Python 2.6 doesn't have assert_is

IPython/utils/tests/test_importstring.py

@@ -1,39 +1,39 b''
 """Tests for IPython.utils.importstring."""
 
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2013  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.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
 import nose.tools as nt
 
 from IPython.utils.importstring import import_item
 
 #-----------------------------------------------------------------------------
 # Tests
 #-----------------------------------------------------------------------------
 
 def test_import_plain():
     "Test simple imports"
     import os
     os2 = import_item('os')
-    nt.assert_is(os, os2)
+    nt.assert_true(os is os2)
 
 
 def test_import_nested():
     "Test nested imports from the stdlib"
     from os import path
     path2 = import_item('os.path')
-    nt.assert_is(path, path2)
+    nt.assert_true(path is path2)
 
 
 def test_import_raises():
     "Test that failing imports raise the right exception"
     nt.assert_raises(ImportError, import_item, 'IPython.foobar')