diff --git a/Lib/distutils/cmd.py b/Lib/distutils/cmd.py
index aff7d68..ae4efc7 100644
--- a/Lib/distutils/cmd.py
+++ b/Lib/distutils/cmd.py
@@ -157,7 +157,7 @@
         self.announce(indent + header, level=log.INFO)
         indent = indent + "  "
         for (option, _, _) in self.user_options:
-            option = longopt_xlate(option)
+            option = option.translate(longopt_xlate)
             if option[-1] == "=":
                 option = option[:-1]
             value = getattr(self, option)
diff --git a/Lib/distutils/fancy_getopt.py b/Lib/distutils/fancy_getopt.py
index 72441fb..879d4d2 100644
--- a/Lib/distutils/fancy_getopt.py
+++ b/Lib/distutils/fancy_getopt.py
@@ -26,7 +26,7 @@
 
 # This is used to translate long options to legitimate Python identifiers
 # (for use as attributes of some object).
-longopt_xlate = lambda s: s.replace('-', '_')
+longopt_xlate = str.maketrans('-', '_')
 
 class FancyGetopt:
     """Wrapper around the standard 'getopt()' module that provides some
@@ -107,7 +107,7 @@
         """Translate long option name 'long_option' to the form it
         has as an attribute of some object: ie., translate hyphens
         to underscores."""
-        return longopt_xlate(long_option)
+        return long_option.translate(longopt_xlate)
 
     def _check_alias_dict(self, aliases, what):
         assert isinstance(aliases, dict)
@@ -432,7 +432,7 @@
     """Convert a long option name to a valid Python identifier by
     changing "-" to "_".
     """
-    return longopt_xlate(opt)
+    return opt.translate(longopt_xlate)
 
 
 class OptionDummy:
diff --git a/Lib/distutils/tests/test_ccompiler.py b/Lib/distutils/tests/test_ccompiler.py
index 58c8c5d..9db8d24 100644
--- a/Lib/distutils/tests/test_ccompiler.py
+++ b/Lib/distutils/tests/test_ccompiler.py
@@ -1,8 +1,10 @@
 """Tests for distutils.ccompiler."""
 import os
 import unittest
+from test.support import captured_stdout
 
-from distutils.ccompiler import gen_lib_options
+from distutils.ccompiler import gen_lib_options, CCompiler
+from distutils import debug
 
 class FakeCompiler(object):
     def library_dir_option(self, dir):
@@ -30,6 +32,26 @@
                   '-lname2']
         self.assertEquals(opts, wanted)
 
+    def test_debug_print(self):
+
+        class MyCCompiler(CCompiler):
+            executables = {}
+
+        compiler = MyCCompiler()
+        with captured_stdout() as stdout:
+            compiler.debug_print('xxx')
+        stdout.seek(0)
+        self.assertEquals(stdout.read(), '')
+
+        debug.DEBUG = True
+        try:
+            with captured_stdout() as stdout:
+                compiler.debug_print('xxx')
+            stdout.seek(0)
+            self.assertEquals(stdout.read(), 'xxx\n')
+        finally:
+            debug.DEBUG = False
+
 def test_suite():
     return unittest.makeSuite(CCompilerTestCase)
 
diff --git a/Lib/distutils/tests/test_cmd.py b/Lib/distutils/tests/test_cmd.py
index d6438b5..55ae421 100644
--- a/Lib/distutils/tests/test_cmd.py
+++ b/Lib/distutils/tests/test_cmd.py
@@ -1,10 +1,12 @@
 """Tests for distutils.cmd."""
 import unittest
 import os
+from test.support import captured_stdout
 
 from distutils.cmd import Command
 from distutils.dist import Distribution
 from distutils.errors import DistutilsOptionError
+from distutils import debug
 
 class MyCmd(Command):
     def initialize_options(self):
@@ -102,6 +104,22 @@
         cmd.option2 = 'xxx'
         self.assertRaises(DistutilsOptionError, cmd.ensure_dirname, 'option2')
 
