diff --git a/IPython/frontend/asyncfrontendbase.py b/IPython/frontend/asyncfrontendbase.py
index 78afa18..cc7ada6 100644
--- a/IPython/frontend/asyncfrontendbase.py
+++ b/IPython/frontend/asyncfrontendbase.py
@@ -14,12 +14,13 @@ __docformat__ = "restructuredtext en"
 #-------------------------------------------------------------------------------
 # Imports
 #-------------------------------------------------------------------------------
-from IPython.external import guid
 
+from IPython.external import guid
 
 from zope.interface import Interface, Attribute, implements, classProvides
 from twisted.python.failure import Failure
-from IPython.frontend.frontendbase import FrontEndBase, IFrontEnd, IFrontEndFactory
+from IPython.frontend.frontendbase import (
+    FrontEndBase, IFrontEnd, IFrontEndFactory)
 from IPython.kernel.core.history import FrontEndHistory
 from IPython.kernel.engineservice import IEngineCore
 
diff --git a/IPython/frontend/cocoa/tests/test_cocoa_frontend.py b/IPython/frontend/cocoa/tests/test_cocoa_frontend.py
index a5510e7..58b78e4 100644
--- a/IPython/frontend/cocoa/tests/test_cocoa_frontend.py
+++ b/IPython/frontend/cocoa/tests/test_cocoa_frontend.py
@@ -15,31 +15,38 @@ __docformat__ = "restructuredtext en"
 # Imports                                                                   
 #---------------------------------------------------------------------------
 
+# Tell nose to skip this module
+__test__ = {}
+
+from twisted.trial import unittest
+from twisted.internet.defer import succeed
+
+from IPython.kernel.core.interpreter import Interpreter
+import IPython.kernel.engineservice as es
 
 try:
-    from IPython.kernel.core.interpreter import Interpreter
-    import IPython.kernel.engineservice as es
-    from IPython.testing.util import DeferredTestCase
-    from twisted.internet.defer import succeed
-    from IPython.frontend.cocoa.cocoa_frontend import IPythonCocoaController                                                    
+    from IPython.frontend.cocoa.cocoa_frontend import IPythonCocoaController
     from Foundation import NSMakeRect
     from AppKit import NSTextView, NSScrollView
 except ImportError:
-    import nose
-    raise nose.SkipTest("This test requires zope.interface, Twisted, Foolscap and PyObjC")
+    # This tells twisted.trial to skip this module if PyObjC is not found
+    skip = True
 
-class TestIPythonCocoaControler(DeferredTestCase):
+#---------------------------------------------------------------------------
+# Tests
+#---------------------------------------------------------------------------
+class TestIPythonCocoaControler(unittest.TestCase):
     """Tests for IPythonCocoaController"""
-   
+
     def setUp(self):
         self.controller = IPythonCocoaController.alloc().init()
         self.engine = es.EngineService()
         self.engine.startService()
-   
+
     def tearDown(self):
         self.controller = None
         self.engine.stopService()
-   
+
     def testControllerExecutesCode(self):
         code ="""5+5"""
         expected = Interpreter().execute(code)
@@ -48,48 +55,46 @@ class TestIPythonCocoaControler(DeferredTestCase):
             del result['number']
             del result['id']
             return result
-        self.assertDeferredEquals(
-            self.controller.execute(code).addCallback(removeNumberAndID), 
-            expected)
-   
+        d = self.controller.execute(code)
+        d.addCallback(removeNumberAndID)
+        d.addCallback(lambda r: self.assertEquals(r, expected))
+
     def testControllerMirrorsUserNSWithValuesAsStrings(self):
         code = """userns1=1;userns2=2"""
         def testControllerUserNS(result):
             self.assertEquals(self.controller.userNS['userns1'], 1)
             self.assertEquals(self.controller.userNS['userns2'], 2)
-       
         self.controller.execute(code).addCallback(testControllerUserNS)
-   
-   
+
     def testControllerInstantiatesIEngine(self):
         self.assert_(es.IEngineBase.providedBy(self.controller.engine))
-   
+
     def testControllerCompletesToken(self):
         code = """longNameVariable=10"""
         def testCompletes(result):
             self.assert_("longNameVariable" in result)
-       
+
         def testCompleteToken(result):
             self.controller.complete("longNa").addCallback(testCompletes)
-       
+
         self.controller.execute(code).addCallback(testCompletes)
-   
-   
+
+
     def testCurrentIndent(self):
         """test that current_indent_string returns current indent or None.
         Uses _indent_for_block for direct unit testing.
         """
-       
+        
         self.controller.tabUsesSpaces = True
         self.assert_(self.controller._indent_for_block("""a=3""") == None)
         self.assert_(self.controller._indent_for_block("") == None)
         block = """def test():\n    a=3"""
         self.assert_(self.controller._indent_for_block(block) == \
                     ' ' * self.controller.tabSpaces)
-       
+        
         block = """if(True):\n%sif(False):\n%spass""" % \
                     (' '*self.controller.tabSpaces,
                      2*' '*self.controller.tabSpaces)
         self.assert_(self.controller._indent_for_block(block) == \
                     2*(' '*self.controller.tabSpaces))
-   
+
diff --git a/IPython/frontend/tests/test_asyncfrontendbase.py b/IPython/frontend/tests/test_asyncfrontendbase.py
index b3ed0e6..fb497c8 100644
--- a/IPython/frontend/tests/test_asyncfrontendbase.py
+++ b/IPython/frontend/tests/test_asyncfrontendbase.py
@@ -15,16 +15,14 @@ __docformat__ = "restructuredtext en"
 # Imports                                                                   
 #---------------------------------------------------------------------------
 
