diff --git a/googletest/test/gtest_color_test.py b/googletest/test/gtest_color_test.py
index d02a53ed..7d3e888a 100755
--- a/googletest/test/gtest_color_test.py
+++ b/googletest/test/gtest_color_test.py
@@ -36,7 +36,6 @@ __author__ = 'wan@google.com (Zhanyong Wan)'
 import os
 import gtest_test_utils
 
-
 IS_WINDOWS = os.name = 'nt'
 
 COLOR_ENV_VAR = 'GTEST_COLOR'
diff --git a/googletest/test/gtest_filter_unittest.py b/googletest/test/gtest_filter_unittest.py
index ec0b151b..92cc77c8 100755
--- a/googletest/test/gtest_filter_unittest.py
+++ b/googletest/test/gtest_filter_unittest.py
@@ -44,12 +44,8 @@ __author__ = 'wan@google.com (Zhanyong Wan)'
 
 import os
 import re
-try:
-  from sets import Set as set  # For Python 2.3 compatibility
-except ImportError:
-  pass
+import sets
 import sys
-
 import gtest_test_utils
 
 # Constants.
@@ -59,10 +55,12 @@ import gtest_test_utils
 # script in a subprocess to print whether the variable is STILL in
 # os.environ.  We then use 'eval' to parse the child's output so that an
 # exception is thrown if the input is anything other than 'True' nor 'False'.
-os.environ['EMPTY_VAR'] = ''
-child = gtest_test_utils.Subprocess(
-    [sys.executable, '-c', 'import os; print(\'EMPTY_VAR\' in os.environ)'])
-CAN_PASS_EMPTY_ENV = eval(child.output)
+CAN_PASS_EMPTY_ENV = False
+if sys.executable:
+  os.environ['EMPTY_VAR'] = ''
+  child = gtest_test_utils.Subprocess(
+      [sys.executable, '-c', 'import os; print \'EMPTY_VAR\' in os.environ'])
+  CAN_PASS_EMPTY_ENV = eval(child.output)
 
 
 # Check if this platform can unset environment variables in child processes.
@@ -71,11 +69,14 @@ CAN_PASS_EMPTY_ENV = eval(child.output)
 # is NO LONGER in os.environ.
 # We use 'eval' to parse the child's output so that an exception
 # is thrown if the input is neither 'True' nor 'False'.
-os.environ['UNSET_VAR'] = 'X'
-del os.environ['UNSET_VAR']
-child = gtest_test_utils.Subprocess(
-    [sys.executable, '-c', 'import os; print(\'UNSET_VAR\' not in os.environ)'])
-CAN_UNSET_ENV = eval(child.output)
+CAN_UNSET_ENV = False
+if sys.executable:
+  os.environ['UNSET_VAR'] = 'X'
+  del os.environ['UNSET_VAR']
+  child = gtest_test_utils.Subprocess(
+      [sys.executable, '-c', 'import os; print \'UNSET_VAR\' not in os.environ'
+      ])
+  CAN_UNSET_ENV = eval(child.output)
 
 
 # Checks if we should test with an empty filter. This doesn't
@@ -97,7 +98,7 @@ SHARD_STATUS_FILE_ENV_VAR = 'GTEST_SHARD_STATUS_FILE'
 FILTER_FLAG = 'gtest_filter'
 
 # The command line flag for including disabled tests.
-ALSO_RUN_DISABED_TESTS_FLAG = 'gtest_also_run_disabled_tests'
+ALSO_RUN_DISABLED_TESTS_FLAG = 'gtest_also_run_disabled_tests'
 
 # Command to run the gtest_filter_unittest_ program.
 COMMAND = gtest_test_utils.GetTestExecutablePath('gtest_filter_unittest_')
@@ -246,14 +247,14 @@ class GTestFilterUnitTest(gtest_test_utils.TestCase):
     for slice_var in list_of_sets:
       full_partition.extend(slice_var)
     self.assertEqual(len(set_var), len(full_partition))
-    self.assertEqual(set(set_var), set(full_partition))
+    self.assertEqual(sets.Set(set_var), sets.Set(full_partition))
 
   def AdjustForParameterizedTests(self, tests_to_run):
     """Adjust tests_to_run in case value parameterized tests are disabled."""
 
     global param_tests_present
     if not param_tests_present:
-      return list(set(tests_to_run) - set(PARAM_TESTS))
+      return list(sets.Set(tests_to_run) - sets.Set(PARAM_TESTS))
     else:
       return tests_to_run
 
@@ -294,6 +295,7 @@ class GTestFilterUnitTest(gtest_test_utils.TestCase):
     Runs all shards of gtest_filter_unittest_ with the given filter, and
     verifies that the right set of tests were run. The union of tests run
     on each shard should be identical to tests_to_run, without duplicates.
+    If check_exit_0, .
 
