Index: src/org/python/modules/operator.java
===================================================================
--- src/org/python/modules/operator.java	(revision 3414)
+++ src/org/python/modules/operator.java	(working copy)
@@ -58,6 +58,9 @@
         case 34: return arg1._ne(arg2);
         case 35: return arg1._truediv(arg2);
         case 36: return arg1._pow(arg2);
+	 case 37: return arg1._is(arg2);
+        case 38: return arg1._isnot(arg2);
+
         default:
             throw info.unexpectedCall(2, false);
         }
@@ -201,6 +204,12 @@
                         new OperatorFunctions("__truediv__", 35, 2));
         dict.__setitem__("pow", new OperatorFunctions("pow", 36, 2));
         dict.__setitem__("__pow__", new OperatorFunctions("pow", 36, 2));
+	 dict.__setitem__("is_", new OperatorFunctions("is_", 37, 2));
+        dict.__setitem__("__is__",
+                        new OperatorFunctions("__is__", 37, 2));
+        dict.__setitem__("is_not", new OperatorFunctions("is_not", 38, 2));
+        dict.__setitem__("__is_not__",
+	                new OperatorFunctions("__is_not__", 38, 2));
     }
 
     public static int countOf(PyObject seq, PyObject item) {
Index: Lib/test/test_bool.py
===================================================================
--- Lib/test/test_bool.py	(revision 3414)
+++ Lib/test/test_bool.py	(working copy)
@@ -339,11 +339,6 @@
             def __nonzero__(self):
                 return self
         check(Baz())
-
-# Jython transition 2.3
-#operator missing is function
-# http://jython.org/bugs/1758315
-del BoolTest.test_operator
 # boolean attribute returns int not bool
 # http://jython.org/bugs/1758276
 del BoolTest.test_fileclosed
Index: Lib/test/test_operator.py
===================================================================
--- Lib/test/test_operator.py	(revision 3414)
+++ Lib/test/test_operator.py	(working copy)
@@ -227,11 +227,7 @@
         self.failIf(operator.is_not(a, b))
         self.failUnless(operator.is_not(a,c))
 
-def test_main():
-    # Jython transition 2.3
-    # operator is missing is and is_not http://jython.org/bugs/1758315
-    del OperatorTestCase.test_is
-    del OperatorTestCase.test_is_not
+def test_main():   
     test_support.run_unittest(OperatorTestCase)