+# Tell nose to skip this module
+__test__ = {}
 
-try:
-    from twisted.trial import unittest
-    from IPython.frontend.asyncfrontendbase import AsyncFrontEndBase
-    from IPython.frontend import frontendbase 
-    from IPython.kernel.engineservice import EngineService
-    from IPython.testing.parametric import Parametric, parametric
-except ImportError:
-    import nose
-    raise nose.SkipTest("This test requires zope.interface, Twisted and Foolscap")
+from twisted.trial import unittest
+from IPython.frontend.asyncfrontendbase import AsyncFrontEndBase
+from IPython.frontend import frontendbase 
+from IPython.kernel.engineservice import EngineService
+from IPython.testing.parametric import Parametric, parametric
 
 
 class FrontEndCallbackChecker(AsyncFrontEndBase):
diff --git a/IPython/frontend/tests/test_process.py b/IPython/frontend/tests/test_process.py
index f0f607c..0b7adf8 100644
--- a/IPython/frontend/tests/test_process.py
+++ b/IPython/frontend/tests/test_process.py
@@ -5,12 +5,12 @@ Test process execution and IO redirection.
 
 __docformat__ = "restructuredtext en"
 
-#-------------------------------------------------------------------------------
-#  Copyright (C) 2008  The IPython Development Team
+#-----------------------------------------------------------------------------
+#  Copyright (C) 2008-2009  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is
 #  in the file COPYING, distributed as part of this software.
-#-------------------------------------------------------------------------------
+#-----------------------------------------------------------------------------
 
 from cStringIO import StringIO
 from time import sleep
diff --git a/IPython/kernel/core/tests/test_interpreter.py b/IPython/kernel/core/tests/test_interpreter.py
index 5fa68cf..0db9a13 100644
--- a/IPython/kernel/core/tests/test_interpreter.py
+++ b/IPython/kernel/core/tests/test_interpreter.py
@@ -22,6 +22,9 @@ from IPython.kernel.core.interpreter import Interpreter
 # Tests 
 #-----------------------------------------------------------------------------
 
+# Tell nose to skip this module
+__test__ = {}
+
 class TestInterpreter(unittest.TestCase):
 
     def test_unicode(self):
diff --git a/IPython/kernel/core/tests/test_notification.py b/IPython/kernel/core/tests/test_notification.py
index 07d9286..255da35 100644
--- a/IPython/kernel/core/tests/test_notification.py
+++ b/IPython/kernel/core/tests/test_notification.py
@@ -15,6 +15,9 @@ __docformat__ = "restructuredtext en"
 # Imports                                                                     
 #-----------------------------------------------------------------------------
 
