diff --git a/Lib/test/support.py b/Lib/test/support.py
index 1bf9ca5..d3f7f4c 100644
--- a/Lib/test/support.py
+++ b/Lib/test/support.py
@@ -301,23 +301,32 @@
         return 0, 0, 0
 
 def requires_mac_ver(*min_version):
-    """Raise SkipTest if the OS is Mac OS X and the OS X version if less than
-    min_version.
+    """Decorator raising SkipTest if the OS is Mac OS X and the OS X
+    version if less than min_version.
 
-    For example, support.requires_linux_version(10, 5) raises SkipTest if the
-    version is less than 10.5.
+    For example, @requires_mac_ver(10, 5) raises SkipTest if the OS X version
+    is lesser than 10.5.
     """
-    if sys.platform != 'darwin':
-        return
-    version_txt = platform.mac_ver()[0]
-    try:
-        version = tuple(map(int, version_txt.split('.')))
-    except ValueError:
-        return
-    if version < min_version:
-        min_version_txt = '.'.join(map(str, min_version))
-        raise unittest.SkipTest("Mac OS X %s or higher required, not %s"
-                                % (min_version_txt, version_txt))
+    def decorator(func):
+        @functools.wraps(func)
+        def wrapper(*args, **kw):
+            if sys.platform == 'darwin':
+                version_txt = platform.mac_ver()[0]
+                try:
+                    version = tuple(map(int, version_txt.split('.')))
+                except ValueError:
+                    pass
+                else:
+                    if version < min_version:
+                        min_version_txt = '.'.join(map(str, min_version))
+                        raise unittest.SkipTest(
+                            "Mac OS X %s or higher required, not %s"
+                            % (min_version_txt, version_txt))
+            return func(*args, **kw)
+        wrapper.min_version = min_version
+        return wrapper
+    return decorator
+
 
 HOST = 'localhost'
 
diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py
index 636ff2c..715003a 100644
--- a/Lib/test/test_math.py
+++ b/Lib/test/test_math.py
@@ -670,10 +670,9 @@
         self.assertTrue(math.isnan(math.log2(NAN)))
 
     @requires_IEEE_754
+    # log2() is not accurate enough on Mac OS X Tiger (10.4)
+    @support.requires_mac_ver(10, 5)
     def testLog2Exact(self):
-        # log2() is not accurate enough on Mac OS X Tiger (10.4)
-        support.requires_mac_ver(10, 5)
-
         # Check that we get exact equality for log2 of powers of 2.
         actual = [math.log2(math.ldexp(1.0, n)) for n in range(-1074, 1024)]
         expected = [float(n) for n in range(-1074, 1024)]
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index 859df34..7d4ca2c 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -1281,6 +1281,11 @@
                          "Some fds were left open")
         self.assertIn(1, remaining_fds, "Subprocess failed")
 
+    # Mac OS X Tiger (10.4) has a kernel bug: sometimes, the file
+    # descriptor of a pipe closed in the parent process is valid in the
+    # child process according to fstat(), but the mode of the file
+    # descriptor is invalid, and read or write raise an error.
+    @support.requires_mac_ver(10, 5)
     def test_pass_fds(self):
         fd_status = support.findfile("fd_status.py", subdir="subprocessdata")