diff --git a/Lib/distutils/tests/test_bdist_rpm.py b/Lib/distutils/tests/test_bdist_rpm.py
--- a/Lib/distutils/tests/test_bdist_rpm.py
+++ b/Lib/distutils/tests/test_bdist_rpm.py
@@ -1,10 +1,11 @@
 """Tests for distutils.command.bdist_rpm."""
 
+import os
+import platform
+import shutil
+import sys
+import tempfile
 import unittest
-import sys
-import os
-import tempfile
-import shutil
 from test.support import run_unittest
 
 from distutils.core import Distribution
@@ -42,7 +43,7 @@ class BuildRpmTestCase(support.TempdirMa
 
         # XXX I am unable yet to make this test work without
         # spurious sdtout/stderr output under Mac OS X
-        if sys.platform != 'linux2':
+        if platform.system() != 'Linux':
             return
 
         # this test will run only if the rpm commands are found
@@ -82,7 +83,7 @@ class BuildRpmTestCase(support.TempdirMa
 
         # XXX I am unable yet to make this test work without
         # spurious sdtout/stderr output under Mac OS X
-        if sys.platform != 'linux2':
+        if platform.system() != 'Linux':
             return
 
         # http://bugs.python.org/issue1533164
diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -1473,6 +1473,7 @@ _expectations['freebsd5'] = _expectation
 _expectations['freebsd6'] = _expectations['freebsd4']
 _expectations['freebsd7'] = _expectations['freebsd4']
 _expectations['freebsd8'] = _expectations['freebsd4']
+_expectations['linux3'] = _expectations['linux2']
 
 class _ExpectedSkips:
     def __init__(self):
diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -2056,7 +2056,7 @@ def test_main():
     ])
     if hasattr(socket, "socketpair"):
         tests.append(BasicSocketPairTest)
-    if sys.platform == 'linux2':
+    if platform.system() != 'Linux':
         tests.append(TestLinuxAbstractNamespace)
     if isTipcAvailable():
         tests.append(TIPCTest)
diff --git a/Lib/test/test_tarfile.py b/Lib/test/test_tarfile.py
--- a/Lib/test/test_tarfile.py
+++ b/Lib/test/test_tarfile.py
@@ -1,14 +1,12 @@
+import errno
+import io
+import os
+import platform
+import shutil
 import sys
-import os
-import io
-import shutil
-import io
+import tarfile
+import unittest
 from hashlib import md5
-import errno
-
-import unittest
-import tarfile
-
 from test import support
 
 # Check for our compression modules.
@@ -703,7 +701,7 @@ class GNUReadTest(LongnameTest):
         # Return True if the platform knows the st_blocks stat attribute and
         # uses st_blocks units of 512 bytes, and if the filesystem is able to
         # store holes in files.
-        if sys.platform == "linux2":
+        if platform.system() == "Linux":
             # Linux evidentially has 512 byte st_blocks units.
             name = os.path.join(TEMPDIR, "sparse-test")
             with open(name, "wb") as fobj:
diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -1375,9 +1375,7 @@ class PyBuildExt(build_ext):
         # End multiprocessing
 
         # Platform-specific libraries
-        if (platform in ('linux2', 'freebsd4', 'freebsd5', 'freebsd6',
-                        'freebsd7', 'freebsd8')
-            or platform.startswith("gnukfreebsd")):
+        if os.uname()[0] in ('Linux', 'FreeBSD'):
             exts.append( Extension('ossaudiodev', ['ossaudiodev.c']) )
         else:
             missing.append('ossaudiodev')