+# Tell nose to skip this module
+__test__ = {}
+
 import unittest
 import IPython.kernel.core.notification as notification
 from nose.tools import timed
diff --git a/IPython/kernel/core/tests/test_redirectors.py b/IPython/kernel/core/tests/test_redirectors.py
index 81aa0ba..5b5c6f3 100644
--- a/IPython/kernel/core/tests/test_redirectors.py
+++ b/IPython/kernel/core/tests/test_redirectors.py
@@ -12,12 +12,12 @@ __docformat__ = "restructuredtext en"
 #  in the file COPYING, distributed as part of this software.
 #-------------------------------------------------------------------------------
 
+# Tell nose to skip this module
+__test__ = {}
 
-# Stdlib imports
 import os
 from cStringIO import StringIO
 
-# Our own imports
 from IPython.testing import decorators as dec
 
 #-----------------------------------------------------------------------------
diff --git a/IPython/kernel/tests/test_contexts.py b/IPython/kernel/tests/test_contexts.py
index 2ef2dec..fe726c3 100644
--- a/IPython/kernel/tests/test_contexts.py
+++ b/IPython/kernel/tests/test_contexts.py
@@ -1,3 +1,6 @@
+# Tell nose to skip this module
+__test__ = {}
+
 #from __future__ import with_statement
 
 # XXX This file is currently disabled to preserve 2.4 compatibility.
diff --git a/IPython/kernel/tests/test_controllerservice.py b/IPython/kernel/tests/test_controllerservice.py
index 21f30b3..749fac7 100644
--- a/IPython/kernel/tests/test_controllerservice.py
+++ b/IPython/kernel/tests/test_controllerservice.py
@@ -23,15 +23,15 @@ __docformat__ = "restructuredtext en"
 # Imports
 #-------------------------------------------------------------------------------
 
-try:
-    from twisted.application.service import IService
-    from IPython.kernel.controllerservice import ControllerService
-    from IPython.kernel.tests import multienginetest as met
-    from controllertest import IControllerCoreTestCase
-    from IPython.testing.util import DeferredTestCase
-except ImportError:
-    import nose
-    raise nose.SkipTest("This test requires zope.interface, Twisted and Foolscap")
+# Tell nose to skip this module
+__test__ = {}
+
+from twisted.application.service import IService
+from IPython.kernel.controllerservice import ControllerService
+from IPython.kernel.tests import multienginetest as met
+from controllertest import IControllerCoreTestCase
+from IPython.testing.util import DeferredTestCase
+
 
 class BasicControllerServiceTest(DeferredTestCase,
     IControllerCoreTestCase):
diff --git a/IPython/kernel/tests/test_enginefc.py b/IPython/kernel/tests/test_enginefc.py
index b8d0caf..502b421 100644
--- a/IPython/kernel/tests/test_enginefc.py
+++ b/IPython/kernel/tests/test_enginefc.py
@@ -15,30 +15,29 @@ __docformat__ = "restructuredtext en"
 # Imports
 #-------------------------------------------------------------------------------
 
-try:
-    from twisted.python import components
-    from twisted.internet import reactor, defer
-    from twisted.spread import pb
-    from twisted.internet.base import DelayedCall
-    DelayedCall.debug = True
+# Tell nose to skip this module
+__test__ = {}
 
-    import zope.interface as zi
+from twisted.python import components
+from twisted.internet import reactor, defer
+from twisted.spread import pb
+from twisted.internet.base import DelayedCall
+DelayedCall.debug = True
 
-    from IPython.kernel.fcutil import Tub, UnauthenticatedTub
-    from IPython.kernel import engineservice as es
-    from IPython.testing.util import DeferredTestCase
-    from IPython.kernel.controllerservice import IControllerBase
-    from IPython.kernel.enginefc import FCRemoteEngineRefFromService, IEngineBase
-    from IPython.kernel.engineservice import IEngineQueued
-    from IPython.kernel.engineconnector import EngineConnector
-    
-    from IPython.kernel.tests.engineservicetest import \
-        IEngineCoreTestCase, \
-        IEngineSerializedTestCase, \
-        IEngineQueuedTestCase
-except ImportError:
-    import nose
-    raise nose.SkipTest("This test requires zope.interface, Twisted and Foolscap")
+import zope.interface as zi
+
+from IPython.kernel.fcutil import Tub, UnauthenticatedTub
+from IPython.kernel import engineservice as es
+from IPython.testing.util import DeferredTestCase
+from IPython.kernel.controllerservice import IControllerBase
+from IPython.kernel.enginefc import FCRemoteEngineRefFromService, IEngineBase
+from IPython.kernel.engineservice import IEngineQueued
+from IPython.kernel.engineconnector import EngineConnector
+
+from IPython.kernel.tests.engineservicetest import \
+    IEngineCoreTestCase, \
+    IEngineSerializedTestCase, \
+    IEngineQueuedTestCase
 
