENSITY)
-        self.stream = stream
-        self.screenBuffer = win32console.GetStdHandle(
-            win32console.STD_OUT_HANDLE)
-        self._colors = {'normal': red | green | blue,
-                        'red': red | bold,
-                        'green': green | bold,
-                        'blue': blue | bold,
-                        'yellow': red | green | bold,
-                        'magenta': red | blue | bold,
-                        'cyan': green | blue | bold,
-                        'white': red | green | blue | bold}
-
-    def supported(cls, stream=sys.stdout):
-        try:
-            import win32console
-            screenBuffer = win32console.GetStdHandle(
-                win32console.STD_OUT_HANDLE)
-        except ImportError:
-            return False
-        import pywintypes
-        try:
-            screenBuffer.SetConsoleTextAttribute(
-                win32console.FOREGROUND_RED |
-                win32console.FOREGROUND_GREEN |
-                win32console.FOREGROUND_BLUE)
-        except pywintypes.error:
-            return False
-        else:
-            return True
-    supported = classmethod(supported)
-
-    def write(self, text, color):
-        color = self._colors[color]
-        self.screenBuffer.SetConsoleTextAttribute(color)
-        self.stream.write(text)
-        self.screenBuffer.SetConsoleTextAttribute(self._colors['normal'])
-
-
-class _NullColorizer(object):
-    """See _AnsiColorizer docstring."""
-    def __init__(self, stream):
-        self.stream = stream
-
-    def supported(cls, stream=sys.stdout):
-        return True
-    supported = classmethod(supported)
-
-    def write(self, text, color):
-        self.stream.write(text)
-
-
-def get_elapsed_time_color(elapsed_time):
-    if elapsed_time > 1.0:
-        return 'red'
-    elif elapsed_time > 0.25:
-        return 'yellow'
-    else:
-        return 'green'
-
-
-class NovaTestResult(testtools.TestResult):
-    def __init__(self, stream, descriptions, verbosity):
-        super(NovaTestResult, self).__init__()
-        self.stream = stream
-        self.showAll = verbosity > 1
-        self.num_slow_tests = 10
-        self.slow_tests = []  # this is a fixed-sized heap
-        self.colorizer = None
-        # NOTE(vish): reset stdout for the terminal check
-        stdout = sys.stdout
-        sys.stdout = sys.__stdout__
-        for colorizer in [_Win32Colorizer, _AnsiColorizer, _NullColorizer]:
-            if colorizer.supported():
-                self.colorizer = colorizer(self.stream)
-                break
-        sys.stdout = stdout
-        self.start_time = None
-        self.last_time = {}
-        self.results = {}
-        self.last_written = None
-
-    def _writeElapsedTime(self, elapsed):
-        color = get_elapsed_time_color(elapsed)
-        self.colorizer.write("  %.2f" % elapsed, color)
-
-    def _addResult(self, test, *args):
-        try:
-            name = test.id()
-        except AttributeError:
-            name = 'Unknown.unknown'
-        test_class, test_name = name.rsplit('.', 1)
-
-        elapsed = (self._now() - self.start_time).total_seconds()
-        item = (elapsed, test_class, test_name)
-        if len(self.slow_tests) >= self.num_slow_tests:
-            heapq.heappushpop(self.slow_tests, item)
-        else:
-            heapq.heappush(self.slow_tests, item)
-
-        self.results.setdefault(test_class, [])
-        self.results[test_class].append((test_name, elapsed) + args)
-        self.last_time[test_class] = self._now()
-        self.writeTests()
-
-    def _writeResult(self, test_name, elapsed, long_result, color,
-                     short_result, success):
-        if self.showAll:
-            self.stream.write('    %s' % str(test_name).ljust(66))
-            self.colorizer.write(long_result, color)
-            if success:
-                self._writeElapsedTime(elapsed)
-            self.stream.writeln()
-        else:
-            self.colorizer.write(short_result, color)
-
-    def addSuccess(self, test):
-        super(NovaTestResult, self).addSuccess(test)
-        self._addResult(test, 'OK', 'green', '.', True)
-
-    def addFailure(self, test, err):
-        if test.id() == 'process-returncode':
-            return
-        super(NovaTestResult, self).addFailure(test, err)
-        self._addResult(test, 'FAIL', 'red', 'F', False)
-
-    def addError(self, test, err):
-        super(NovaTestResult, self).addFailure(test, err)
-        self._addResult(test, 'ERROR', 'red', 'E', False)
-
-    def addSkip(self, test, reason=None, details=None):
-        super(NovaTestResult, self).addSkip(test, reason, details)
-        self._addResult(test, 'SKIP', 'blue', 'S', True)
-
-    def startTest(self, test):
-        self.start_time = self._now()
-        super(NovaTestResult, self).startTest(test)
-
-    def writeTestCase(self, cls):
-        if not self.results.get(cls):
-            return
-        if cls != self.last_written:
-            self.colorizer.write(cls, 'white')
-            self.stream.writeln()
-        for result in self.results[cls]:
-            self._writeResult(*result)
-        del self.results[cls]
-        self.stream.flush()
-        self.last_written = cls
-
-    def writeTests(self):
-        time = self.last_time.get(self.last_written, self._now())
-        if not self.last_written or (self._now() - time).total_seconds() > 2.0:
-            diff = 3.0
-            while diff > 2.0:
-                classes = self.results.keys()
-                oldest = min(classes, key=lambda x: self.last_time[x])
-                diff = (self._now() - self.last_time[oldest]).total_seconds()
-                self.writeTestCase(oldest)
-        else:
-            self.writeTestCase(self.last_written)
-
-    def done(self):
-        self.stopTestRun()
-
-    def stopTestRun(self):
-        for cls in list(self.results.iterkeys()):
-            self.writeTestCase(cls)
-        self.stream.writeln()
-        self.writeSlowTests()
-
-    def writeSlowTests(self):
-        # Pare out 'fast' tests
-        slow_tests = [item for item in self.slow_tests
-                      if get_elapsed_time_color(item[0]) != 'green']
-        if slow_tests:
-            slow_total_time = sum(item[0] for item in slow_tests)
-            slow = ("Slowest %i tests took %.2f secs:"
-                    % (len(slow_tests), slow_total_time))
-            self.colorizer.write(slow, 'yellow')
-            self.stream.writeln()
-            last_cls = None
-            # sort by name
-            for elapsed, cls, name in sorted(slow_tests,
-                                             key=lambda x: x[1] + x[2]):
-                if cls != last_cls:
-                    self.colorizer.write(cls, 'white')
-                    self.stream.writeln()
-                last_cls = cls
-                self.stream.write('    %s' % str(name).ljust(68))
-                self._writeElapsedTime(elapsed)
-                self.stream.writeln()
-
-    def printErrors(self):
-        if self.showAll:
-            self.stream.writeln()
-        self.printErrorList('ERROR', self.errors)
-        self.printErrorList('FAIL', self.failures)
-
-    def printErrorList(self, flavor, errors):
-        for test, err in errors:
-            self.colorizer.write("=" * 70, 'red')
-            self.stream.writeln()
-            self.colorizer.write(flavor, 'red')
-            self.stream.writeln(": %s" % test.id())
-            self.colorizer.write("-" * 70, 'red')
-            self.stream.writeln()
-            self.stream.writeln("%s" % err)
-
-
-test = subunit.ProtocolTestCase(sys.stdin, passthrough=None)
-
-if sys.version_info[0:2] <= (2, 6):
-    runner = unittest.TextTestRunner(verbosity=2)
-else:
-    runner = unittest.TextTestRunner(verbosity=2, resultclass=NovaTestResult)
-
-if runner.run(test).wasSuccessful():
-    exit_code = 0
-else:
-    exit_code = 1
-sys.exit(exit_code)