     Args:
       gtest_filter: A filter to apply to the tests.
@@ -339,7 +341,7 @@ class GTestFilterUnitTest(gtest_test_utils.TestCase):
     tests_to_run = self.AdjustForParameterizedTests(tests_to_run)
 
     # Construct the command line.
-    args = ['--%s' % ALSO_RUN_DISABED_TESTS_FLAG]
+    args = ['--%s' % ALSO_RUN_DISABLED_TESTS_FLAG]
     if gtest_filter is not None:
       args.append('--%s=%s' % (FILTER_FLAG, gtest_filter))
 
diff --git a/googletest/test/gtest_list_tests_unittest.py b/googletest/test/gtest_list_tests_unittest.py
index f2d2fd1b..0844f98a 100755
--- a/googletest/test/gtest_list_tests_unittest.py
+++ b/googletest/test/gtest_list_tests_unittest.py
@@ -39,9 +39,8 @@ Google Test) the command line flags.
 
 __author__ = 'phanna@google.com (Patrick Hanna)'
 
-import gtest_test_utils
 import re
-
+import gtest_test_utils
 
 # Constants.
 
@@ -71,7 +70,7 @@ FooTest\.
 TypedTest/0\.  # TypeParam = (VeryLo{245}|class VeryLo{239})\.\.\.
   TestA
   TestB
-TypedTest/1\.  # TypeParam = int\s*\*( __ptr64)?
+TypedTest/1\.  # TypeParam = int\s*\*
   TestA
   TestB
 TypedTest/2\.  # TypeParam = .*MyArray<bool,\s*42>
@@ -80,7 +79,7 @@ TypedTest/2\.  # TypeParam = .*MyArray<bool,\s*42>
 My/TypeParamTest/0\.  # TypeParam = (VeryLo{245}|class VeryLo{239})\.\.\.
   TestA
   TestB
-My/TypeParamTest/1\.  # TypeParam = int\s*\*( __ptr64)?
+My/TypeParamTest/1\.  # TypeParam = int\s*\*
   TestA
   TestB
 My/TypeParamTest/2\.  # TypeParam = .*MyArray<bool,\s*42>
@@ -123,6 +122,7 @@ def Run(args):
 
 # The unit test.
 
+
 class GTestListTestsUnitTest(gtest_test_utils.TestCase):
   """Tests using the --gtest_list_tests flag to list all tests."""
 
diff --git a/googletest/test/gtest_output_test.py b/googletest/test/gtest_output_test.py
index 78a00156..e431653a 100755
--- a/googletest/test/gtest_output_test.py
+++ b/googletest/test/gtest_output_test.py
@@ -31,6 +31,7 @@
 
 """Tests the text output of Google C++ Testing Framework.
 
+
 SYNOPSIS
        gtest_output_test.py --build_dir=BUILD/DIR --gengolden
          # where BUILD/DIR contains the built gtest_output_test_ file.
@@ -51,6 +52,7 @@ import gtest_test_utils
 GENGOLDEN_FLAG = '--gengolden'
 CATCH_EXCEPTIONS_ENV_VAR_NAME = 'GTEST_CATCH_EXCEPTIONS'
 
+IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
 IS_WINDOWS = os.name == 'nt'
 
 # TODO(vladl@google.com): remove the _lin suffix.
@@ -250,11 +252,12 @@ test_list = GetShellCommandOutput(COMMAND_LIST_TESTS)
 SUPPORTS_DEATH_TESTS = 'DeathTest' in test_list
 SUPPORTS_TYPED_TESTS = 'TypedTest' in test_list
 SUPPORTS_THREADS = 'ExpectFailureWithThreadsTest' in test_list
-SUPPORTS_STACK_TRACES = False
+SUPPORTS_STACK_TRACES = IS_LINUX
 
 CAN_GENERATE_GOLDEN_FILE = (SUPPORTS_DEATH_TESTS and
                             SUPPORTS_TYPED_TESTS and
                             SUPPORTS_THREADS and
+                            SUPPORTS_STACK_TRACES and
                             not IS_WINDOWS)
 
 class GTestOutputTest(gtest_test_utils.TestCase):
@@ -280,7 +283,7 @@ class GTestOutputTest(gtest_test_utils.TestCase):
   def testOutput(self):
     output = GetOutputOfAllCommands()
 