 
 class EngineFCTest(DeferredTestCase, 
diff --git a/IPython/kernel/tests/test_engineservice.py b/IPython/kernel/tests/test_engineservice.py
index 22a47eb..a455030 100644
--- a/IPython/kernel/tests/test_engineservice.py
+++ b/IPython/kernel/tests/test_engineservice.py
@@ -23,20 +23,19 @@ __docformat__ = "restructuredtext en"
 # Imports
 #-------------------------------------------------------------------------------
 
-try:
-    from twisted.internet import defer
-    from twisted.application.service import IService
-    
-    from IPython.kernel import engineservice as es
-    from IPython.testing.util import DeferredTestCase
-    from IPython.kernel.tests.engineservicetest import \
-        IEngineCoreTestCase, \
-        IEngineSerializedTestCase, \
-        IEngineQueuedTestCase, \
-        IEnginePropertiesTestCase
-except ImportError:
-    import nose
-    raise nose.SkipTest("This test requires zope.interface, Twisted and Foolscap")    
+# Tell nose to skip this module
+__test__ = {}
+
+from twisted.internet import defer
+from twisted.application.service import IService
+
+from IPython.kernel import engineservice as es
+from IPython.testing.util import DeferredTestCase
+from IPython.kernel.tests.engineservicetest import \
+    IEngineCoreTestCase, \
+    IEngineSerializedTestCase, \
+    IEngineQueuedTestCase, \
+    IEnginePropertiesTestCase
 
 
 class BasicEngineServiceTest(DeferredTestCase,
diff --git a/IPython/kernel/tests/test_multiengine.py b/IPython/kernel/tests/test_multiengine.py
index 08ca5f5..3fe397f 100644
--- a/IPython/kernel/tests/test_multiengine.py
+++ b/IPython/kernel/tests/test_multiengine.py
@@ -15,18 +15,17 @@ __docformat__ = "restructuredtext en"
 # Imports
 #-----------------------------------------------------------------------------
 
-try:
-    from twisted.internet import defer
-    from IPython.testing.util import DeferredTestCase
-    from IPython.kernel.controllerservice import ControllerService
-    from IPython.kernel import multiengine as me
-    from IPython.kernel.tests.multienginetest import (IMultiEngineTestCase,
-        ISynchronousMultiEngineTestCase)
-except ImportError:
-    import nose
-    raise nose.SkipTest("This test requires zope.interface, Twisted and Foolscap")
-
- 
+# Tell nose to skip this module
+__test__ = {}
+
+from twisted.internet import defer
+from IPython.testing.util import DeferredTestCase
+from IPython.kernel.controllerservice import ControllerService
+from IPython.kernel import multiengine as me
+from IPython.kernel.tests.multienginetest import (IMultiEngineTestCase,
+    ISynchronousMultiEngineTestCase)
+
+
 class BasicMultiEngineTestCase(DeferredTestCase, IMultiEngineTestCase):
 
     def setUp(self):
diff --git a/IPython/kernel/tests/test_multienginefc.py b/IPython/kernel/tests/test_multienginefc.py
index de24c4c..97d69e1 100644
--- a/IPython/kernel/tests/test_multienginefc.py
+++ b/IPython/kernel/tests/test_multienginefc.py
@@ -14,25 +14,25 @@ __docformat__ = "restructuredtext en"
 # Imports
 #-------------------------------------------------------------------------------
 
-try:
-    from twisted.internet import defer, reactor
+# Tell nose to skip this module
+__test__ = {}
+
+from twisted.internet import defer, reactor
+
+from IPython.kernel.fcutil import Tub, UnauthenticatedTub
+
+from IPython.testing.util import DeferredTestCase
+from IPython.kernel.controllerservice import ControllerService
+from IPython.kernel.multiengine import IMultiEngine
+from IPython.kernel.tests.multienginetest import IFullSynchronousMultiEngineTestCase
+from IPython.kernel.multienginefc import IFCSynchronousMultiEngine
+from IPython.kernel import multiengine as me
+from IPython.kernel.clientconnector import ClientConnector
+from IPython.kernel.parallelfunction import ParallelFunction
+from IPython.kernel.error import CompositeError
+from IPython.kernel.util import printer
 
