diff --git a/Lib/test/test___all__.py b/Lib/test/test___all__.py
index e4f0f44..d8e850a 100644
--- a/Lib/test/test___all__.py
+++ b/Lib/test/test___all__.py
@@ -132,7 +132,6 @@
         self.check_all("rlcompleter")
         self.check_all("robotparser")
         self.check_all("sched")
-        self.check_all("sets")
         self.check_all("sgmllib")
         self.check_all("shelve")
         self.check_all("shlex")
diff --git a/Lib/test/test_optparse.py b/Lib/test/test_optparse.py
index aa6525e..e05fbc6 100644
--- a/Lib/test/test_optparse.py
+++ b/Lib/test/test_optparse.py
@@ -1500,8 +1500,16 @@
         self.assertHelpEquals(_expected_help_long_opts_first)
 
     def test_help_title_formatter(self):
-        self.parser.formatter = TitledHelpFormatter()
-        self.assertHelpEquals(_expected_help_title_formatter)
+        save = os.environ.get("COLUMNS")
+        try:
+            os.environ["COLUMNS"] = "80"
+            self.parser.formatter = TitledHelpFormatter()
+            self.assertHelpEquals(_expected_help_title_formatter)
+        finally:
+            if save is not None:
+                os.environ["COLUMNS"] = save
+            else:
+                del os.environ["COLUMNS"]
 
     def test_wrap_columns(self):
         # Ensure that wrapping respects $COLUMNS environment variable.
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index 0d08b79..a1c797c 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -476,6 +476,16 @@
 class TestSetSubclass(TestSet):
     thetype = SetSubclass
 
+class SetSubclassWithKeywordArgs(set):
+    def __init__(self, iterable=[], newarg=None):
+        set.__init__(self, iterable)
+
+class TestSetSubclassWithKeywordArgs(TestSet):
+    
+    def test_keywords_in_subclass(self):
+        'SF bug #1486663 -- this used to erroneously raise a TypeError'
+        SetSubclassWithKeywordArgs(newarg=1)
+
 class TestFrozenSet(TestJointOps):
     thetype = frozenset
 
@@ -1454,6 +1464,7 @@
     test_classes = (
         TestSet,
         TestSetSubclass,
+        TestSetSubclassWithKeywordArgs,        
         TestFrozenSet,
         TestFrozenSetSubclass,
         TestSetOfSets,
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index fcc0f45..1b34d61 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -430,6 +430,8 @@
                          '"a\\\\b c" d e')
         self.assertEqual(subprocess.list2cmdline(['a\\\\b\\ c', 'd', 'e']),
                          '"a\\\\b\\ c" d e')
+        self.assertEqual(subprocess.list2cmdline(['ab', '']),
+                         'ab ""')
 
 
     def test_poll(self):