-    golden_file = open(GOLDEN_PATH, 'r')
+    golden_file = open(GOLDEN_PATH, 'rb')
     # A mis-configured source control system can cause \r appear in EOL
     # sequences when we read the golden file irrespective of an operating
     # system used. Therefore, we need to strip those \r's from newlines
@@ -331,9 +334,9 @@ if __name__ == '__main__':
     else:
       message = (
           """Unable to write a golden file when compiled in an environment
-that does not support all the required features (death tests, typed tests,
-and multiple threads).  Please generate the golden file using a binary built
-with those features enabled.""")
+that does not support all the required features (death tests,
+typed tests, stack traces, and multiple threads).
+Please build this test and generate the golden file using Blaze on Linux.""")
 
       sys.stderr.write(message)
       sys.exit(1)
diff --git a/googletest/test/gtest_test_utils.py b/googletest/test/gtest_test_utils.py
index d2b6748d..89d1469a 100755
--- a/googletest/test/gtest_test_utils.py
+++ b/googletest/test/gtest_test_utils.py
@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-#
 # Copyright 2006, Google Inc.
 # All rights reserved.
 #
@@ -33,10 +31,15 @@
 
 __author__ = 'wan@google.com (Zhanyong Wan)'
 
-import atexit
 import os
-import shutil
 import sys
+
+IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
+IS_WINDOWS = os.name == 'nt'
+IS_CYGWIN = os.name == 'posix' and 'CYGWIN' in os.uname()[0]
+
+import atexit
+import shutil
 import tempfile
 import unittest
 _test_module = unittest
@@ -53,9 +56,6 @@ except:
 
 GTEST_OUTPUT_VAR_NAME = 'GTEST_OUTPUT'
 
-IS_WINDOWS = os.name == 'nt'
-IS_CYGWIN = os.name == 'posix' and 'CYGWIN' in os.uname()[0]
-
 # The environment variable for specifying the path to the premature-exit file.
 PREMATURE_EXIT_FILE_ENV_VAR = 'TEST_PREMATURE_EXIT_FILE'
 
@@ -178,7 +178,7 @@ def GetTestExecutablePath(executable_name, build_dir=None):
         'Unable to find the test binary "%s". Please make sure to provide\n'
         'a path to the binary via the --build_dir flag or the BUILD_DIR\n'
         'environment variable.' % path)
-    sys.stdout.write(message)
+    print >> sys.stderr, message
     sys.exit(1)
 
   return path
diff --git a/googletest/test/gtest_throw_on_failure_test.py b/googletest/test/gtest_throw_on_failure_test.py
index 3e7740ca..5678ffea 100755
--- a/googletest/test/gtest_throw_on_failure_test.py
+++ b/googletest/test/gtest_throw_on_failure_test.py
@@ -70,7 +70,7 @@ def SetEnvVar(env_var, value):
 def Run(command):
   """Runs a command; returns True/False if its exit code is/isn't 0."""
 
-  print('Running "%s". . .' % ' '.join(command))
+  print 'Running "%s". . .' % ' '.join(command)
   p = gtest_test_utils.Subprocess(command)
   return p.exited and p.exit_code == 0
 
diff --git a/googletest/test/gtest_uninitialized_test.py b/googletest/test/gtest_uninitialized_test.py
index 43583700..41bc4810 100755
--- a/googletest/test/gtest_uninitialized_test.py
+++ b/googletest/test/gtest_uninitialized_test.py
@@ -33,6 +33,7 @@
 
 __author__ = 'wan@google.com (Zhanyong Wan)'
 
+import os
 import gtest_test_utils
 
 
@@ -46,8 +47,8 @@ def Assert(condition):
 
 def AssertEq(expected, actual):
   if expected != actual:
-    print('Expected: %s' % (expected,))
-    print('  Actual: %s' % (actual,))
+    print 'Expected: %s' % (expected,)
+    print '  Actual: %s' % (actual,)
     raise AssertionError
 
 
diff --git a/googletest/test/gtest_xml_outfiles_test.py b/googletest/test/gtest_xml_outfiles_test.py
index 678f546c..24c6ee6b 100755
--- a/googletest/test/gtest_xml_outfiles_test.py
+++ b/googletest/test/gtest_xml_outfiles_test.py
@@ -31,15 +31,11 @@
 
 """Unit test for the gtest_xml_output module."""
 
-__author__ = "keith.ray@gmail.com (Keith Ray)"
-
 import os
 from xml.dom import minidom, Node
-
 import gtest_test_utils
 import gtest_xml_test_utils
 
-
 GTEST_OUTPUT_SUBDIR = "xml_outfiles"
 GTEST_OUTPUT_1_TEST = "gtest_xml_outfile1_test_"
 GTEST_OUTPUT_2_TEST = "gtest_xml_outfile2_test_"