-    from IPython.kernel.fcutil import Tub, UnauthenticatedTub
 
-    from IPython.testing.util import DeferredTestCase
-    from IPython.kernel.controllerservice import ControllerService
-    from IPython.kernel.multiengine import IMultiEngine
-    from IPython.kernel.tests.multienginetest import IFullSynchronousMultiEngineTestCase
-    from IPython.kernel.multienginefc import IFCSynchronousMultiEngine
-    from IPython.kernel import multiengine as me
-    from IPython.kernel.clientconnector import ClientConnector
-    from IPython.kernel.parallelfunction import ParallelFunction
-    from IPython.kernel.error import CompositeError
-    from IPython.kernel.util import printer
-except ImportError:
-    import nose
-    raise nose.SkipTest("This test requires zope.interface, Twisted and Foolscap")
-    
 def _raise_it(f):
     try:
         f.raiseException()
diff --git a/IPython/kernel/tests/test_newserialized.py b/IPython/kernel/tests/test_newserialized.py
index 0a9d460..57b6d7b 100644
--- a/IPython/kernel/tests/test_newserialized.py
+++ b/IPython/kernel/tests/test_newserialized.py
@@ -15,21 +15,21 @@ __docformat__ = "restructuredtext en"
 # Imports
 #-----------------------------------------------------------------------------
 
-try:
-    import zope.interface as zi
-    from twisted.trial import unittest
-    from IPython.testing.util import DeferredTestCase
+# Tell nose to skip this module
+__test__ = {}
+
+import zope.interface as zi
+from twisted.trial import unittest
+from IPython.testing.util import DeferredTestCase
+
+from IPython.kernel.newserialized import \
+    ISerialized, \
+    IUnSerialized, \
+    Serialized, \
+    UnSerialized, \
+    SerializeIt, \
+    UnSerializeIt
 
-    from IPython.kernel.newserialized import \
-        ISerialized, \
-        IUnSerialized, \
-        Serialized, \
-        UnSerialized, \
-        SerializeIt, \
-        UnSerializeIt
-except ImportError:
-    import nose
-    raise nose.SkipTest("This test requires zope.interface, Twisted and Foolscap")
 
 #-----------------------------------------------------------------------------
 # Tests
diff --git a/IPython/kernel/tests/test_pendingdeferred.py b/IPython/kernel/tests/test_pendingdeferred.py
index 73d3b84..e12b56b 100644
--- a/IPython/kernel/tests/test_pendingdeferred.py
+++ b/IPython/kernel/tests/test_pendingdeferred.py
@@ -16,18 +16,18 @@ __docformat__ = "restructuredtext en"
 # Imports
 #-------------------------------------------------------------------------------
 
-try:
-    from twisted.internet import defer
-    from twisted.python import failure
-
-    from IPython.testing.util import DeferredTestCase
-    import IPython.kernel.pendingdeferred as pd
-    from IPython.kernel import error
-    from IPython.kernel.util import printer
-except ImportError:
-    import nose
-    raise nose.SkipTest("This test requires zope.interface, Twisted and Foolscap")
-    
+# Tell nose to skip this module
+__test__ = {}
+
+from twisted.internet import defer
+from twisted.python import failure
+
+from IPython.testing.util import DeferredTestCase
+import IPython.kernel.pendingdeferred as pd
+from IPython.kernel import error
+from IPython.kernel.util import printer
+
+
 class Foo(object):
 
     def bar(self, bahz):
diff --git a/IPython/kernel/tests/test_task.py b/IPython/kernel/tests/test_task.py
index face815..7060579 100644
--- a/IPython/kernel/tests/test_task.py
+++ b/IPython/kernel/tests/test_task.py
@@ -15,19 +15,19 @@ __docformat__ = "restructuredtext en"
 # Imports
 #-------------------------------------------------------------------------------
 