+    def test_debug_print(self):
+        cmd = self.cmd
+        with captured_stdout() as stdout:
+            cmd.debug_print('xxx')
+        stdout.seek(0)
+        self.assertEquals(stdout.read(), '')
+
+        debug.DEBUG = True
+        try:
+            with captured_stdout() as stdout:
+                cmd.debug_print('xxx')
+            stdout.seek(0)
+            self.assertEquals(stdout.read(), 'xxx\n')
+        finally:
+            debug.DEBUG = False
+
 def test_suite():
     return unittest.makeSuite(CommandTestCase)
 
diff --git a/Lib/distutils/tests/test_core.py b/Lib/distutils/tests/test_core.py
index 7f021dc..b5f391f 100644
--- a/Lib/distutils/tests/test_core.py
+++ b/Lib/distutils/tests/test_core.py
@@ -6,6 +6,7 @@
 import shutil
 import sys
 import test.support
+from test.support import captured_stdout
 import unittest
 
 
@@ -33,10 +34,12 @@
     def setUp(self):
         self.old_stdout = sys.stdout
         self.cleanup_testfn()
+        self.old_argv = sys.argv[:]
 
     def tearDown(self):
         sys.stdout = self.old_stdout
         self.cleanup_testfn()
+        sys.argv = self.old_argv[:]
 
     def cleanup_testfn(self):
         path = test.support.TESTFN
@@ -73,6 +76,23 @@
             output = output[:-1]
         self.assertEqual(cwd, output)
 
+    def test_debug_mode(self):
+        # this covers the code called when DEBUG is set
+        sys.argv = ['setup.py', '--name']
+        with captured_stdout() as stdout:
+            distutils.core.setup(name='bar')
+        stdout.seek(0)
+        self.assertEquals(stdout.read(), 'bar\n')
+
+        distutils.core.DEBUG = True
+        try:
+            with captured_stdout() as stdout:
+                distutils.core.setup(name='bar')
+        finally:
+            distutils.core.DEBUG = False
+        stdout.seek(0)
+        wanted = "options (after parsing config files):\n"
+        self.assertEquals(stdout.readlines()[0], wanted)
 
 def test_suite():
     return unittest.makeSuite(CoreTestCase)
diff --git a/Lib/distutils/tests/test_filelist.py b/Lib/distutils/tests/test_filelist.py
index cf64c74..d98325a 100644
--- a/Lib/distutils/tests/test_filelist.py
+++ b/Lib/distutils/tests/test_filelist.py
@@ -1,7 +1,10 @@
 """Tests for distutils.filelist."""
 from os.path import join
 import unittest
+from test.support import captured_stdout
+
 from distutils.filelist import glob_to_re, FileList
+from distutils import debug
 
 MANIFEST_IN = """\
 include ok
@@ -59,6 +62,22 @@
 
         self.assertEquals(file_list.files, wanted)
 
+    def test_debug_print(self):
+        file_list = FileList()
+        with captured_stdout() as stdout:
+            file_list.debug_print('xxx')
+        stdout.seek(0)
+        self.assertEquals(stdout.read(), '')
+
+        debug.DEBUG = True
+        try:
+            with captured_stdout() as stdout:
+                file_list.debug_print('xxx')
+            stdout.seek(0)
+            self.assertEquals(stdout.read(), 'xxx\n')
+        finally:
+            debug.DEBUG = False
+
 def test_suite():
     return unittest.makeSuite(FileListTestCase)
 
diff --git a/Lib/distutils/tests/test_install.py b/Lib/distutils/tests/test_install.py
index d0ad5ce..2087a0e 100644
--- a/Lib/distutils/tests/test_install.py
+++ b/Lib/distutils/tests/test_install.py
@@ -6,6 +6,8 @@
 import unittest
 import site
 
+from test.support import captured_stdout
+
 from distutils.command.install import install
 from distutils.command import install as install_module
 from distutils.command.install import INSTALL_SCHEMES
@@ -14,7 +16,6 @@
 
 from distutils.tests import support
 
-
 class InstallTestCase(support.TempdirManager,
                       support.LoggingSilencer,
                       unittest.TestCase):
@@ -183,6 +184,17 @@
         with open(cmd.record) as f:
             self.assertEquals(len(f.readlines()), 1)
 
+    def test_debug_mode(self):
+        # this covers the code called when DEBUG is set
+        old_logs_len = len(self.logs)
+        install_module.DEBUG = True
+        try:
+            with captured_stdout() as stdout:
+                self.test_record()
+        finally:
+            install_module.DEBUG = False
+        self.assertTrue(len(self.logs) > old_logs_len)
+
 def test_suite():
     return unittest.makeSuite(InstallTestCase)