-try:
-    import time
-
-    from twisted.internet import defer
-    from twisted.trial import unittest
-
-    from IPython.kernel import task, controllerservice as cs, engineservice as es
-    from IPython.kernel.multiengine import IMultiEngine
-    from IPython.testing.util import DeferredTestCase
-    from IPython.kernel.tests.tasktest import ITaskControllerTestCase
-except ImportError:
-    import nose
-    raise nose.SkipTest("This test requires zope.interface, Twisted and Foolscap")
+# Tell nose to skip this module
+__test__ = {}
+
+import time
+
+from twisted.internet import defer
+from twisted.trial import unittest
+
+from IPython.kernel import task, controllerservice as cs, engineservice as es
+from IPython.kernel.multiengine import IMultiEngine
+from IPython.testing.util import DeferredTestCase
+from IPython.kernel.tests.tasktest import ITaskControllerTestCase
+
 
 #-------------------------------------------------------------------------------
 # Tests
diff --git a/IPython/kernel/tests/test_taskfc.py b/IPython/kernel/tests/test_taskfc.py
index 266c7fa..371d800 100644
--- a/IPython/kernel/tests/test_taskfc.py
+++ b/IPython/kernel/tests/test_taskfc.py
@@ -14,27 +14,26 @@ __docformat__ = "restructuredtext en"
 # Imports
 #-------------------------------------------------------------------------------
 
-try:
-    import time
+# Tell nose to skip this module
+__test__ = {}
 
-    from twisted.internet import defer, reactor
+import time
 
-    from IPython.kernel.fcutil import Tub, UnauthenticatedTub
+from twisted.internet import defer, reactor
 
-    from IPython.kernel import task as taskmodule
-    from IPython.kernel import controllerservice as cs
-    import IPython.kernel.multiengine as me
-    from IPython.testing.util import DeferredTestCase
-    from IPython.kernel.multienginefc import IFCSynchronousMultiEngine
-    from IPython.kernel.taskfc import IFCTaskController
-    from IPython.kernel.util import printer
-    from IPython.kernel.tests.tasktest import ITaskControllerTestCase
-    from IPython.kernel.clientconnector import ClientConnector
-    from IPython.kernel.error import CompositeError
-    from IPython.kernel.parallelfunction import ParallelFunction
-except ImportError:
-    import nose
-    raise nose.SkipTest("This test requires zope.interface, Twisted and Foolscap")
+from IPython.kernel.fcutil import Tub, UnauthenticatedTub
+
+from IPython.kernel import task as taskmodule
+from IPython.kernel import controllerservice as cs
+import IPython.kernel.multiengine as me
+from IPython.testing.util import DeferredTestCase
+from IPython.kernel.multienginefc import IFCSynchronousMultiEngine
+from IPython.kernel.taskfc import IFCTaskController
+from IPython.kernel.util import printer
+from IPython.kernel.tests.tasktest import ITaskControllerTestCase
+from IPython.kernel.clientconnector import ClientConnector
+from IPython.kernel.error import CompositeError
+from IPython.kernel.parallelfunction import ParallelFunction
 
 
 #-------------------------------------------------------------------------------
diff --git a/IPython/kernel/tests/test_twistedutil.py b/IPython/kernel/tests/test_twistedutil.py
index 8e84053..9838ff3 100644
--- a/IPython/kernel/tests/test_twistedutil.py
+++ b/IPython/kernel/tests/test_twistedutil.py
@@ -12,6 +12,9 @@
 # Imports
 #-----------------------------------------------------------------------------
 
+# Tell nose to skip this module
+__test__ = {}
+
 import tempfile
 import os, sys
 
diff --git a/IPython/testing/decorators.py b/IPython/testing/decorators.py
index 5d588a0..10eefd4 100644
--- a/IPython/testing/decorators.py
+++ b/IPython/testing/decorators.py
@@ -123,10 +123,10 @@ def skipif(skip_condition, msg=None):
     Parameters
     ----------
     skip_condition : bool or callable. 
- 	Flag to determine whether to skip test.  If the condition is a 
- 	callable, it is used at runtime to dynamically make the decision.  This 
- 	is useful for tests that may require costly imports, to delay the cost 
- 	until the test suite is actually executed.        
+    Flag to determine whether to skip test.  If the condition is a 
+    callable, it is used at runtime to dynamically make the decision.  This 
+    is useful for tests that may require costly imports, to delay the cost 
+    until the test suite is actually executed.        
     msg : string
         Message to give on raising a SkipTest exception